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perfusion CT

A type of CT (computed tomography) scan, during which contrast medium is injected to enhance the visibility of structures.

perianal

Around the anus.

perianal disease

A disease around the anus, including tears, warts and abscesses.

periarticular

Surrounding a joint.

pericardial effusion

An abnormal collection of fluid around the heart.

pericarditis

Inflammation of the sac surrounding the heart (the pericardium).

pericardium

The sac surrounding the heart.

perimenopause

The period leading up to and around the time of the menopause

perineum

The part of the body between the anus (the lowest part of the gastrointestinal tract) and the opening of the urethra (the tube connecting the bladder to the outside of the body).

periodontal disease

Gum disease.

perioral dermatitis

Spots and pustules occurring mainly around the mouth, most often in young women. The cause is unknown.

perioral dermatitis

A common skin rash that affects the skin around the mouth.

peripheral arterial disease

A disease affecting the arteries, which become narrowed, restricting blood flow to the muscles in the limbs.

peripheral blood stem cell transplant

A procedure to restore stem cells within bone marrow destroyed by chemotherapy.

peritoneal fluid

The liquid that is made in the abdominal cavity to lubricate the surface of the tissue that lines the abdominal wall and pelvic cavity

peritoneum
The membrane that forms the lining of the abdominal cavity.
peritonitis

Inflammation of the structure that lines the abdominal cavity.

personality disorder

An umbrella term for a variety of problem personalities in which those affected have difficulty relating to other people and to themselves.

petechiae

Tiny red, brown or purple spots under the skin or mucous membranes, due to minor haemorrhage (bleeding) in small blood vessels called capillaries.

Peutz-Jegher syndrome

An inherited genetic disease leading to growths or polyps in the gastrointestinal tract and spots around the mouth and anus. Those affected have an increased risk of various cancers.

Peutz-Jegher's syndrome

A very rare inherited condition in which polyps occur in the gastrointestinal tract and small, brown spots appear on the lips and in the mouth.

Peyronie's disease

A disorder of the penis in which part of the sheath of fibrous connective tissue thickens, causing the penis to bend during erection.

PF

proctalgia fugax

phaeochromocytoma

A rare type of tumour.