Cutaneous T-cell lymphoma (CTCL) is a group of rare blood cancers that affects the largest organ in your body — your skin. CTCLs can look and feel like common skin conditions like psoriasis, eczema or even allergic reactions. Many people have symptoms like skin rash, itchiness or discoloration for years before obtaining a diagnosis. CTCLs are part of a larger group of cancers called non-Hodgkin lymphoma, which start in certain white blood cells called lymphocytes. Many …

Cutaneous B-cell lymphoma (CBCL) is a rare type of cancer that starts in your skin. It’s a form of “extranodal” (outside of your lymph nodes) lymphoma. Most cases look like a rash or lump(s) on your skin. They usually grow slowly and rarely spread or affect other parts of your body. CBCL is also called B-cell skin lymphoma. What are …

Cushing syndrome is an uncommon condition that happens when your body has too much of a hormone called cortisol. Another word for Cushing syndrome is hypercortisolism. A syndrome is a medical term that refers to a group of signs and symptoms that happen together. You may see some people call this condition Cushing’s syndrome. Cortisol is a steroid hormone commonly called …

Scoliosis is an abnormal side-to-side curvature of your spine. Your spine (backbone) naturally has a slight forward and backward curve. With scoliosis, your spine curves to the left and right into a C or S shape. Most cases of scoliosis are mild, don’t cause symptoms and don’t need treatment. Severe cases can cause uneven posture and pain. Treatment may include wearing …

Peyronie’s (pay-roe-NEEZ) disease is a condition in which scar tissue (plaque) in your penis causes it to bend, curve or lose length or girth (circumference). You may be able to feel the scar tissue through your skin, or you may have pain in a specific part of your penis as the scar tissue forms. When you have an erection, your penis may bend …

During fetal development, the testicles develop in the abdomen. Testicles make and store sperm sex cells. Before birth, the testicles typically drop from inside the abdomen into the scrotum. The scrotum is the thin pouch of skin behind the penis that normally holds the testicles. Undescended testicles are when the testicles fail to drop into the scrotum before birth or in the first …

Cryoglobulinemia is a condition that occurs when abnormal proteins in your blood called cryoglobulins thicken and clump together at cold temperatures. The condition is a type of vasculitis (inflammation of your blood vessels), which can restrict blood flow and cause damage to your skin, nerves, joints, muscles and organs — particularly your kidneys. Another name for cryoglobulinemia is cryoglobulinemic vasculitis. Cryoglobulinemia types Cryoglobulins …

Croup (laryngotracheobronchitis) is a respiratory infection that affects young children. Viral infections are the most common cause of the condition. Croup causes swelling of your child’s voice box (larynx) and windpipe (trachea). This swelling causes the airway below their vocal cords to narrow, which makes their breathing noisy and difficult. Croup in babies is most common, along with children younger than 3 years old. …

Sudden infant death syndrome (SIDS) is the term used to describe the sudden and unexplained death of an infant who’s between 1 month and 1 year of age, even after thorough investigation. This investigation includes performing an autopsy, examining the death scene and reviewing the baby’s medical history. If the medical examiner or coroner can’t find a cause for the …