Hypertrophic pyloric stenosis is a condition in young infants that blocks food from leaving the stomach. Early signs of hypertrophic pyloric stenosis often include forceful vomiting after feeds, ongoing hunger, fewer wet diapers, and poor weight gain. It usually appears between about 2 and 8 weeks of age, and it is not a lifelong problem once treated. Not everyone will have the same experience. Hypertrophic pyloric stenosis can become serious without care because dehydration and salt imbalance may develop, but treatment with fluids and a small operation is usually very effective.
How many people live with Hypertrophic pyloric stenosis?
Hypertrophic pyloric stenosis usually shows up in the first weeks of life and is usually treated quickly, so experts often report how many babies are affected each year rather than how many people are living with it. Using the widely cited estimate that it affects about 2 to 5 out of every 1,000 births, this suggests roughly 270,000 to 670,000 babies worldwide each year (StatPearls, 2023; United Nations, 2024) and about 7,000 to 18,000 babies in the United States each year (StatPearls, 2023; CDC National Center for Health Statistics, 2025).
Overview
Hypertrophic pyloric stenosisSymptoms
Hypertrophic pyloric stenosis usually causes forceful vomiting soon after feeds, hunger right after vomiting, and fewer wet diapers. Early symptoms of hypertrophic pyloric stenosis can also include weight loss, constipation, and a small ripple or lump in the upper belly.
Outlook and prognosis
With prompt treatment, the outlook for hypertrophic pyloric stenosis is usually excellent. Most babies recover fully after surgery, start feeding well within days, and go on to have normal growth, with the blockage rarely coming back.
Causes and risk factors
Hypertrophic pyloric stenosis likely reflects a mix of inherited tendency and early-life factors. Risk is higher in first-born boys, babies with a family history, and those exposed early to macrolide antibiotics, especially erythromycin.
Genetic influences
Genetics matter in hypertrophic pyloric stenosis, but they are only part of the picture. Common genetic variations can raise risk, and hypertrophic pyloric stenosis often runs in families, yet sex, early feeding patterns, and some medicines may also contribute.
Diagnosis
Hypertrophic pyloric stenosis is usually diagnosed from symptoms and exam findings, especially forceful vomiting and poor weight gain. Doctors often confirm the diagnosis of hypertrophic pyloric stenosis with an abdominal ultrasound, and blood tests may check for dehydration.
Treatment and drugs
Hypertrophic pyloric stenosis is usually treated by first correcting dehydration and low salts with fluids through a vein. Then a short operation, called pyloromyotomy, gently splits the overgrown muscle so milk can pass into the intestine again.
Symptoms
Hypertrophic pyloric stenosis often shows up in the first weeks of life when feeding becomes difficult and vomiting keeps happening after meals. Babies may seem hungry again right after throwing up, but over time they can get tired, dehydrated, and stop gaining weight well. Early on, this might look like simple spit-up, so the early symptoms of hypertrophic pyloric stenosis can be easy to miss at first. The vomiting usually becomes more forceful over days.
In hypertrophic pyloric stenosis, vomiting often becomes sudden and forceful soon after a feed. It can look much stronger than normal spit-up, and it usually is not green.
Many babies seem ready to feed again right after vomiting because they are still hungry. This feeding-and-vomiting cycle can repeat many times in a day.
When milk does not stay down, babies may gain weight slowly or start losing weight. This can happen even when a baby seems eager to eat.
Fewer wet diapers, a dry mouth, and little or no tears with crying can be signs of dehydration. Some babies with hypertrophic pyloric stenosis also become sleepy, weak, or less alert.
How people usually first notice Hypertrophic pyloric stenosis?
Hypertrophic pyloric stenosis is usually first noticed in the first weeks of life, when a baby who had been feeding normally starts having forceful, projectile vomiting soon after feeds and still seems hungry right afterward. Many living with this condition are first brought to medical attention because families notice poor weight gain, fewer wet diapers, constipation, or signs of dehydration, and sometimes a small firm “olive-like” lump can be felt in the upper belly by a clinician. In plain terms, the first signs of hypertrophic pyloric stenosis happen because the muscle at the outlet of the stomach becomes too thick, making it hard for milk to pass through normally.
Types of Hypertrophic pyloric stenosis
No distinct types of hypertrophic pyloric stenosis are widely recognized.
Can I slow down the onset of symptoms?
