Scapular osteochondrolipoma: Imaging features with pathological correlation

Abstract

Osteochondrolipoma is an extremely rare histological variant of lipoma with osseous and cartilaginous differentiation. The present study reports an unusual case of an osteochondrolipoma occurring in the left scapular region of a 49-year-old male. The physical examination revealed a 3-cm, hard, non-tender and minimally mobile mass. Plain radiography revealed a faintly ossified soft-tissue mass without evidence of bone erosion. Computed tomography (CT) confirmed the presence of a lesion and the normal appearance of the scapula. Magnetic resonance imaging (MRI) showed a well-circumscribed subcutaneous mass with an almost homogeneous high signal intensity on the T1- and T2-weighted sequences. Contrast-enhanced fat-suppressed T1-weighted sequences demonstrated a faint peripheral and septal enhancement of the mass. A marginal excision of the tumor was performed. Histologically, the tumor was predominantly composed of mature adipocytes mixed with thin trabeculae of mature bone. In addition, small amounts of mature hyaline cartilage and osteoid were identified in the periphery of the lesion. Based on these findings, the tumor was diagnosed as an osteochondrolipoma. The patient demonstrated no evidence of local recurrence within six months of follow-up. Although rare, osteochondrolipoma should be considered as a differential diagnosis of a well-defined, calcified/ossified, subcutaneous mass in the scapular region.

Positron emission tomography/computed tomography for osseous and soft tissue sarcomas: A systematic review of the literature and meta-analysis

“…Currently, radiographic tests such as X-ray, CT and MRI are widely applied for the diagnosis and treatment of musculoskeletal system malignancies (22). 18 F-fluorodeoxyglucose (FDG) PET is used for the semiquantification of glucose consumption by cells in the body, which makes it possible to measure the enhancement of metabolic activity in cancer tissue.…”

Intracranial interhemispheric osteochondrolipoma: Diagnostic and surgical challenges in an extremely rare entity

“…Osteochondrolipoma is an extremely rare variant of lipoma with osseous and chondroid differentiation. A few cases have been reported in extracranial locations, namely thigh, popliteal fossa, chest wall, mandible and scapula . We report a case of interhemispheric osteochondrolipoma in a 2.5 year old child which was detected antenatally and was masquerading as progressively enlarging teratoma radiologically.…”

Is the treatment for osteochondrolipomas and lipomas the same? Case report and review of the literature on osteochondrolipoma of chest wall

“…Age/Gender Location Size (cm) 1 Gru and Santa Cruz [2] 36/M Chest wall, superficial Small 2 Sunohara et al [3] 59/F Left axilla, infraspinatus muscle 79¥76¥90 mm 3 Nisio et al [4] 49/M Left scapular region 30¥30 mm 4 Panagopoulos et al [5] 55/M Subscapularis muscle Unspecified…”

“…In the second case, [3] there was an enlarging painless mass that was noticed five years before. In the third case, [4] the patient had a palpable painless mass that was noticed a month before (Table 1). In the present case, the patient noticed the lesion 15 years before and it began to grow during the past year.…”

“…Chest wall localization is extremely rare and there are only five cases in the entire literature including this study. [2][3][4][5] In this article, we discuss osteochondrolipomas that are challenging to diagnose in tru-cut or small biopsy specimens and that lack sufficient data on their treatment. Physicians should keep in mind the osteochondrolipoma as a possible diagnosis for a well-defined and calcified/ossified subcutaneous mass in the subscapular region.…”