retention point |
A provision made within a cavity preparation of a tooth to hold in place the first pieces of gold when placing a direct gold restoration.
(05 Mar 2000) |
retention polyp |
A smoothly rounded mucosal hamartoma of the large bowel, which may be multiple and cause rectal bleeding, especially in the first decade of life; it is not precancerous.
Synonym: retention polyp.
(05 Mar 2000) |
retention suture |
<surgery> A heavy reinforcing suture placed deep within the muscles and fasciae of the abdominal wall to relieve tension on the primary suture line and thus obviate postoperative wound disruption.
Synonym: tension suture.
(05 Mar 2000) |
retention vomiting |
<gastroenterology, physiology> Vomiting due to mechanical obstruction, usually hours after ingestion of a meal.
(05 Mar 2000) |
chylomicron retention disease |
An inherited disorder in which apolipoprotein B-48 is retained in intestine and absent in plasma; results in fat malabsorption.
(05 Mar 2000) |
dental prosthesis retention |
The retention of a dental prosthesis in place by design, device, or adhesion.
(12 Dec 1998) |
denture retention |
The retention of a denture in place by design, device, or adhesion.
(12 Dec 1998) |
direct retention |
Retention obtained in a removable partial denture by the use of attachments or clasps which resist their removal from the abutment teeth.
(05 Mar 2000) |
indirect retention |
Retention obtained in a removable partial denture through the use of indirect retainers.
(05 Mar 2000) |
oil retention enema |
A rectal injection of mineral oil, introduced at low pressure and retained for several hours before expelling, to soften faeces.
(05 Mar 2000) |
urinary retention |
The inability to pass urine from the bladder, most often due to an obstruction of flow. In older males, this may be due to prostate enlargement. Urine retention can also occur as a drug side effect (anticholinergics), after surgical procedures and in the presence of a urethral stricture (narrowing of the urethra).
(27 Sep 1997) |
fluid retention |
An abnormal accumulation of fluid in cells, tissues or body cavities that results in swelling.
(16 Dec 1997) |
adrenal cyst |
<radiology> Same characteristics as renal cysts, but less common, thick wall, septations, calcifications suggests pseudocyst
(12 Dec 1998) |
adventitious cyst |
1. An accumulation of fluid in a cystlike loculus, but without an epithelial or other membranous lining.
Synonym: adventitious cyst, false cyst.
2. A cyst whose wall is formed by a host cell and not by a parasite.
3. A mass of 50 or more Toxoplasma bradyzoites, found within a host cell, frequently in the brain; formerly called a pseudocyst, but now considered a true cyst enclosed in its own membrane within the host cell that may rupture to release particles that form new cysts, and apparently is infective to another vertebrate host.
See: bradyzoite.
Origin: pseudo-+ G. Kystis, bladder
(05 Mar 2000) |
allantoic cyst |
Cyst occurring in a persistent portion of the urachus, presenting as an extraperitoneal mass in the umbilical region. It is characterised by abdominal pain, and fever if infected. It may rupture, leading to peritonitis, or it may drain through the umbilicus.
(12 Dec 1998) |