Adult pineoblastoma is a rare, fast-growing brain tumor that starts in the pineal region. People with adult pineoblastoma may have headaches, nausea, balance problems, or vision changes, and doctors may see fluid buildup in the brain. It tends to progress quickly without treatment, and symptoms can worsen over weeks to months. Adults are affected less often than children, but it can occur at any age and can be life-threatening. Treatment usually includes surgery when possible, followed by radiation and chemotherapy, and close follow-up.
Overview
Adult pineoblastomaSymptoms
Early symptoms of adult pineoblastoma often stem from pressure in the brain: worsening headaches, morning nausea or vomiting, blurred or double vision, and trouble looking upward. Some also notice sleep disruption, balance problems, or memory and mood changes.
Outlook and prognosis
Adult pineoblastoma is aggressive, but outcomes vary with tumor size, spread, and how fully surgeons can remove it. Modern care—microsurgery, craniospinal radiation, and multi‑agent chemotherapy—has improved survival for some adults. Close MRI follow‑up helps catch recurrences early.
Causes and risk factors
Adult pineoblastoma arises from genetic changes in tumor cells; causes are mostly unknown. Risk factors for adult pineoblastoma include rare inherited variants in RB1 or DICER1 and prior cranial radiation. No proven lifestyle risks; most cases occur sporadically.
Genetic influences
Genetics plays a meaningful role in adult pineoblastoma, though it’s less defined than in children. Some cases involve inherited changes in RB1 or DICER1, and rare cancer-predisposition syndromes. Tumor genetic testing can guide prognosis, surveillance, and treatment choices.
Diagnosis
Doctors suspect Adult pineoblastoma when brain MRI shows a pineal-region mass with pressure-related symptoms. Definitive diagnosis of Adult pineoblastoma comes from surgical or biopsy tissue pathology, with spinal fluid testing and spine MRI used to check spread.
Treatment and drugs
Treatment for adult pineoblastoma often combines brain surgery to remove as much tumor as safely possible, followed by targeted radiation to the pineal region and craniospinal axis, and chemotherapy to lower recurrence risk. Care teams tailor plans to tumor size, spread, and overall health. Supportive care—steroids for swelling, anti-nausea medicines, and rehabilitation—helps manage symptoms and treatment side effects.
Symptoms
Adult pineoblastoma often shows up through changes you feel in daily life, like morning headaches, vision problems, and trouble with balance. Early symptoms of adult pineoblastoma usually come from pressure building in the brain or from nearby eye-movement pathways being compressed. Symptoms vary from person to person and can change over time.
In adult pineoblastoma, headaches are often worse in the morning or when bending over. They can feel like a deep, steady pressure behind the eyes or at the top of the head. Clinicians call this hydrocephalus, which means fluid buildup raising pressure inside the skull.
Feeling sick to your stomach can come with the headaches. Vomiting may happen suddenly after waking or with quick movements. These symptoms often ease when the pressure is treated.
Blurry or double vision can develop, especially when looking up or switching focus. Bright lights may bother your eyes more than usual. Loved ones often notice the changes first.
Trouble looking upward or shifting focus between near and far can sneak up. In medical terms, this is vertical gaze palsy; in everyday life, it shows up as needing to move your head more to track objects. You might also notice jerky eye movements.
How people usually first notice Adult pineoblastoma?
Many people first notice adult pineoblastoma when headaches become frequent and stronger, often worse in the morning or when coughing or bending, sometimes with nausea or vomiting from pressure building inside the skull. Vision changes—such as double vision, trouble looking up, or brief episodes of blurry vision—can be early clues, and some notice balance problems, sleepiness, or unusual behavior or thinking changes. A sudden, severe headache, new seizures, or rapidly worsening vision or balance are urgent warning signs to seek immediate medical care.
Types of Adult pineoblastoma
Adult pineoblastoma is rare, and information often comes from small studies or experience with pediatric cases. Researchers describe a few clinical variants that reflect differences seen under the microscope and in tumor genetics, which can influence how the cancer behaves and responds to treatment. Not everyone will experience every type. When people talk about types of adult pineoblastoma, they often mean one of these kinds that pathologists and neuro-oncologists recognize.
