Myasthenia gravis (MG) is a chronic autoimmune disorder that causes weakness in the skeletal muscles, which worsens after periods of activity and improves after rest. It can affect individuals of any age and often presents with symptoms such as drooping eyelids, double vision, and difficulty swallowing.

Multifocal motor neuropathy (MMN) is a rare disorder characterized by progressive muscle weakness without sensory loss. It primarily affects adults and typically presents with asymmetric weakness in the hands and forearms, often starting on one side.

Kawasaki disease (KD) is an illness primarily affecting young children that causes inflammation in the blood vessels. It often presents with symptoms such as high fever, rash, swollen glands, red eyes, and redness in the hands and feet.

Infectious and autoimmune encephalitis (IAE) is an inflammation of the brain caused by viral or bacterial infections, or via the immune system mistakenly attacking brain tissue, affecting people of all ages. It typically presents with symptoms such as fever, headache, confusion, seizures, and changes in personality or behavior.

Idiopathic thrombocytopenic purpura (ITP) is an autoimmune disorder characterized by a low platelet count, which can lead to excessive bruising and bleeding. It affects both children and adults, often presenting with symptoms such as easy bruising, nosebleeds, and petechiae (small red or purple spots on the skin).

Dermatomyositis is an inflammatory disease marked by muscle weakness and a distinctive skin rash. It can affect both adults and children, often presenting with muscle pain, fatigue, and a purple-red skin rash on areas such as the face, neck, and hands.

Common variable immunodeficiency (CVID) is a disorder characterized by low levels of antibodies, leading to an increased susceptibility to infections. It affects both children and adults and commonly presents with frequent respiratory infections, sinusitis, and pneumonia.

Chronic inflammatory demyelinating polyneuropathy (CIDP) is a neurological disorder characterized by progressive weakness and impaired sensory function in the legs and arms due to nerve damage. It can affect individuals of any age but is more common in adults, often presenting with symptoms such as tingling, numbness, and muscle weakness.

Ulcerative colitis is a chronic inflammatory bowel disease that primarily affects the colon and rectum, resulting in ulcers and inflammation of the colon’s lining. It generally affects people of various ages, and can cause abdominal pain, diarrhea, and rectal bleeding.

Short bowel syndrome is a condition where a significant portion of the small intestine is missing or non-functional, leading to poor nutrient absorption. It primarily affects individuals who have undergone extensive surgical removal of the intestine and can present with symptoms such as diarrhea, malnutrition, and weight loss.