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orchitis

Inflammation of a testis.

orf

A skin infection occasionally transmitted to humans by sheep.

orthotics

The fitting of an appliance designed to support joints or correct deformity, known as an orthosis.

Osgood-Schlatter's disease

A condition that affects adolescents. It is a disorder characterised by inflammation of the bone, cartilage and/or tendon at the top of the shinbone, where the tendon from the kneecap attaches.

Osler–Weber–Rendu syndrome

An inherited disorder also known as hereditary haemorrhagic telangiectasia.

osteitis

Inflammation of bone, most commonly caused by infection.

osteoarthritis

A disease mainly of the large joints of the body, as a result of wear and tear of the surface cartilage.

osteochondritis

Inflammation of cartilage or bone in a joint.

osteomalacia

A condition in which the bones become weak and soft.

osteomyelitis

An infection of a bone.

osteopathy

A therapeutic system that centres around the concept that many conditions are related to musculoskeletal disorders.

osteoporosis

A condition resulting in brittle bones due to loss of bony tissue.

osteosarcoma

The most common form of bone cancer.

ostomy

A surgical procedure to create an opening in the body for the elimination of bodily waste.

OTC

over the counter

otitis externa

An ear infection affecting the outer ear.

otitis media

Inflammation of the middle ear, the chamber of the ear that lies behind the eardrum.

otosclerosis

A disorder of the middle ear that causes progressive deafness.

ovarian

relating to the ovaries

ovaries

Female reproductive organs situated one on either side of the uterus (womb). They produce egg cells (ova) and hormones in a monthly cycle.

overflow incontinence

Incontinence of urine due to uncontrollable leakage when the bladder fails to empty properly and becomes over-filled.

ovulation

When one or more eggs are released from the ovary.

ovulatory

Associated with ovulation.

pacemaker

A small electrical device that functions to maintain a normal heart rate.