Molecular subgroups
Some tumors show signature genetic patterns that suggest faster growth, while others look slightly less aggressive. These patterns may guide clinical trial choices in the future. Variants of adult pineoblastoma can differ in early symptoms and risk of spread.
Pinealoblastoma with RB loss
Tumors with changes affecting the RB pathway tend to behave more aggressively. People may present with headaches, vision changes, or fluid buildup in the brain due to blocked flow.
MYC/MYCN-amplified
Tumors with extra copies of MYC or MYCN genes usually grow and spread more quickly. This variant often requires intensive treatment and close follow-up of the brain and spine.
DICER1-related
In some adults, the tumor arises in the setting of a DICER1 gene change, sometimes as part of DICER1 syndrome. Family history of certain rare tumors may prompt genetic counseling and testing.
Multinodular growth pattern
A subset shows multiple small tumor nodules within the pineal region or along cerebrospinal fluid pathways. This pattern can increase the chance of spread within the brain and spine and may influence radiation planning. Here are the main types to know about:
What genetics can tell you about symptoms
Some people with adult pineoblastoma carry RB1 or DICER1 changes, which can make tumors grow faster and raise the chance of headaches, nausea, balance problems, or vision changes. These variants influence how early symptoms appear and how aggressive the cancer behaves.
Causes and risk factors
The exact cause of adult pineoblastoma is not clear. Some cases are linked to inherited gene changes, such as RB1 or DICER1, or a family history of hereditary retinoblastoma. In many adults, the tumor seems to arise from new changes in pineal gland cells with no family history or known trigger. There are no proven lifestyle or environmental risk factors, so known risk factors for adult pineoblastoma focus mainly on genetics. Genetic testing can sometimes clarify your personal risk.
Environmental and biological risk factors
Adult pineoblastoma is a very rare brain cancer, so most adults never face it. People often ask about environmental causes of adult pineoblastoma, but the list of well-established risks is short. Being exposed to risks in your body or environment doesn’t mean illness is inevitable. What we do know mainly involves ionizing radiation and how sensitive brain tissue is at different ages.
Exposure to high doses of ionizing radiation to the head can increase the chance of brain tumors, occasionally including the pineal region. This is most often from past radiation therapy for another condition. Risk generally rises with total dose.
The developing brain is more vulnerable to radiation than the adult brain. People who received cranial radiation in childhood or adolescence carry a small, higher lifetime risk of later brain tumors, including rare ones like adult pineoblastoma. For any one person, the absolute risk remains low.
Jobs or accidents that involve substantial ionizing radiation can increase cancer risk if protections fail. Modern safety standards aim to keep exposures well below levels linked to brain tumors. Workers with tracked exposures should follow workplace monitoring and medical guidance.
CT scans and X-rays deliver much lower radiation doses than cancer therapy. Current studies have not shown a clear link between routine diagnostic imaging and adult pineal tumors. MRI does not use ionizing radiation.
Genetic risk factors
Most cases of Adult pineoblastoma appear to happen by chance, but a small share are linked to inherited changes in certain genes. The best studied genetic risk factors for Adult pineoblastoma involve RB1 (hereditary retinoblastoma) and DICER1 syndrome, while many tumors also carry acquired changes in genes that guide microRNA signals. Carrying a genetic change doesn’t guarantee the condition will appear. Genetic counseling can help clarify which risks are relevant for you and your family.
RB1 changes: Inherited changes in the RB1 gene raise the chance of Adult pineoblastoma and other pineal tumors. The risk is highest in childhood but can persist into adulthood for those with a history of hereditary retinoblastoma.
DICER1 syndrome: An inherited DICER1 change increases the likelihood of pineoblastoma and other DICER1-related tumors across the body. Risk varies widely, even within the same family. Genetic testing is often considered when personal or family history suggests this syndrome.
Tumor gene changes: Many Adult pineoblastomas show acquired changes in genes that help cells manage tiny RNA signals, such as DICER1, DROSHA, or DGCR8. These are found in the tumor itself rather than inherited, and they act as direct genetic causes.
