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2012, Volume 28, Number 2, Page(s) 172-174     
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DOI: 10.5146/tjpath.2012.01119
Periosteal Chondroma of the Ischium; An Unusual Location
Bülent AKANSU1, Esin ATİK2, Süleyman ALTINTAŞ3, Aydıner KALACI4, Şerefettin CANDA2
1Department of Pathology, M.H. Diyarbakır Education and Research Hospital, Dİyarba kır, TURKEY
2Department of Pathology, Mustafa Kemal University, Faculty of Medicine, HATAY, TURKEY
3 Department of Pathology, M. H. Kahramanmaraş State Hospital, KAHRAMANMARAŞ, TURKEY
4Department of Orthopedics and Traumatology, Mustafa Kemal University, Faculty of Medicine, HATAY, TURKEY
Keywords: Chondroma, Ischium, Chondrosarcoma

Periosteal chondroma is a rare benign tumor of hyaline cartilage. Periosteal chondroma arising in the ischium is an extremely rare event. By presenting this case report, we aim to remind that differential diagnosis of these lesions should be carefully performed especially for unusual locations.

A 51-year-old man visited the orthopedics clinic with the complaints of left pelvic mass and pain lasting about one year. Computed tomography showed a solid mass with abundant specks of calcification that was 4x5 cm in diameter and associated with the ischium of the left pelvic bone. There was no evidence of penetration into the medullary cavity and cortical sclerosis. No radiological aggressive appearance was observed. The lesion was removed with the covering periosteum. Microscopically, there were lobules of hyaline cartilage composed of chondrocytes with foci of endochondral ossification and calcification. The case was reported as ‘periosteal chondroma’.

In conclusion, this case report presents a case of periosteal chondroma, a rare tumor, which occurred in an unusual location and age range. The differential diagnosis of periosteal chondroma from malignant lesions is necessary for avoiding aggressive and inappropriate treatment.


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