This common knee injury affects the tendon that stretches from the kneecap to the shinbone.
Disease
Pediatric brain tumors
Pediatric brain tumors include medulloblastoma, glioma, embryonal tumor, germ cell brain tumor, spinal cord tumor, craniopharyngioma and pineoblastoma.
Disease
Peripheral nerve tumors
Learn about these growths that form in or near nerves connecting to the spinal cord. Surgery is the most common treatment.
Disease
Pituitary tumors
Learn more about the symptoms, causes and treatment of growths that develop in the pituitary gland.
Disease
Post-traumatic stress disorder (PTSD)
This mental health condition, which is caused by being part of or witnessing a terrifying event, leads to symptoms that include flashbacks, nightmares and severe anxiety.
Disease
Retractile testicle
Find out about this condition that allows the testicle to move between the scrotum and groin.
Disease
Salivary gland tumors
Learn about this rare tumor that forms in the salivary glands. Treatments include surgery and radiation therapy.
Disease
Sexually transmitted diseases (STDs)
Find out the symptoms of STDs and what you can do to prevent them, along with the treatments if you're diagnosed with one.
Disease
Skull base tumors
Skull base tumors are abnormal growths at the base of the skull that can be benign or cancerous and cause symptoms such as headaches, dizziness and nosebleeds. Treatment may include surgery, radiation or careful monitoring.
Disease
Sleep terrors (night terrors)
These are times of screaming or crying, intense fear, and sometimes waving arms and legs during sleep. The person often sits up in bed, looking scared.
Disease
Soft tissue sarcoma
This rare type of cancer can begin in the muscles, fat, blood vessels, nerves, tendons and the lining of joints. Treatment usually includes surgery.
Disease
Solitary fibrous tumor
This rare type of tumor most often occurs near the lungs. Surgery is usually the treatment.