IOSR Journal of Dental and Medical Sciences (IOSR-JDMS) e-ISSN: 2279-0853, p-ISSN: 2279-0861.Volume 19, Issue 2 Ser.4 (February. 2020), PP 23-26 www.iosrjournals.org DOI: 10.9790/0853-1902042326 www.iosrjournals.org 23 | Page Chondroblastoma of Calcaneum: A Very Rare Tumour at an Unusual Site 1 Dr.K. Hitesh Akshay Raj, 2 Dr. D. A. V. Suresh, 3 Dr.S. Chandra Sekhar, 4 ,Dr.P. Ashok Kumar 1 Junior resident (JR2), Department of OrthopaedicsAndhra Medical College, Visakhapatnam 2, Junior resident(JR3), Department of OrthopaedicsAndhra Medical College, Visakhapatnam, 3 Associate Professor, Department of OrthopaedicsAndhra Medical College, Visakhapatnam. 4 Professor, Department of OrthopaedicsAndhra Medical College, Visakhapatnam. Professor and HOD, Department of OrthopaedicsAndhra Medical College, Visakhapatnam Abstract: Chondroblastoma is a rare, benign primary cartilage producing tumour of bone that accounts for approximately 1% of bone tumours. The usual sites are the epiphyseal ends of long bones. Herewith we report a case of a 13 year old male with pain and swelling in right foot since eight months. It was diagnosed radiologicallyas chondroblastoma of calcaneus and was confirmed on histopathology. Chondroblastoma of calcaneus is a rare tumour at a rare site and should always be included in the tumours involving calcaneum. Keywords: Chondroblastoma, calcaneum --------------------------------------------------------------------------------------------------------------------------------------- Date of Submission: 20-01-2020 Date of Acceptance: 10-02-2020 --------------------------------------------------------------------------------------------------------------------------------------- I. Introduction Chondroblastoma is a benign, cartilage producing neoplasm usually arising in the epiphyses of skeletally immature patients. Chondroblastoma accounts for less than 1% of all bone tumours. In 1931, Codman classified it as a chondromatous variant of giant cell tumour when he described these lesions in the proximal humerus. Tumor seems to arise from secondary centres of ossification and the cell of origin arises from the epiphyseal plate or some remnant of it. About 12% of all chondroblastoma occur in the bones of the foot. Chondroblastoma in the foot most commonly occurs in subchondral areas of the talus and calcaneal apophysis. In chondroblastoma of the foot and ankle, recurrence is common, and outcomes are generally worse than in other locations in the skeleton. Few cases of Chondroblastoma of calcaneus have been reported. Wherewith we reported a case of chondroblastoma of calcaneus in a 13 year old male with the clinical presentation, histological diagnosis and treatment by curettage. II. Case Report A 13 year old male presented to the outpatient department with complaints of swelling and pain in ankle since eight months. The pain was insidious in onset and dull aching which aggravated on walking. There washistory of trauma eight months back. On clinical examination, the swelling was firm in consistency. Tenderness was present on the medial aspect of calcaneum and there was no local rise of temperature. The skin over the swelling was normal. Radiology X-ray of ankle revealed alytic lesion in the anterior process of calcaneum, below sinus tarsi with sclerotic rim. Figure 1. X ray ankle AP and Lateral views.