Amoebiasis is an infection of the intestines caused by the parasite Entamoeba histolytica. It is a common cause of diarrhea and can lead to serious complications if left untreated. Symptoms may include abdominal pain, diarrhea, and bloody stools. ...

Amoebiasis is an infection caused by a group of single-celled parasites called Entamoeba histolytica. These parasites are free-living amoebae, meaning they can survive and reproduce outside of a host organism. They are found in contaminated food a...

Amoebic keratitis is an infection of the cornea caused by the amoeba Acanthamoeba. It is a rare but serious eye infection that can cause vision loss if left untreated. Symptoms of amoebic keratitis include redness, pain, light sensitivity, blurred...

Amyloidosis is a rare condition in which abnormal proteins called amyloid build up in the body's organs and tissues. It can affect many different organs, including the heart, kidneys, liver, spleen, and nervous system. Symptoms vary depending on t...

Amyloidosis cutis dyschromia is a rare skin condition caused by the accumulation of amyloid proteins in the skin. It is characterized by patches of discolored skin, usually on the face, neck, and upper chest. The patches may be light or dark in co...

Amyotrophic lateral sclerosis facts Amyotrophic lateral sclerosis is a rapidly progressive, invariably fatal neurological disease that attacks the nerve cells responsible for controlling voluntary muscles. Amyotrophic late...

Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease that affects nerve cells in the brain and the spinal cord. It is also known as Lou Gehrig's disease, after the famous baseball player who was diagnosed with the conditi...

Amyotrophic lateral sclerosis type 4 (ALS4) is a rare form of amyotrophic lateral sclerosis (ALS), a progressive neurodegenerative disorder that affects the motor neurons in the brain and spinal cord. ALS4 is caused by mutations in the gene VAPB, ...

Anal cancer is a disease in which malignant (cancer) cells form in the tissues of the anus. The anus is the end of the large intestine, below the rectum, through which stool (solid waste) leaves the body. The anus is formed partly from the...

Anal cancer is a disease in which malignant (cancer) cells form in the tissues of the anus. The anus is the end of the large intestine, below the rectum, through which stool (solid waste) leaves the body. The anus is formed partly from the...

An anal fistula is a small tunnel that develops between the end of the bowel and the skin near the anus. It is usually the result of an infection in the area around the anus, such as an abscess. Anal fistulas can cause pain, discharge, and other s...

When a person suffers from allergies, certain allergens can trigger a reaction and cause swe...

Anaplastic astrocytoma is a type of brain tumor that is classified as a grade III astrocytoma. It is a malignant tumor that is composed of cells that resemble astrocytes, a type of glial cell found in the brain. It is typically found in the cerebr...

Anaplastic ependymoma is a rare type of brain tumor that develops from cells that line the ventricles of the brain. It is a malignant tumor that can spread to other parts of the brain and spinal cord. Symptoms of anaplastic ependymoma can include ...

Anaplastic ganglioglioma is a rare type of brain tumor that is composed of both glial cells (astrocytes and oligodendrocytes) and neurons. It is usually found in the cerebral hemispheres of the brain, and is most commonly seen in children and youn...

Anaplastic large cell lymphoma (ALCL) is a type of non-Hodgkin lymphoma, a cancer of the lymphatic system. ALCL is a rare type of lymphoma that usually affects the skin, lymph nodes, and other organs. It is characterized by the presence of large, ...

Anaplastic oligoastrocytoma is a type of brain tumor that is classified as a grade III astrocytoma. It is a rare type of tumor that is composed of both oligodendrocyte and astrocyte cells. It is usually found in the cerebral hemispheres of the bra...