No, there is no proven way to slow down or prevent the start of symptoms in hypertrophic pyloric stenosis, a condition where the muscle at the outlet of a baby’s stomach becomes too thick. Research has looked at factors such as family history and some early medicine exposures, but there is no well-established lifestyle change, diet change, preventive medicine, or routine screening that meaningfully delays when symptoms begin. The most helpful step is to spot early signs like forceful vomiting after feeds or poor weight gain and get care quickly, because treatment is usually very effective once the problem is found.
What genetics can tell you about symptoms
Genetics can help explain why some babies are more likely to develop hypertrophic pyloric stenosis, but they usually cannot predict the exact symptoms a child will have day to day. In families with a history of this condition, symptoms such as forceful vomiting may be more likely to appear, and inherited differences may play a part in when the narrowing starts and how quickly it becomes severe, although sex and other early-life factors also matter. Overall, genes seem to affect risk more than they clearly determine a unique symptom pattern.
Causes and risk factors
When doctors look at risk factors for hypertrophic pyloric stenosis in babies, they usually do not find one single cause. Family history matters, so babies with a parent or sibling who had hypertrophic pyloric stenosis have a higher chance of developing it. It’s rarely just one factor—it’s the mix that matters. The condition is also more common in boys, especially firstborn boys, and it has been linked to early exposure to certain antibiotics such as erythromycin or azithromycin. Bottle-feeding and smoking during pregnancy may also raise risk, but these factors do not guarantee that a baby will get the condition.
What are the most common causes or risk factors?
Hypertrophic pyloric stenosis, where the muscle at the outlet of a baby’s stomach becomes too thick and narrow, does not have one single known cause and is thought to result from a mix of inherited risk and early-life factors. It is more common in babies with a close family history of the condition, especially boys and first-born babies. The risk also seems to be higher with early exposure to certain antibiotics, especially erythromycin, as well as bottle-feeding and smoking during pregnancy.
Environmental and biological risk factors
Hypertrophic pyloric stenosis is more likely in some babies than in others, although the exact reason is not always clear. Some risks are carried inside the body, others come from the world around us. Knowing the main risk factors for hypertrophic pyloric stenosis can help families understand why doctors may watch some newborns more closely.
Hypertrophic pyloric stenosis is much more common in boys than in girls. The reason is not fully understood, but sex-related biological differences clearly affect risk.
This condition most often develops in the first few weeks of life, especially from about 2 to 8 weeks after birth. That narrow newborn period is when the muscle at the stomach outlet is most likely to become abnormally thickened.
First-born babies are affected more often than later-born siblings. This pattern has been seen in many studies, even though the exact cause is still uncertain.
Exposure to certain antibiotics, especially erythromycin or azithromycin, can raise the chance of hypertrophic pyloric stenosis. The risk appears highest when these medicines are given directly to a baby in the first 2 weeks after birth, but late-pregnancy exposure has also been linked.
Genetic risk factors
In hypertrophic pyloric stenosis, inherited factors matter, especially when the condition runs in a family. It’s usually a combination of influences rather than one clear cause. Most babies with hypertrophic pyloric stenosis do not have one single identified gene change, but several genetic risk factors for hypertrophic pyloric stenosis are well recognized. These risks raise the chance of the condition; they do not mean a baby will definitely develop it.
Family history: Hypertrophic pyloric stenosis is more common when a close relative, especially a parent or sibling, had it as a baby. That pattern suggests an inherited tendency, even though the exact genes can differ from family to family.
Many genes: In most babies, no single gene fully explains hypertrophic pyloric stenosis. Instead, small changes across several genes likely combine to affect how the stomach outlet muscle and nearby nerves develop.
Male sex: Hypertrophic pyloric stenosis is seen much more often in boys than in girls. This suggests that sex-related biology is part of the risk, although the full reason is still being studied.
Ancestry patterns: Rates of hypertrophic pyloric stenosis differ between populations, and it has been reported more often in people of Northern European ancestry than in some other groups. These patterns suggest that inherited background can influence risk, although ancestry alone cannot predict whether a baby will develop it.
Rare syndromes: A small number of babies with hypertrophic pyloric stenosis have a broader inherited condition that also affects growth or development. When pyloric stenosis appears along with other unusual findings, doctors may consider a rare genetic syndrome and whether genetic testing could help.
