This group of conditions is caused by pressure on the blood vessels or nerves between the collarbone and rib. The pressure can cause pain and numbness.
Disease
Tonic-clonic (grand mal) seizure
Learn about this type of seizure that can cause convulsions. Also know how to help if you see someone having one.
Disease
Tourette syndrome
The repetitive movements and sounds called tics that characterize Tourette syndrome can affect daily life — but there are ways to manage them.
Disease
Toxic shock syndrome
This rare complication of some types of bacterial infections can be fatal. Learn about symptoms, risk factors and treatment.
Disease
Triple X syndrome
Females with this genetic disorder have three X chromosomes instead of two. Symptoms can be mild or include developmental delays and learning disabilities.
Disease
Tuberous sclerosis
This uncommon genetic disorder causes tumors that are not cancer. These tumors are unexpected overgrowths of tissue in different parts of the body.
Disease
Turner syndrome
Turner syndrome affects only females as the result of a missing or partially missing X chromosome, causing a variety of medical and developmental problems.
Disease
Undifferentiated pleomorphic sarcoma
Learn about this cancer that most often happens in the soft tissues of the arms and legs. Treatments include surgery, radiation therapy and chemotherapy.
Disease
Urethral stricture
Narrowing of the tube that carries urine from the body, called the urethra, can limit urine flow and cause a number of problems.
Disease
VEXAS syndrome
Learn about this condition that causes swelling and irritation throughout the body, how to know if you have it and what you can do about it.
Disease
Vasovagal syncope
Learn about what causes a brief loss of consciousness and when to see a healthcare professional if this happens to you.
Disease
Ventricular septal defect (VSD)
In this heart problem present at birth, there is a hole between the two lower heart chambers. Know the symptoms and when surgery is needed.