nonossifying fibroma

fibroma /fi·bro·ma/ (fi-bro´mah) pl. fibromas, fibro´mata   a tumor composed mainly of fibrous or fully developed connective tissue.

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ameloblastic fibroma  an odontogenic tumor marked by simultaneous proliferation of both epithelial and mesenchymal tissue, without formation of enamel or dentin.

cementifying fibroma  a tumor of fibroblastic tissue containing masses of cementum-like tissue, usually in the mandible of older persons.

chondromyxoid fibroma  a rare, benign, slowly growing tumor of bone of chondroblastic origin, usually affecting the large long bones of the lower limb.

cystic fibroma  one that has undergone cystic degeneration.

fibroma mollus´cum  small subcutaneous nodules scattered over the body surface; seen in some forms of neurofibromatosis.

nonossifying fibroma , nonosteogenic fibroma a degenerative and proliferative lesion of the medullary and cortical tissues of bone.

ossifying fibroma , ossifying fibroma of bone a benign, slow-growing, central bone tumor, usually of the jaws, especially the mandible, composed of fibrous connective tissue within which bone is formed.

perifollicular fibroma  one or more small, flesh-colored, papular, follicular lesions on the head and neck.

peripheral ossifying fibroma  epulis; a fibroma, usually of the gingiva, showing areas of calcification or ossification.

periungual fibroma  one of multiple smooth, firm, protruding nodules occurring at the nail folds and pathognomonic of tuberous sclerosis.

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nonossifying fibroma

[-os′ifī′ing]

a sharply circumscribed, eccentrically located lesion in the metaphyses of long bones in children. Microscopic examination reveals whorl patterns of spindle cells, fibrous tissue, numerous xanthoma cells, and occasional giant cells.

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fibroma

a tumor composed mainly of fibrous or fully developed connective tissue. Their common association with particular sites, e.g. nasal, genital, laryngeal, falx cerebri, results in some well-identified clinical syndromes. See also interdigital fibroma, myxomatosis.

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ameloblastic fibroma

an odontogenic fibroma, marked by simultaneous proliferation of both epithelial and mesenchymal tissue, without formation of enamel or dentine. A rare tumor recorded in calves and young cats. It behaves like an ameloblastoma. Called also fibroameloblastoma.

cementifying fibroma

cementoblastoma; a tumor usually occurring in the mandible consisting of fibroblastic tissue containing masses of cementum-like tissue.

chondromyxoid fibroma of bone

a benign slowly growing tumor of chondroblastic origin, usually affecting the long bones.

cystic fibroma

one that has undergone cystic degeneration.

fibroma myxomatodes

myxofibroma; a fibroma containing myxomatous tissue.

nonossifying fibroma

a rare benign tumor of bone derived from fibrous tissue in the bone cortex.

nonosteogenic fibroma

a degenerative and proliferative lesion of the medullary and cortical tissues of bone.

odontogenic fibroma

a benign tumor of the jaw arising from the embryonic portion of the tooth germ, the dental papilla, or dental follicle, or later from the periodontal membrane.

ossifying fibroma, ossifying fibroma of bone

a benign, relatively slow-growing, central bone tumor, usually of the jaws, especially the mandible, which is composed of fibrous connective tissue within which bone is formed.

Shope rabbit fibroma

a transmissible disease of rabbits caused by a poxvirus found only in the tumors. The virus is closely related to that of myxomatosis. Clinically there are one or more subcutaneous tumors which grow rapidly and then regress in the domestic rabbit but grow very slowly in the cottontail rabbit. Fibroma virus has been used as a vaccine against myxomatosis. See also berry-dedrick phenomenon.

soft fibroma

see fibrovascular papilloma.

squirrel fibroma

see squirrel fibroma.