Family history: Patterns like early eye cancer (retinoblastoma), thyroid lumps, or rare childhood lung or kidney tumors in close relatives can signal an inherited syndrome tied to pineoblastoma risk. A genetics specialist can review your family tree and advise on targeted testing.
Lifestyle risk factors
Evidence to date does not identify clear lifestyle risk factors for Adult pineoblastoma. Because the tumor is rare, research on how lifestyle affects Adult pineoblastoma is limited, and no consistent links with diet, exercise, alcohol, or smoking have been shown. Still, daily habits can influence treatment tolerance, recovery, and quality of life.
No studies show smoking increases the risk of Adult pineoblastoma. Quitting still supports lung and vascular health, which can help you tolerate neurosurgery, radiation, or chemotherapy.
There is no evidence that alcohol use changes the chance of developing Adult pineoblastoma. Heavy drinking can complicate recovery and interact with medications used during treatment.
No specific foods are known to raise or lower Adult pineoblastoma risk. A balanced, protein-rich diet can help maintain strength and manage treatment side effects such as nausea or weight loss.
Exercise has not been shown to alter the risk of Adult pineoblastoma. Light-to-moderate activity can improve fatigue, mood, and functional recovery during and after therapy.
Risk prevention
There isn’t a proven way to fully prevent adult pineoblastoma, but you can lower avoidable risks and aim for early detection if you’re in a higher‑risk group. Prevention is about lowering risk, not eliminating it completely. For some, especially those with certain inherited risks, planning with a specialist can include genetic counseling and tailored brain imaging. Staying alert to new, persistent neurologic symptoms and minimizing unnecessary radiation to the head can also help.
Share any family history of retinoblastoma, DICER1 syndrome, or rare brain tumors with your doctor. This can flag higher risk for adult pineoblastoma and guide next steps.
If there’s a suggestive family history, a genetics team can review risks and discuss testing. Results can shape a plan to watch for adult pineoblastoma and related tumors.
For people with confirmed inherited risk, specialists may recommend periodic brain MRI. Early detection of adult pineoblastoma can improve treatment options. Screenings and check-ups are part of prevention too.
Ask whether MRI (no radiation) is suitable instead of a CT when appropriate. Avoiding unnecessary head radiation may reduce lifetime risk without compromising needed care.
Transmission
Adult pineoblastoma cannot be spread from person to person; it isn’t infectious and doesn’t pass through everyday contact, coughing, sex, or sharing items. It develops when cells in the pineal gland change over time, not because of a germ or exposure to someone else with the tumor.
Most adults have no inherited risk identified, though rarely a family gene change that raises risk can be present in certain cancer syndromes. If you’re worried about how Adult pineoblastoma is inherited, know there is no genetic transmission of Adult pineoblastoma itself—at most, a rare predisposition can be passed down, which a genetics professional can help assess.
When to test your genes
Consider genetic testing at diagnosis, before starting treatment, or if there’s a family history of eye or brain tumors at young ages, especially retinoblastoma. Testing can uncover inherited risks (like RB1) and tumor mutations that guide surgery, radiation, and chemotherapy choices. It also informs screening for second cancers and helps relatives decide if they should be tested.
Diagnosis
Early clues often come from symptoms like worsening headaches, nausea, vision changes, or sleep–wake disruption that prompt brain imaging and a specialist visit. From here, the focus shifts to confirming or ruling out possible causes. In adults, how adult pineoblastoma is diagnosed usually involves a combination of brain scans, eye and neurologic exams, and a tissue sample. Tests also look for tumor spread in the brain or spine and help distinguish it from other pineal region tumors.
A clinician checks memory, balance, strength, reflexes, and eye movements. These findings help spot pressure effects or signs that the pineal region may be involved.
An MRI with contrast creates detailed pictures of the pineal region and nearby structures. It helps show tumor size, shape, and whether it is pressing on fluid pathways or nearby brain tissue.
A CT scan can quickly show bleeding, calcium patterns, or fluid build-up. It is often used in urgent settings and complements MRI findings in adult pineoblastoma.
An eye specialist may assess for upward gaze problems, double vision, or light–near response changes. These features can occur when a pineal mass affects midbrain pathways.