Lifestyle risk factors
Lifestyle habits do not cause hypertrophic pyloric stenosis, but day-to-day feeding and care practices can affect how quickly vomiting leads to dehydration, weight loss, and discomfort. In infants with this condition, how lifestyle affects hypertrophic pyloric stenosis is mainly through symptom management and how soon complications are recognized. The most important issues are feeding patterns, hydration, and prompt medical attention when symptoms are worsening.
Large feeds can stretch the stomach and may trigger more forceful vomiting in infants with hypertrophic pyloric stenosis. Smaller, more frequent feeds may reduce immediate stomach distension, but they do not fix the blockage.
Very rapid feeding can worsen discomfort and increase the chance of vomiting soon after a feed. Slower feeding with pauses may help some infants tolerate feeds slightly better while they are awaiting medical care.
Keeping the infant upright for a short time after feeding may lessen spit-up and improve comfort. This can help with symptom control, but persistent projectile vomiting still needs urgent assessment.
Gentle burping during and after feeds may reduce swallowed air and abdominal fullness. Less gastric distension can sometimes make feeding more comfortable, even though it does not change the underlying muscle thickening.
Risk prevention
Hypertrophic pyloric stenosis cannot usually be fully prevented, because it tends to develop in early infancy and is influenced by a mix of inherited and early-life factors. Still, some steps may help lower risk or help families spot feeding problems sooner. Prevention is about lowering risk, not eliminating it completely. Many living with a newborn who has forceful vomiting, poor weight gain, or fewer wet diapers may need prompt medical advice, since these can be early symptoms of hypertrophic pyloric stenosis.
Regular prenatal care supports overall pregnancy health and may reduce some avoidable risks linked to newborn illness. It also gives families a chance to review medicines, smoking, and feeding plans with a clinician.
Smoking during pregnancy has been linked to a higher chance of hypertrophic pyloric stenosis in some studies. Avoiding tobacco before and during pregnancy is a sensible way to lower risk.
Some medicines given late in pregnancy or during early infancy, especially certain antibiotics, may affect risk in a small number of babies. Parents should only use medicines for a newborn when advised by a clinician who knows the baby’s age and history.
Feeding choices should be based on what is safe and workable for the baby, but early support with feeding problems can help catch warning signs quickly. If a baby seems constantly hungry after vomiting or is not gaining weight, a clinician should review feeding and hydration.
Can you prevent Hypertrophic pyloric stenosis?
There is no sure way to prevent hypertrophic pyloric stenosis, a stomach-outlet blockage that can happen in young babies, because it seems to be caused by a mix of inherited and early-life factors. Risk may be lower in some cases by avoiding smoking during pregnancy and by using certain antibiotics for newborns only when clearly needed, since some have been linked with a higher chance of this problem. Even with these steps, it can still happen.
Transmission
Hypertrophic pyloric stenosis is not contagious, so it cannot be passed from one baby to another through touch, feeding, or close contact. Instead, it is a condition that develops in early infancy, and the chance of having it is partly linked to family history.
When people ask about the genetic transmission of hypertrophic pyloric stenosis, the answer is usually not a simple one-gene pattern. Several inherited factors may raise the risk, along with other early-life influences, so a baby may be more likely to develop it if a parent or sibling had it, but many babies with hypertrophic pyloric stenosis are still the first in their family to be affected.
When to test your genes
For hypertrophic pyloric stenosis, genetic testing is not usually used for early detection because diagnosis is made from symptoms and an ultrasound after birth. It may be worth discussing only if there is a strong family history, unusual features suggesting a broader genetic syndrome, or repeated cases in the same family.
Diagnosis
Hypertrophic pyloric stenosis is usually diagnosed after a baby develops repeated forceful vomiting, ongoing hunger after feeds, and trouble gaining weight. Doctors usually begin with the feeding history, vomiting pattern, and a careful exam, then confirm the diagnosis of hypertrophic pyloric stenosis with imaging. Some babies are diagnosed quickly, while others need a few tests to rule out other causes of vomiting.
The doctor asks when vomiting started, how often it happens, and whether it is forceful or happens after most feeds. They also check for fewer wet diapers, poor weight gain, and signs of dehydration.
During the exam, the doctor looks for weight loss, dry mouth, or unusual sleepiness from dehydration. Sometimes they can feel a small firm lump in the upper belly, which can strongly suggest hypertrophic pyloric stenosis.
