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 [kal´ku-lus] (pl. cal´culi) (L.)
an abnormal concretion, usually composed of mineral salts, occurring within the body, chiefly in hollow organs or their passages. Called also stone. See also kidney stone and gallstone. adj., adj cal´culous.
biliary calculus gallstone.
bladder calculus vesical calculus.
bronchial calculus broncholith.
calcium oxalate calculus oxalate calculus.
dental calculus a hard, stonelike concretion, varying in color from creamy yellow to black, that forms on the teeth or dental prostheses through calcification of dental plaque; it begins as a yellowish film formed of calcium phosphate and carbonate, food particles, and other organic matter that is deposited on the teeth by the saliva. It should be removed regularly by a dentist or dental hygienist; if neglected, it can cause bacteria to lodge between the gums and the teeth, causing gum infection, dental caries, loosening of the teeth, and other disorders. Called also tartar.
gastric calculus gastrolith.
intestinal calculus enterolith.
lung calculus a hard mass or concretion formed in the bronchi around a small center of inorganic material, or from calcified portions of lung tissue or adjacent lymph nodes. Called also pneumolith.
mammary calculus a concretion in one of the lactiferous ducts.
nasal calculus rhinolith.
oxalate calculus a hard urinary calculus of calcium oxalate; some are covered with minute sharp spines that may abrade the renal pelvic epithelium, and others are smooth. Called also calcium oxalate calculus.
phosphate calculus a urinary calculus composed of a phosphate along with calcium oxalate and ammonium urate; it may be hard, soft, or friable, and so large that it may fill the renal pelvis and calices.
prostatic calculus a concretion formed in the prostate, chiefly of calcium carbonate and phosphate. Called also prostatolith.
renal calculus kidney stone.
staghorn calculus a urinary calculus, usually a phosphate calculus, found in the renal pelvis and shaped like the antlers of a stag because it extends into multiple calices.
urate calculus uric acid calculus.
urethral calculus a urinary calculus in the urethra; symptoms vary according to the patient's sex and the site of lodgment.
uric acid calculus a hard, yellow or reddish-yellow urinary calculus formed from uric acid.
urinary calculus a calculus in any part of the urinary tract; it is vesical when lodged in the bladder and renal (see kidney stone) when in the renal pelvis. Common types named for their primary components are oxalate calculi, phosphate calculi, and uric acid calculi. Called also urolith.
uterine calculus any kind of concretion in the uterus, such as a calcified myoma. Called also hysterolith and uterolith.
vesical calculus a urinary calculus in the urinary bladder. Called also bladder calculus.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


A calcareous concretion in the nasal cavity often around a foreign body.
[rhino- + G. lithos, stone]
Farlex Partner Medical Dictionary © Farlex 2012


A calcareous concretion in the nasal cavity, often around a foreign body.
[rhino- + G. lithos, stone]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Upon being examined by flexible laryngoscopy, he was found to have a large right nasal cavity rhinolith with greenish postnasal discharge and a left-sided septal deviation.
A CT scan revealed (in his right nasal cavity) a calcified object with central translucency suggestive of a rhinolith (Figure l).
Rhinoliths develop within the nasal cavity as a result of mineralization of an endogenous or exogenous nidus.
X-ray PNS revealed the rhinolith to be an ectopic tooth arising from incisive foramen.
Rhinolith was diagnosed equally with DNE and CT scan, but CT scan could also tell the size and posterior extent of rhinolith.
Rhinoliths are rare calcareous concretions that form as the result of a deposition of salts on an intranasal foreign body.
A rhinolith is a calcareous concretion that forms as a result of the deposition of salts on an intranasal nidus.
The rhinolith was extracted in several pieces under local anesthesia (figure 2).
Final pathology confirmed that the mass was a rhinolith, which arose secondary to impaction of a sunflower seed.
In view of the concretion's size, irregular surface, and impingement on the adjacent inferior turbinate, she was scheduled to undergo removal of the rhinolith under general anesthesia.
Rhinoliths can remain undetected for years and only upon growth do they produce symptoms that lead to their discovery.
The differential diagnosis for an ectopic tooth includes foreign bodies in the nose, rhinoliths, granulomatous infections, and tumors.