Stages of Adult pineoblastoma
Adult pineoblastoma does not have defined progression stages. Instead, doctors describe it by how aggressive the tumor looks under the microscope and whether it has spread through the brain or spinal fluid, which can vary from person to person. Different tests may be suggested to help show where the tumor is and whether it has traveled, including MRI scans of the brain and spine, a spinal tap (lumbar puncture) to check spinal fluid, and sometimes surgery to confirm the diagnosis. If you’re watching for early symptoms of adult pineoblastoma, headaches, vision changes, balance problems, or morning nausea can prompt an evaluation, followed by regular imaging to monitor how treatment is working.
Outlook and prognosis
Looking at the long-term picture can be helpful. Adult pineoblastoma is rare, and outcomes vary based on tumor size, spread at diagnosis, and how well it responds to surgery, radiation, and chemotherapy. Many people ask, “What does this mean for my future?”, and it often depends on whether the tumor was fully removed and if cancer cells reached the spinal fluid. Adults tend to do a bit better than children with the same tumor type, but the disease can still be aggressive. When doctors talk about “remission,” they mean symptoms have eased or disappeared for a while, and close MRI follow‑up is key because recurrences most often happen within the first few years.
The outlook is not the same for everyone, but those diagnosed at an early stage and treated at centers experienced with brain tumors generally have higher chances of long-term control. Some people experience headaches, balance issues, or vision changes as early symptoms of adult pineoblastoma, while others notice subtle memory or concentration problems first; treating the tumor promptly gives the best shot at preserving function. If the tumor has already spread through the cerebrospinal fluid at diagnosis, survival rates are lower and treatment courses are longer. Mortality is still significant with adult pineoblastoma compared with more common brain tumors, yet durable survival for five years or more is possible—especially after gross total resection plus craniospinal radiation and multi‑agent chemotherapy.
With ongoing care, many people maintain independence in daily life, though fatigue, slowed thinking, or hormonal changes may linger after treatment. Rehabilitation, neuropsychology, and endocrine follow‑up can lessen long-term effects and help people return to work or school. Talk with your doctor about what your personal outlook might look like, including how tumor features, treatment response, and your overall health shape your prognosis and the plan for surveillance scans.
Long-term effects
Adult pineoblastoma and its treatment can leave lasting effects that touch thinking, movement, senses, energy, and hormones. Early symptoms of adult pineoblastoma, like persistent headaches or vision changes, often improve with treatment, but some long-term effects can remain. Long-term effects vary widely and depend on tumor location, spread in the spinal fluid, and the type of surgery, radiation, and chemotherapy used. Follow-up imaging and checkups help spot changes early.
Problems with attention, processing speed, and short-term memory can linger after treatment. This may make multitasking or learning new information feel slower.
Double vision, difficulty looking up, or light sensitivity can persist when the pineal region or nearby pathways are affected. Reading and screen time may be tiring.
Unsteadiness, veering when walking, or clumsiness can follow surgery or radiation near midbrain and cerebellar pathways. Stairs, uneven ground, or quick turns may feel less secure.
Ongoing headaches can occur, especially if there was hydrocephalus before treatment. Some people remain shunt-dependent and may face shunt malfunctions over time.
How is it to live with Adult pineoblastoma?
Living with adult pineoblastoma often means navigating cycles of headaches, vision changes, fatigue, and the stop‑and‑start rhythm of surgery, radiation, and chemotherapy, with checkups becoming part of the calendar. Day-to-day life can be shaped by short-term effects like nausea or hair loss and longer-lasting challenges such as memory lapses, slower processing speed, balance problems, or mood shifts, which can affect driving, work, and independence. Many lean on family and friends for rides, reminders, and emotional steadiness, and loved ones may feel their own mix of worry, hope, and caregiver strain. Supportive care—rehabilitation, neuropsychology, social work, and peer groups—helps people rebuild routines, set realistic goals, and protect quality of life for everyone involved.