An abdominal ultrasound is the main test used to confirm hypertrophic pyloric stenosis. It shows whether the muscle at the outlet of the stomach is thickened and blocking food from passing normally.
Blood tests help check for dehydration and changes in body salts caused by repeated vomiting. These results can support the diagnosis and help the care team prepare for treatment safely.
How is Hypertrophic pyloric stenosis diagnosed?
Hypertrophic pyloric stenosis is usually diagnosed based on a baby’s symptoms, especially repeated forceful vomiting after feeds, along with a doctor’s exam and signs such as poor weight gain or dehydration. The main test is an ultrasound, which uses sound waves to show whether the muscle at the outlet of the stomach has become too thick and is blocking food from passing through; blood tests may also be done to check for fluid and salt imbalance from vomiting. If the ultrasound result is not clear, doctors may use a special X-ray after the baby drinks a small amount of contrast liquid, and genetic testing is not usually needed to make the diagnosis.
Stages of Hypertrophic pyloric stenosis
Hypertrophic pyloric stenosis does not have defined progression stages. That is because it usually develops over a short period in young babies, with symptoms that gradually worsen, rather than moving through formal stages over years. Doctors usually start with a conversation about feeding, vomiting, weight gain, and wet diapers, since early symptoms of hypertrophic pyloric stenosis can look like common feeding problems at first. The diagnosis is usually confirmed with a physical exam and an ultrasound scan, and doctors also check for dehydration and salt imbalance with blood tests if needed.
Outlook and prognosis
The outlook for infants with hypertrophic pyloric stenosis is excellent, especially when it is recognized early and treated promptly. Before surgery, dehydration, electrolyte imbalance, and poor weight gain can make a baby appear quite ill, but these problems usually improve quickly with intravenous fluids and correction of salts. After pyloromyotomy, most babies tolerate feeds within a short time and go on to have normal growth and development without long-term digestive problems. Recurrence is very uncommon, and lasting complications are rare when treatment is provided by an experienced pediatric surgical team. Mortality is now very low in settings with timely access to diagnosis, rehydration, and surgery, although delayed treatment can increase the risk of serious illness. Overall, the long-term prognosis is excellent, with most children making a full recovery.
Long-term effects
For most babies with hypertrophic pyloric stenosis, the long-term outlook is very good once the blockage is treated. Most go on to feed, grow, and develop normally, without ongoing stomach problems. It’s important to remember that long-term does not always mean progressive, and this condition usually does not cause worsening problems over time after treatment.
Once feeding is restored, most infants catch up well with weight gain and hydration. Over time, growth is usually the same as in children who never had hypertrophic pyloric stenosis.
In the weeks after treatment, some babies still spit up or take time to settle into regular feeds. These early symptoms of hypertrophic pyloric stenosis usually do not continue long term.
The stomach outlet usually works normally after recovery, so lasting vomiting or poor emptying is uncommon. Most children do not have chronic digestive trouble related to the condition itself.
When dehydration and salt imbalance are corrected promptly, long-term brain and physical development are expected to be normal. Lasting effects from the illness are uncommon in babies treated in time.
How is it to live with Hypertrophic pyloric stenosis?
Living with hypertrophic pyloric stenosis usually means an infant has forceful vomiting after feeds, stays hungry, and may lose weight or become dehydrated, so daily life quickly shifts from normal feeding routines to frequent medical visits and careful monitoring. For families, this can be exhausting and frightening, because feeding becomes stressful and caregivers often need to watch for fewer wet diapers, poor weight gain, or unusual sleepiness. The reassuring part is that once the blockage is treated, most often with a small surgery, most babies recover well and feeding and growth usually get back on track.
Treatment and drugs
With hypertrophic pyloric stenosis, feeding can quickly turn into repeated forceful vomiting, so treatment focuses first on keeping the baby safe, hydrated, and able to eat normally again. Doctors usually begin by giving fluids and salts through a vein to correct dehydration and any chemical imbalance in the blood before surgery. The main treatment for hypertrophic pyloric stenosis is a small operation that splits the tight muscle at the outlet of the stomach so milk can pass through more easily; this is called pyloromyotomy. Treatment often looks different for each person, but in most babies this surgery works very well, and feeds are restarted gradually afterward, even though some vomiting can continue for a day or two. If you are reading about early symptoms of hypertrophic pyloric stenosis, prompt medical care is important because this condition does not usually get better with medicines alone.
