Frequent infections could mean that you have an immune system disorder. The conditions in this category are usually caused by genetic changes.
Disease
Primary lateral sclerosis (PLS)
This motor neuron disease causes nerves within the brain to slowly break down. It causes muscle weakness primarily in the legs, arms and tongue.
Disease
Primary mediastinal large B-cell lymphoma
Learn about the symptoms, diagnosis and treatment of this type of non-Hodgkin lymphoma.
Disease
Primary ovarian insufficiency
This condition, also called premature ovarian failure, happens in women under age 40. Hormone therapy can lessen symptoms.
Disease
Primary progressive aphasia
Find out more about this type of dementia that affects the speech and language areas of the brain.
Disease
Primary progressive apraxia of speech (PPAOS)
This speech disorder happens when the brain does not communicate properly with the muscles used for speech.
Disease
Primary sclerosing cholangitis (PSC)
Scarring in the bile ducts blocks the flow of bile from the liver and damages liver tissue. A liver transplant is the only known cure.
Disease
Proctitis
Inflammation of the rectal lining can cause pain, bleeding and diarrhea. This condition can be a treatment side effect or part of a more generalized disease.
Disease
Progeria
This genetic disorder is extremely rare and progressive. It causes children to age rapidly, beginning in their first two years of life.
Disease
Progressive supranuclear palsy
Learn about this brain condition that affects your ability to walk, move your eyes, talk and eat.
Disease
Prolactinoma
Learn how this pituitary gland tumor changes some hormone levels and can lead to health concerns such as infertility, low libido and vision problems.
Disease
Prostate cancer
Learn about detection, diagnostic approaches, treatment options and advances for prostate cancer, including robotic prostatectomy and current research.