Treatment and drugs
Treatment for adult pineoblastoma usually combines surgery, radiation therapy, and chemotherapy. Surgeons aim to remove as much of the tumor as safely possible, then radiation to the brain and sometimes spine targets remaining cancer cells, and chemotherapy helps lower the risk of the tumor coming back. Doctors sometimes recommend a combination of lifestyle changes and drugs, and you may also receive medicines to control headaches, nausea, or seizures, plus steroids to reduce swelling. If first-line treatments don’t help, specialists may try second-line options such as different chemotherapy combinations or clinical trials. Not every treatment works the same way for every person, so your care team will tailor the plan to your tumor features, overall health, and goals.
Non-drug treatment
Living with Adult pineoblastoma often involves treatments that reduce pressure in the brain, control the tumor, and protect day-to-day function. Beyond prescriptions, supportive therapies can ease symptoms, speed recovery, and help you stay engaged in work, family, and activities you enjoy. Care is usually planned by a multidisciplinary team so each step fits your goals and life. The options below are commonly used alongside any needed medicines or chemotherapy.
Surgeons remove as much tumor as safely possible to relieve pressure and guide next steps. In Adult pineoblastoma, the aim is tumor control while protecting thinking, movement, and vision.
High-energy beams treat remaining cancer cells and reduce the chance of spread. For Adult pineoblastoma, craniospinal radiation may be recommended to cover the brain and spinal fluid pathways.
Proton beams can limit radiation to nearby healthy tissue compared with standard X‑rays. This may reduce side effects in adults, depending on tumor shape and location. Availability can vary by center.
Very focused radiation is delivered in one to five sessions to small targets. It may be used for residual spots or recurrences in Adult pineoblastoma. Despite its name, it does not involve an incision.
Your genes may have an impact on how drugs work for you
Some medicines for adult pineoblastoma work differently depending on inherited and tumor-specific gene changes that affect how drugs are processed or how cancer cells respond. Doctors may use tumor profiling and, in some cases, pharmacogenetic clues to guide dosing and choose targeted therapies.
Pharmacological treatments
Pharmacological care for adult pineoblastoma usually combines multi-drug chemotherapy with radiation after surgery. Regimens are often adapted from medulloblastoma and use platinum agents with other drugs such as etoposide and vincristine. Not everyone responds to the same medication in the same way. Your oncology team individualizes timing and combinations based on tumor spread, spinal fluid results, and recovery after surgery.
Cisplatin or carboplatin damage tumor DNA and are core drugs for adult pineoblastoma. They’re often given with etoposide and vincristine after radiation or between radiation cycles. Hearing, kidney, and nerve checks help catch side effects early.
This drug blocks cancer cell division and is commonly paired with a platinum drug in adult pineoblastoma. It is given in cycles, with blood counts watched for low white cells. Nausea and hair thinning can occur.
Added to combination regimens to slow tumor growth. It is given weekly during some cycles and can cause numbness or tingling in hands and feet. Dosing may be increased or lowered gradually to balance benefit and side effects.
These alkylating drugs are sometimes used in multi-agent plans. Extra hydration and mesna help protect the bladder. Blood counts and kidney function are monitored during therapy.
Genetic influences
Many adults diagnosed with this tumor wonder what it means for their relatives. Adult pineoblastoma is usually not inherited; most cases arise on their own without a family link. A smaller share occurs as part of a hereditary cancer syndrome, most often DICER1 syndrome and, rarely, inherited RB1 changes related to retinoblastoma. When there’s a personal or family history of DICER1‑related tumors, early eye cancer, or multiple relatives with related conditions, doctors may suggest genetic counseling and consider testing. Even if no inherited cause is found, the tumor itself may carry DNA changes that developed only in the cancer cells and aren’t passed down. Having a gene change doesn’t always mean you will develop the condition. Questions like “is adult pineoblastoma hereditary?” are common; a genetics visit can help you understand your own risk and what this might mean for your family.
Is Adult pineoblastoma genetic?
Genetics plays a meaningful role in adult pineoblastoma, though it’s less defined than in children. Some cases involve inherited changes in RB1 or DICER1, and rare cancer-predisposition syndromes. Tumor genetic testing can guide prognosis, surveillance, and treatment choices.