Can you cure Hypertrophic pyloric stenosis?
Yes. Hypertrophic pyloric stenosis is usually effectively cured with a short operation that opens the blocked outlet of the stomach, and most babies recover fully after it. Before surgery, the medical team often gives fluids and corrects salt levels to make treatment safer, but medicines alone do not fix the problem.
Non-drug treatment
Hypertrophic pyloric stenosis usually affects young babies who vomit forcefully after feeds and can quickly become dehydrated, so treatment often starts in the hospital. The main approach is to first make sure the baby is safe and hydrated, then relieve the blockage with a procedure rather than medicine. For many, treatment begins not at the pharmacy, but with fluids, careful monitoring, and surgery to help milk pass from the stomach into the intestine again.
Babies with hypertrophic pyloric stenosis often need fluids through a vein to treat dehydration and correct salt imbalances caused by repeated vomiting. This is the key first step before surgery and helps make anesthesia safer.
Some babies need a thin tube into the stomach to remove trapped milk and air before the procedure. This can reduce vomiting and make your baby more comfortable while the team prepares for treatment.
The standard treatment is a small operation called pyloromyotomy, which splits the overgrown stomach muscle so food can move through normally. This is the most effective treatment for hypertrophic pyloric stenosis and is usually done through a small cut or with laparoscopic surgery.
After surgery, feeds are usually started again gradually, often beginning with small amounts and increasing as tolerated. Mild vomiting can still happen for a short time, but most babies soon feed much better.
Your genes may have an impact on how drugs work for you
Hypertrophic pyloric stenosis is usually treated with fluids to correct dehydration and then surgery, so there are not many everyday medicines used long term for this condition. In some babies, inherited differences can still affect how the body handles medicines given around surgery, such as anesthesia or pain relief, which may change how strongly a medicine works or how long it lasts. If there is a family history of unusual reactions to anesthesia or medicines, telling the care team can help them choose the safest options and watch your baby closely.
Pharmacological treatments
For hypertrophic pyloric stenosis, medicine is usually used to stabilize a baby before the main treatment, which is surgery. The most common drugs are given through a vein to correct dehydration and low salt levels caused by repeated vomiting. Sometimes medicines are taken short-term (acute treatment), while others are used long-term; in this condition, drug treatment is usually short-term, and atropine is used only in selected cases when surgery is delayed or not possible.
Normal saline, dextrose, and potassium chloride are commonly used to replace lost fluid and correct salt and acid-base problems before surgery. This is a key part of treatment for hypertrophic pyloric stenosis because vomiting can quickly lead to dehydration and weakness in young babies.
Atropine can relax the pyloric muscle and may be used by mouth or through a vein in some babies when surgery is not an option or must be postponed. It is used far less often than surgery and usually requires close hospital monitoring and follow-up.
Genetic influences
When a baby vomits forcefully after feeds and still seems hungry, many families wonder why hypertrophic pyloric stenosis happened and whether it could happen again. Genetics appear to play a real role, but this condition is usually not caused by a single inherited gene change on its own. It’s natural to ask whether family history plays a role, and the risk is higher if a parent or sibling had hypertrophic pyloric stenosis as an infant. Researchers think several genes may slightly raise risk by affecting how the stomach outlet muscle grows and tightens, while other factors before and after birth may also contribute. That is why some babies develop the condition with no known family history, while others seem to have it run in the family. Understanding this genetic tendency can help when talking with your child’s doctor about the chances in future children or when reviewing the early symptoms of hypertrophic pyloric stenosis.
Is Hypertrophic pyloric stenosis genetic?
Genetics matter in hypertrophic pyloric stenosis, but they are only part of the picture. Common genetic variations can raise risk, and hypertrophic pyloric stenosis often runs in families, yet sex, early feeding patterns, and some medicines may also contribute.
Having a genetic risk is not necessarily a diagnosis
Gene variants are a normal and common part of human biology. Most of these variants do not directly affect health and are simply part of natural human diversity. For many genes, having a variant associated with a condition suggests a possible link rather than a definite diagnosis, especially when several genes and environmental factors are involved. In some cases, though, a single well-understood variant in a specific gene is enough to confirm a diagnosis.
