| Description | Disease | Letter |
| A common form of dementia, usually beginning in late middle age, characterized by progressive loss of mental ability. | |
| Drooping in one side of the face due to malfunction of the facial nerve and inability to control the affected muscles. | |
| Condition caused by excess corticosteroid hormones in the body, characterized by obesity of the trunk and face. | |
| Congenital disorder caused by the presence of an extra 21st chromosome causing mild mental retardation and a flattened facial profile. | |
| Disorder that affects collagen structure and function, forming abnormally weak connective tissues and hyperextensible skin. | |
| Inherited disorder affecting blood which leads to bone marrow failure and increased sensitivity to DNA cross-linking agents. | |
| Autoimmune disease which affects the thyroid, causing it to enlarge and become overactive, with bulging eyes seen in some patients. | |
| Nervous disorder with symptoms including progressive dementia and involuntary movements, usually appearing in the fourth decade of life. | |
| Peripheral nerve disease which causes hyperactivity of the muscles, cramping, and rippling muscle movements. | |
| A type of incurable and fatal transmissible spongiform encephalopathy in humans similar to 'mad cow disease'. | |
| Lack of thiamine (Vitamin B1) in the brain causing anterograde amnesia and tendency for confabulation, often seen in chronic alcoholism. | |
| Disease caused by degeneration of motor neurons leading muscles to weaken and atrophy. Often known by this term in North America, named after a famous athlete. | |
| | Description | Disease | Letter |
| Disorder of the inner ear affecting hearing and balance, linked to surplus of lymph fluid in the lymphatic systems of one or both ears. | |
| Genetic disorder with autosomal dominant inheritance leading to congenital heart defect. Patients share similar physical traits as those with Turner's syndrome. | |
| Spasms in the sphincter at the opening of the common bile duct into the duodenum, causing pain and jaundice. | |
| Degeneration of the basal ganglia of the brain due to reduced production of dopamine, resulting in tremors and postural instability. | |
| Inflammation of the mucous sheaths of the tendons on the back of the wrist, causing soreness and difficulty gripping. | |
| Childhood developmental disorder almost exclusively affecting girls, who develop stereotypic hand-wringing movements and loss of speech. | |
| Infection with a rod-shaped, Gram-negative enterobacteria often due to food poisoning from unclean food or contaminated chicken eggs. | |
| Genetic disorder with increased prevalence among Ashkenazi Jews where harmful quantities of fatty gangliosides accumulate in the brain. | |
| Genetic disorder that is a leading cause of deafblindness, associated with a defective inner ear and degeneration of retinal cells. | |
| Common hereditary coagulation abnormality due to lack of an important protein factor needed for proper platelet adhesion. | |
| Chronic disease in which copper accumulates in tissues such as the brain, liver, and cornea, resulting in a brownish ring around the iris. | |
| Disorder where increased levels of the hormone gastrin are produced, causing the stomach to produce excess hydrochloric acid, often due to a pancreatic or duodenal tumor. | |
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