Activated PI3K-delta syndrome (APDS) is a rare genetic disorder caused by mutations in the PIK3CD gene. It is characterized by recurrent infections, enlarged lymph nodes, and an increased risk of developing certain types of cancer. Other symptoms ...

Acute ackee fruit intoxication is a type of food poisoning caused by eating unripe ackee fruit. The unripe fruit contains a toxin called hypoglycin A, which can cause severe vomiting, hypoglycemia, and even death if left untreated. Symptoms usuall...

Acute annular outer retinopathy (AOOR) is a rare eye disorder that affects the peripheral retina. It is characterized by the sudden onset of a ring-shaped lesion in the outer retina, which can cause vision loss. The cause of AOOR is unknown, but i...

Acute basophilic leukemia (ABL) is a rare type of acute myeloid leukemia (AML) that is characterized by an abnormal increase in the number of basophils, a type of white blood cell. It is a very aggressive form of leukemia and is often difficult to...

Acute bilirubin encephalopathy is a neurological disorder caused by high levels of bilirubin in the blood. It is most commonly seen in newborns, and is caused by an inability of the liver to process bilirubin. Symptoms of acute bilirubin encephalo...

Acute cholecystitis is an inflammation of the gallbladder, usually caused by a gallstone blocking the cystic duct. Symptoms may include abdominal pain, nausea, vomiting, and fever. Treatment typically involves antibiotics and surgery to remove the...

Acute Disseminated Encephalomyelitis (ADEM) is an inflammatory disorder of the central nervous system (CNS) that is characterized by a sudden onset of neurological symptoms. It is thought to be an autoimmune disorder, in which the body's own immun...

Acute disseminated encephalomyelitis with anti-MOG antibodies (ADEM-MOG) is a rare autoimmune disorder of the central nervous system (CNS) characterized by inflammation of the brain and spinal cord. It is caused by the body's immune system attacki...

Acute disseminated encephalomyelitis (ADEM) without anti-MOG antibodies is an inflammatory demyelinating disorder of the central nervous system (CNS) that is characterized by a sudden onset of neurological symptoms, including fever, headache, conf...

Acute encephalopathy with biphasic seizures and late reduced diffusion (AESD) is a rare neurological disorder characterized by recurrent seizures, encephalopathy (brain dysfunction), and reduced diffusion of water molecules in the brain on MRI sca...

Acute endophthalmitis is an infection of the eye that can cause severe vision loss. It is usually caused by bacteria or fungi that enter the eye through a wound or surgical procedure. Symptoms of acute endophthalmitis include redness, pain, blurre...

Acute eosinophilic pneumonia is a rare type of pneumonia caused by an increase in the number of eosinophils, a type of white blood cell, in the lungs. Symptoms of acute eosinophilic pneumonia include fever, cough, shortness of breath, chest pain, ...

Acute erythroid leukemia (AEL) is a rare type of acute myeloid leukemia (AML) that affects the red blood cells. It is characterized by the rapid production of immature red blood cells (erythroblasts) in the bone marrow. Symptoms of AEL include fat...

Acute fatty liver of pregnancy (AFLP) is a rare but serious complication of pregnancy that can occur in the third trimester. It is caused by an accumulation of fat in the liver, which can lead to liver failure and other serious complications. Symp...

Acute Febrile Neutrophilic Dermatosis (Sweet Syndrome) is a rare skin disorder characterized by the sudden onset of fever, skin lesions, and an increase in the number of neutrophils (a type of white blood cell) in the bloodstream. It is usually as...

Acute flaccid myelitis (AFM) is a rare neurological condition that affects the spinal cord and can cause paralysis. It is most commonly seen in children and is believed to be caused by a virus, although the exact cause is unknown. Symptoms include...