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Description Obstetric fistula, abnormal duct or passageway that forms between the vagina and a nearby organ. This type of fistula most often forms either between the bladder and the vagina (vesicovaginal fistula) or between the rectum and the vagina (rectovaginal fistula). Obstetric fistulas frequently occur as a result of complications …

What is olecranon bursitis? Olecranon bursitis causes significant swelling (like a ‘golf ball’) and pain at the back of the elbow. The pain is aggravated by bending the elbow and is particularly painful if you lean on the point of the elbow. The hallmark sign is swelling and this can …

Overview of Otosclerosis Otosclerosis describes a condition of abnormal bone growth around one of the three small bones in the middle ear space called the stapes. When bone around the stapes hardens, the bone cannot move freely, which limits the ability to properly transmit sound. This results in hearing loss; …

What is Onycholysis? Onycholysis refers to the physical sign of separation of the nail plate from the nail bed. Because of this separation, the portion of the nail plate that is not attached appears white. A greenish discoloration can sometimes be seen in onycholysis, and can represent concomitant Pseudomonas infection. …

Overview Onychauxis is a nail condition that presents thickened nails without structural deformity. It is also known as nail hypertrophy or hypertrophic nails. Onychauxis is more prevalent in the elderly people and can occur in either, toenails or fingernails. Many times, in fact, onychauxis is a natural part of aging. …

Definition Osgood-Schlatter Disease is a condition that happens when a tendon in the knee (the patellar tendon) pulls against the top of the shinbone. This causes pain in the knee and the upper shin. Tendons are bands of tissue that connect muscles to bones. The patellar tendon pulls on an …

What is osteochondritis dissecans? Osteochondritis dissecans is a condition that occurs in the joints (the place where the end of one bone meets the end of another bone) when a lack of blood to the joint causes the bone inside to soften. This results in a small piece of the …

Orthopnea definition Orthopnea is the shortness of breath that happens while a person lying flat. The shortness of breath is followed by a tightness feeling in the chest and the feeling is as if he or she is not able to get enough oxygen for proper breathing. This occurs usually …