Giant Periosteal Chondroma: Report of a Rare Case ED15-ED17
9E, Cheloor Platinum Heights, Pipeline Road, Mylipadam, P.O. Chembukkavu, Thrissur-680020, Kerala, India.
Periosteal chondromas are uncommon benign cartilaginous neoplasms which account for <2% of all bone tumours. They are rarely >5 cm in greatest diameter with an average size of 3 cm, with proximal humerus being a characteristic location. Large periosteal chondromas are very rare. Clinically, they present as palpable often painful masses. Radiographically, they appear as radiolucent bone surface tumours that form sharply marginated erosions (â€śsaucerisationâ€ť) of the cortex and are well demarcated from the underlying medullary cavity by a thin rim of sclerosis. Histologically, these tumours are well circumscribed, and are characterised by lobules of cartilage with benign clusters of chondrocytes that do not have a permeative growth pattern. Occasionally, these tumours can be more cellular showing nuclear pleomorphism and binucleation, which can be misdiagnosed as chondrosarcoma. Periosteal chondromas are treated with en-bloc excisions. This case report describes a case of giant periosteal chondroma of proximal humerus.