osteochondroma


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Related to osteochondroma: osteosarcoma, chondrosarcoma

osteochondroma

 [os″te-o-kon-dro´mah]
a benign bone tumor consisting of projecting adult bone capped by cartilage.

os·te·o·chon·dro·ma

(os'tē-ō-kon-drō'mă),
A benign cartilaginous neoplasm that consists of a pedicle of normal bone (protruding from the cortex) covered with a rim of proliferating cartilage cells; may originate from any bone that is preformed in cartilage, but is most frequent near the ends of long bones, usually in patients 10-25 years of age; the lesion is frequently not noticed, unless it is traumatized or of large size; multiple osteochondromas are inherited and referred to as hereditary multiple exostoses.
[osteo- + G. chondros, cartilage, + -oma, tumor]

osteochondroma

/os·teo·chon·dro·ma/ (-kon-dro´mah) a benign bone tumor consisting of projecting adult bone capped by cartilage projecting from the lateral contours of endochondral bones.

osteochondroma

[os′tē·ōkondrō′mə]
Etymology: Gk, osteon + chondros, cartilage, oma, tumor
a benign tumor composed of bone and cartilage. The onset is usually in childhood. It affects more males than females.
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Osteochondroma

os·te·o·chon·dro·ma

(os'tē-ō-kon-drō'mă)
A benign cartilaginous neoplasm that consists of a pedicle of normal bone covered with a rim of proliferating cartilage cells; multiple osteochondromas are inherited and referred to as hereditary multiple exostoses.
[osteo- + G. chondros, cartilage, + -oma, tumor]

osteochondroma

A bony protrusion capped with cartilage, occurring most commonly at the ends of long bones. These are thought to be disorders of bone growth rather than tumours, but occasionally malignant change supervenes.

osteocartilaginous exostosis

; osteochondroma; subungual exostosis benign, neoplastic pedicle of cartilage-capped bone, arising at the dorsal aspect or tip of a terminal phalanx in response to trauma; causes local pain and distortion of overlying nail plate; treated by surgical excision, after removal of the overlying nail plate; patients should be warned of 30% risk of onychocryptosis subsequent to nail plate regrowth

osteochondroma

a benign bone tumor consisting of projecting adult bone capped by cartilage which is proliferating and undergoing endochondral ossification; cartilaginous exostosis.
References in periodicals archive ?
A giant extrasynovial osteochondroma in the infrapatellar fat pad: end stage Hoffa's disease.
An osteochondroma can occur in or on any bone where endochondral ossification occurs.
Integrated PET/CT in evaluating sarcomatous transformation in osteochondromas.
The etiology of osteochondroma is still being debated.
The differential diagnosis for CH type 1 includes 1) maxillary hypeplasia; 2) mandibular prognathism without CH (patients start out as skeletal Class III in early childhood and maintain harmonious growth between maxilla and mandible, with cessation of growth at the normal ages); 3) dislocation of condyles anterior to the articular eminence; 4) dental interferences or habitual posturing causing anterior positioning of the mandible; 5) acromegaly; 6) macroglossia; 7) congenital or acquired facial asymmetry unrelated to the TMJ; and 8) other TMJ pathology such as osteochondroma, osteoma, or contralateral condylar resorption.
In rare cases, the injury occurs after the development of an osteochondroma in the proximal ulna, which leads to dislocation of the radial head as a result of local compression, such as in the case described here.
Osteochondromas are typically solitary, appendicular lesions, which cease growing after the skeleton matures (Figure 11).
There have only been 16 cases of the hereditary bone growth disorder, now known as multiple osteochondromas, identified in ancient remains worldwide.
Chondrosarcomas may arise de novo (primary), or superimposed (secondary) upon preexisting cartilaginous lesions, such as enchondromas or osteochondromas.
Brachyury staining was further performed in the following 2 categories: (1) 58 nonchordomatous tumors, which included 26 chondroid tumors (4 cases of grade I chondrosarcoma, 9 cases of grade II chondrosarcoma, 3 cases of grade III chondrosarcoma, 2 cases of chondromyxoid fibroma, 1 chondroblastoma, 4 osteochondromas, and 2 cases of extraskeletal myxoid chondrosarcoma), 7 liposarcomas, 5 rhabdomyosarcomas, 4 pleomorphic adenomas, 4 mucoepidermoid carcinomas, 4 mucinous adenocarcinomas, 6 germ cell tumors, and 2 cases of renal cell carcinoma (Table 2); and (2) 7 unrelated miscellaneous tissues, which included normal cartilage derived from trachea (2 cases), articular surface (1 case), and testicular tissue (4 cases).
Cartilaginous tumors (such as osteochondromas, enchondromas, and chondrosarcomas) may produce irregularly shaped calcifications within their matrix that resemble popcorn on imaging studies (Figure 16).