An abnormal anatomical passage connecting the RECTUM to the outside, with an orifice at the site of drainage.

Abnormal communication most commonly seen between two internal organs, or between an internal organ and the surface of the body.

An abnormal direct communication between an artery and a vein without passing through the CAPILLARIES. An A-V fistula usually leads to the formation of a dilated sac-like connection, arteriovenous aneurysm. The locations and size of the shunts determine the degree of effects on the cardiovascular functions such as BLOOD PRESSURE and HEART RATE.

An abnormal anatomical passage between the INTESTINE, and another segment of the intestine or other organs. External intestinal fistula is connected to the SKIN (enterocutaneous fistula). Internal intestinal fistula can be connected to a number of organs, such as STOMACH (gastrocolic fistula), the BILIARY TRACT (cholecystoduodenal fistula), or the URINARY BLADDER of the URINARY TRACT (colovesical fistula). Risk factors include inflammatory processes, cancer, radiation treatment, and surgical misadventures (MEDICAL ERRORS).

An abnormal passage or communication leading from an internal organ to the surface of the body.

An abnormal passage or communication between a bronchus and another part of the body.

An abnormal passage between two or more BLOOD VESSELS, between ARTERIES; VEINS; or between an artery and a vein.

Abnormal passage communicating with the STOMACH.

An abnormal passage in any part of the URINARY TRACT between itself or with other organs.

Abnormal passage communicating with the ESOPHAGUS. The most common type is TRACHEOESOPHAGEAL FISTULA between the esophagus and the TRACHEA.

Abnormal passage in any organ of the biliary tract or between biliary organs and other organs.

Abnormal passage communicating with the PANCREAS.

An abnormal anatomical passage between the RECTUM and the VAGINA.

An abnormal anatomical passage between the URINARY BLADDER and the VAGINA.

An abnormal passage communicating between any component of the respiratory tract or between any part of the respiratory system and surrounding organs.

An abnormal anatomical passage that connects the VAGINA to other organs, such as the bladder (VESICOVAGINAL FISTULA) or the rectum (RECTOVAGINAL FISTULA).

Abnormal passage between the ESOPHAGUS and the TRACHEA, acquired or congenital, often associated with ESOPHAGEAL ATRESIA.

An abnormal passage in the URINARY BLADDER or between the bladder and any surrounding organ.

Abnormal communication between two ARTERIES that may result from injury or occur as a congenital abnormality.

Surgical shunt allowing direct passage of blood from an artery to a vein. (From Dorland, 28th ed)

An acquired or spontaneous abnormality in which there is communication between CAVERNOUS SINUS, a venous structure, and the CAROTID ARTERIES. It is often associated with HEAD TRAUMA, specifically basilar skull fractures (SKULL FRACTURE, BASILAR). Clinical signs often include VISION DISORDERS and INTRACRANIAL HYPERTENSION.

An abnormal passage communicating between any components of the digestive system, or between any part of the digestive system and surrounding organ(s).

Congenital, inherited, or acquired abnormalities involving ARTERIES; VEINS; or venous sinuses in the BRAIN; SPINAL CORD; and MENINGES.

'Pleural diseases' is a broad term referring to various medical conditions that affect the pleura, the thin, double-layered membrane surrounding the lungs, including inflammation (pleurisy), effusions (excess fluid buildup), thickening, or tumors, which may cause chest pain, coughing, and breathing difficulties.

An abnormal passage within the mouth communicating between two or more anatomical structures.

An irregularly shaped venous space in the dura mater at either side of the sphenoid bone.

A method of hemostasis utilizing various agents such as Gelfoam, silastic, metal, glass, or plastic pellets, autologous clot, fat, and muscle as emboli. It has been used in the treatment of spinal cord and INTRACRANIAL ARTERIOVENOUS MALFORMATIONS, renal arteriovenous fistulas, gastrointestinal bleeding, epistaxis, hypersplenism, certain highly vascular tumors, traumatic rupture of blood vessels, and control of operative hemorrhage.

Pathological conditions in the DUODENUM region of the small intestine (INTESTINE, SMALL).

Pathological processes involving the URETHRA.

Congenital abnormality characterized by the lack of full development of the ESOPHAGUS that commonly occurs with TRACHEOESOPHAGEAL FISTULA. Symptoms include excessive SALIVATION; GAGGING; CYANOSIS; and DYSPNEA.

Large veins on either side of the root of the neck formed by the junction of the internal jugular and subclavian veins. They drain blood from the head, neck, and upper extremities, and unite to form the superior vena cava.

A fistula between the maxillary sinus and the oral cavity.

Therapy for the insufficient cleansing of the BLOOD by the kidneys based on dialysis and including hemodialysis, PERITONEAL DIALYSIS, and HEMODIAFILTRATION.

The outermost of the three MENINGES, a fibrous membrane of connective tissue that covers the brain and the spinal cord.

Pathological processes involving any part of the AORTA.