Pharmacogenetics—how genetics influence drug effects
For most babies with hypertrophic pyloric stenosis, treatment is guided more by how dehydrated they are from vomiting than by their genes. Doctors usually first replace fluids and body salts through a vein, then treat the blocked stomach outlet with a small operation called pyloromyotomy. Genetics is only one factor, and in hypertrophic pyloric stenosis there is no routine genetic test that tells doctors which medicine will work best or whether surgery will be needed. In the uncommon cases when medicine is used instead of surgery, such as atropine in selected babies, genetic testing is not a standard part of choosing that treatment. So when families ask how genetics affect treatment for hypertrophic pyloric stenosis, the main answer is that genes may help explain who develops the condition, but they rarely change the usual treatment plan.
Interactions with other conditions
In daily life, hypertrophic pyloric stenosis often shows up as forceful vomiting after feeds, and that can quickly lead to dehydration and low levels of body salts such as chloride and potassium. Having more than one diagnosis can make symptoms feel harder to untangle, because vomiting in a young baby can also happen with reflux, stomach infections, milk protein allergy, or problems elsewhere in the intestines. For many living with hypertrophic pyloric stenosis, the main medical concern is not that it causes many other diseases, but that it can trigger complications like weight loss, constipation, and an imbalance in the body’s acid-base chemistry if treatment is delayed. Early symptoms of hypertrophic pyloric stenosis can also overlap with common feeding problems, so doctors usually look carefully for signs of dehydration and poor growth while ruling out other causes. Once the narrowed outlet of the stomach is treated, these related problems usually improve, and most babies recover well.
How genes can cause diseases
Humans have more than 20,000 genes, each carrying out one or a few specific functions in the body. One gene instructs the body to digest lactose from milk, another tells the body how to build strong bones and another prevents the body's cells from beginning to multiply uncontrollably and developing into cancer. As all of these genes combined are the building instructions for our body, a defect in one of these genes can have severe health consequences.
Through decades of genetic research, we know the genetic code of any healthy/functional human gene. We have also identified that in certain positions on a gene, some individuals may have a different genetic letter from the one you have. We call these hotspots "Genetic Variations" or "Variants" in short. In many cases, studies have been able to show that having the genetic letter "G" in the position makes you healthy, but having the letter "A" in the same position disrupts the gene function and causes a disease. Genopedia allows you to view these variants in genes and summarizes all that we know from scientific research, which genetic letters (Genotype) have good or bad consequences on your health or on your traits.
What other conditions can cause similar symptoms to Hypertrophic pyloric stenosis?
In babies, vomiting that looks like hypertrophic pyloric stenosis can also be caused by reflux, a milk protein allergy, a stomach infection, or another blockage in the stomach or intestines. Doctors are especially careful to rule out urgent problems such as an intestinal twist or blockage, especially if the vomit is green, the belly looks swollen, or the baby seems unusually sleepy or unwell.
History
For families, hypertrophic pyloric stenosis has long been one of those conditions that can turn an ordinary feeding routine into a stressful cycle of hunger, vomiting, and worry. A baby may seem eager to feed, then vomit forcefully soon afterward and still act hungry. Long before modern scans and surgery, doctors and parents recognized this pattern, even if they did not yet understand exactly what was causing it.
In recent decades, awareness has grown, but the condition was described in medical writing well over a century ago as doctors began linking repeated vomiting in young infants to a narrowed outlet of the stomach. Early descriptions were based on what could be seen and felt during an exam, such as weight loss, dehydration, or a small firm lump in the upper belly. As medical science evolved, surgeons developed operations to treat the blockage more safely, and outcomes improved dramatically.
The history of hypertrophic pyloric stenosis also reflects the broader story of child health care. At first, many infants became dangerously ill before the problem was recognized, especially when the early symptoms of hypertrophic pyloric stenosis were mistaken for ordinary spit-up or feeding intolerance. Over time, better hospital care, safer anesthesia, and improved fluid treatment made a major difference, so babies could be stabilized before surgery rather than treated only after severe dehydration had developed.
Later research helped explain that hypertrophic pyloric stenosis is not caused by anything a parent did during feeding or care. Imaging, especially ultrasound, made diagnosis much quicker and less invasive, often replacing the need for doctors to rely only on physical findings. Today, the condition is usually identified early and treated effectively, which is a very different picture from the past, when the same symptoms could remain a mystery for far too long.