Extraskeletal osteochondroma in the nape of the neck: a case report

R Singh, AK Sharma, NK Magu
Department of Orthopaedic Surgery, Pt BD Sharma Post Graduate Institute of Medical Sciences, Rohtak, Haryana, India

KP Kaur
Department of Anaesthesia, Pt BD Sharma Post Graduate Institute of Medical Sciences, Rohtak, Haryana, India

R Sen
Department of Pathology, Pt BD Sharma Post Graduate Institute of Medical Sciences, Rohtak, Haryana, India

S Magu
Department of Radiology, Pt BD Sharma Post Graduate Institute of Medical Sciences, Rohtak, Haryana, India

Extraskeletal osteochondroma in the nape of the neck is rare and its pathological diagnosis is based on radiological and histopathological examination. It is vital that such a diagnosis be considered when a discrete, ossified mass is localised in soft tissues, even at atypical sites. Differential diagnoses include myositis ossificans, a lipomatous lesion, a pseudomalignant osseous tumour, an ossifying fibromyxoid tumour, an extraskeletal chondroma with endochondral ossification, synovial (osteo) chondromatosis, tumoural calcinosis, a synovial sarcoma, and an extraskeletal osteosarcoma. Clinical awareness of this benign entity is important as no malignant transformation or metastasis has been reported. Marginal excision with histopathological identification is the treatment of choice.