is a birth defect lacking colonic nerve cells, causing intestinal blockage.

is a rare inherited disorder causing bowel blockage, deafness, and extra digits.

is a rare genetic condition affecting bowel nerves and increasing tumor risk.

is a rare genetic condition causing bowel blockage, underdeveloped nails, and dysmorphism.

is a rare genetic condition causing intestinal blockage and short thumbs.

is a rare fast heart rhythm arising from the heart's conduction system.

is a rare inherited disorder affecting how the body breaks down histidine.

is a rare inherited metabolic condition causing high histidine, usually asymptomatic.

is a rare inherited condition affecting histidine metabolism and kidney tubule function.

is a rare cancer affecting immune cells called histiocytes and dendritic cells.

is a rare cancer affecting immune cells called histiocytes or dendritic cells.

is a rare, aggressive cancer that starts in immune system cells.

is a rare heart disease that can cause dangerous abnormal rhythms.

is a rare, usually benign blood vessel growth in the skin.

is a usually benign skin growth made of immune system cells.

is a rare disorder where abnormal immune cells build up in tissues.

is a rare genetic disorder causing immune-cell overgrowth and lymph node enlargement.

is a rare tumor driven by changes in histone genes.

is a fungal infection, usually affecting the lungs after breathing spores.

is a fungal infection of the brain and spinal cord lining.

is a fungal infection causing inflammation of the sac around the heart.

is an eye infection linked to histoplasmosis that can damage vision.

is a mental health condition marked by intense emotions and attention-seeking behavior.

is cancer linked to HIV, often due to weakened immunity.