| balloon cell nevus | A nevus in which many of the cells are large, with clear cytoplasm. (05 Mar 2000) |
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| balloon cell | An unusually large degenerated cell with pale-staining vacuolated or reticulated cytoplasm, as in viral hepatitis or in degenerated epidermal cell's in herpes zoster, a large form of nevus cell with abundant nonstaining cytoplasm, formed by vacular degeneration of melanosomes. (05 Mar 2000) |
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| basal cell nevus | A hereditary disease noted in infancy or adolescence, characterised by lesions of the eyelids, nose, cheeks, neck, and axillae, appearing as uneroded flesh-coloured papules, some becoming pedunculated, and histologically indistinguishable from basal cell epithelioma; also noted are punctate keratotic lesions of the palms and soles; the lesions usually remain benign, but in some cases ulceration and invasion occur and are evidence of malignant change; autosomal dominant inheritance. (05 Mar 2000) |
| basal cell nevus syndrome | <syndrome> An inherited group of defects which involve abnormalities of the skin, eyes, nervous system, endocrine, glands and bones. The condition is characterised by an unusual facial appearance and a predisposition for skin cancer. (27 Sep 1997) |
| spindle cell nevus | A benign, slightly pigmented or red superficial small skin tumour composed of spindle-shaped, epithelioid, and multinucleated cells that may appear atypical; most common in children, but also appearing in adults. Synonym: benign juvenile melanoma, epithelioid cell nevus, spindle cell nevus. (05 Mar 2000) |
| nevus cell | The cell of a pigmented cutaneous nevus that differs from a normal melanocyte in that it lacks dendrites. A-type, melanocytes in the epidermis in pigmented nevi, resembling epithelial cells and frequently containing melanin. Nevus cell, B-type, small, usually non-pigmented melanocytes in the mid-dermis in pigmented nevi. Nevus cell, C-type, non-pigmented spindle-shaped melanocytes in the lower dermis in pigmented nevi. Synonym: nevocyte. (05 Mar 2000) |
| nevus, epithelioid and spindle cell | A benign compound nevus occurring most often in children before puberty, composed of spindle and epithelioid cells located mainly in the dermis, sometimes in association with large atypical cells and multinucleate cells, and having a close histopathological resemblance to malignant melanoma. The tumour presents as a smooth to slightly scaly, round to oval, raised, firm papule or nodule, ranging in colour from pink-tan to purplish red, often with surface telangiectasia. (12 Dec 1998) |
| nevus, spindle cell | A form of pigmented nevus showing intense melanocytic activity around the dermo-epidermal junction. Large numbers of spindle-shaped melanocytes proliferate downward toward the dermis and usually a large amount of pigment is present. It was first described in 1976 and the bulk of patients reported have been young females with the lesions presenting on the thighs. (12 Dec 1998) |
| epithelioid cell nevus | A benign, slightly pigmented or red superficial small skin tumour composed of spindle-shaped, epithelioid, and multinucleated cells that may appear atypical; most common in children, but also appearing in adults. Synonym: benign juvenile melanoma, epithelioid cell nevus, spindle cell nevus. (05 Mar 2000) |
| angioplasty balloon | A balloon near the tip of an angiographic catheter, designed to distend narrowed vessels. See: balloon-tip catheter. (05 Mar 2000) |
| balloon | 1. A bag made of silk or other light material, and filled with hydrogen gas or heated air, so as to rise and float in the atmosphere; especially, one with a car attached for aerial navigation. 2. A ball or globe on the top of a pillar, church, etc, as at St. Paul's, in London. 3. <chemistry> A round vessel, usually with a short neck, to hold or receive whatever is distilled; a glass vessel of a spherical form. 4. <chemistry> A bomb or shell. 5. A game played with a large infated ball. 6. The outline inclosing words represented as coming from the mouth of a pictured figure. Air balloon, a balloon for aerial navigation. Balloon frame, a house frame constructed altogether of small timber. Balloon net, a variety of woven lace in which the weft threads are twisted in a peculiar manner around the warp. Origin: F. Ballon, aug. Of balle ball: cf. It. Ballone. See 1st Ball, and cf. Pallone. Source: Websters Dictionary (01 Mar 1998) |
| balloon angioplasty | <cardiology> Use of a balloon catheter for dilatation of an occluded artery. It is used in treatment of arterial occlusive diseases, including renal artery stenosis and arterial occlusions in the leg. For the specific technique of balloon dilatation in coronary arteries, angioplasty, transluminal, percutaneous coronary is available. Coronary angioplasty is accomplished using a balloon-tipped catheter inserted through an artery in the groin or arm to enlarge a narrowing in a coronary artery. Coronary artery disease occurs when cholesterol plaque builds up (atherosclerosis) in the walls of the arteries to the heart. Angioplasty is successful in opening coronary arteries in 90% of patients. 40% of patients with successful coronary angioplasty will develop recurrent narrowing at the site of balloon inflation. (05 Mar 2000) |
| balloon catheter | A catheter used in arterial embolectomy or to float into the pulmonary artery. (05 Mar 2000) |
| balloon counter pulsation | A form of circulatory assistance in which a balloon inflates in the aorta during diastole to improve diastolic pressure and deflates during systole to reduce left ventricular after load. (05 Mar 2000) |
| balloon dilatation | Nonoperative repair of occluded vessels, ducts, or valves by insertion of a balloon catheter. It is used to treat varices, torn retinas, renal and biliary calculi, gastric, bronchial and rectal stenoses, and heart valves, and includes catheterization with fogarty and foley catheters. (12 Dec 1998) |
| balloon fish | <zoology> A fish of the genus Diodon or the genus Tetraodon, having the power of distending its body by taking air or water into its dilatable oesophagus. See Globefish, and Bur fish. Source: Websters Dictionary (01 Mar 1998) |