Pharmacogenetics—how genetics influence drug effects
For Adult pineoblastoma, both the tumor’s DNA and, for some, inherited gene changes can shape treatment. Molecular testing of the tumor can suggest how aggressive it is and whether certain targeted medicines or a clinical trial might be an option, though no single lab result guarantees benefit. Some inherited cancer syndromes may also influence how doctors plan radiation and chemotherapy to limit the risk of second cancers over time. Genes can influence how quickly you process some chemotherapy medicines, which can change the dose you need and your chance of side effects. Because evidence in adults is still growing, pharmacogenetic testing isn’t routine everywhere, but some centers use it to help fine‑tune dosing and to anticipate side effects during intensive chemotherapy. Talk with your care team about tumor profiling and pharmacogenetic testing for Adult pineoblastoma to see whether it could inform your plan or open trial options.
Interactions with other conditions
Living with adult pineoblastoma can also mean juggling other health issues that affect how you feel day to day, such as sleep problems or migraine, which can make symptoms blur together. Early symptoms of adult pineoblastoma can overlap with conditions like chronic migraine or anxiety, so headaches, sleep–wake changes, or vision trouble may be attributed to something else until imaging clarifies the cause. People with a personal or family history of hereditary retinoblastoma or a condition called DICER1 syndrome face a higher chance of also developing tumors in the pineal region. Shared genetic variants may explain why certain conditions cluster together. During treatment, steroids used to reduce brain swelling can worsen diabetes control, raise blood pressure, and heighten infection risk, while chemotherapy can interact with kidney or liver disease and medicines like blood thinners. Radiation to the brain may compound existing memory or mood disorders, and vision issues are harder to manage when glaucoma or retinal disease is also present, so care plans often need to be tailored across specialties.
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.
History
Throughout history, people have described sudden changes in vision, balance, and severe headaches that came on without warning—symptoms that we now recognize can be early signs of adult pineoblastoma. In diaries and clinic notes from the 19th and early 20th centuries, doctors wrote about adults with pressure headaches worse in the morning, double vision on looking to the side, and bouts of nausea that didn’t fit common causes. Without brain scans, many of these cases were grouped under broad labels like “intracranial tumor,” and the exact origin deep in the pineal region went unrecognized.
First described in the medical literature as aggressive tumors of the pineal area primarily in children, pineoblastoma in adults sat at the margins of attention for decades. Early surgeons approached these deep-seated growths with great caution because the region is surrounded by delicate structures that control eye movements, hormone signals, and the flow of cerebrospinal fluid. Many adults were diagnosed only at autopsy, when the tumor’s location and fast-growing features became clear under the microscope.
As medical science evolved, pneumoencephalography and angiography offered the first indirect clues—blocked fluid pathways and shifted blood vessels hinted at a mass near the brain’s center. The arrival of CT in the 1970s and MRI in the 1980s changed the picture. Radiologists could finally see tumors arising from the pineal region and distinguish them from other nearby growths. Pathology also advanced: what looked similar under light microscopy could be separated using immunostains and, later, molecular markers, helping confirm pineoblastoma and revealing that adult cases, while uncommon, do occur.
With each decade, treatment history followed technology. Earlier eras relied on shunts to relieve pressure and limited radiation fields. Microsurgical techniques, neuro-navigation, and safer anesthesia expanded what could be removed. Multimodal care—surgery, craniospinal irradiation, and chemotherapy—emerged from pediatric protocols, and adult neuro-oncology adapted these approaches while studying differences in tolerance and outcomes for grown adults.
Advances in genetics added another layer. Researchers identified patterns that link some pineoblastomas to changes in tumor-suppressor genes and, in rare families, to inherited risks affecting the retina and pineal region. These insights helped explain why a fast-growing tumor might appear in adulthood and guided discussions about screening in select situations. Not every early description was complete, yet together they built the foundation of today’s knowledge.
In recent decades, awareness has grown as more adult cases of pineoblastoma have been collected in registries and reported in detail. This has refined how doctors stage the disease, plan radiation fields, and anticipate spread through the fluid around the brain and spinal cord. Looking back helps explain why adult pineoblastoma was once considered an outlier: it was hidden by limited imaging, blended with other tumor types, and overshadowed by pediatric cases. Today’s care builds on that history, aiming for faster diagnosis, more precise treatment, and better long-term support for adults living with this rare brain tumor.