Extraskeletal Osteochondroma in the Nape of the Neck: A Case Report

Abstract

Marginal excision with histopathological identification is the treatment of choice.

Fibro‑osteochondroma of the uterus – A case report with brief review of literature

“…Fibro-osteochondroma shows histological similarities with extraskeletal osteochondromas which usually arises near tendons and joints but have also been reported to arise from soft tissues [3,5] However fibroosteochondromas, unlike osteochondromas show fibro-myxoid component as seen in our case. Extraskeletal osteochondroma have no reported cases in the uterus.…”

Congenital Extraskeletal Osteochondroma of the Web Space Displacing the Lesser Toes: A Unique Presentation

“…They usually arise from synovium, tendon sheath, bursa, or infrapatellar fat pad. These tumors have also been reported in the buttocks, thigh, neck, axilla, and so on (2,(4)(5)(6).…”

“…The differential diagnosis for extraskeletal osteochondromas include soft tissue chondroma, myositis ossificans, synovial chondromatosis, tumor calcinosis, ossifying fibromyxoid tumor, synovial sarcoma, extraskeletal osteosarcoma, chondrosarcoma, and pseudomalignant osseous tumor (1,5). It is important to differentiate extraskeletal osteochondroma from these other conditions.…”

“…Metaplasia of the tendon sheath of the hand and foot has been suggested as the origin of these tumors. Another proposed theory has been that these tumor cells originate from the pleuripotent cell lines derived from joint synovial tissue, tendon sheath, or connective tissue (5). Recently, the role of chromosomes has also been studied.…”

Giant intra-articular extrasynovial osteochondroma of the Hoffa's fat pad

“…1 Most of the soft tissue chondromas arise in the hands and feet, 5 however soft tissue chondromas have also been reported in the buttock 6 and nape of the neck. 7 Extraskeletal chondromas or osteochondromas may occur in patients at any age, although they are most commonly encountered between the ages of 30 and 60 years. Para-articular chondromas, also known as intracapsular chondromas, arise from the capsule and/or connective tissue adjacent to the capsule due to cartilaginous metaplasia.…”