|Year : 1980 | Volume
| Issue : 4 | Page : 259-60
Benign chondroblastoma (in the metaphysis of the femoral neck)--(a case report).
SA Nimbkar, SY Sane, CG Pradhan
S A Nimbkar
|How to cite this article:|
Nimbkar S A, Sane S Y, Pradhan C G. Benign chondroblastoma (in the metaphysis of the femoral neck)--(a case report). J Postgrad Med 1980;26:259-60
|How to cite this URL:|
Nimbkar S A, Sane S Y, Pradhan C G. Benign chondroblastoma (in the metaphysis of the femoral neck)--(a case report). J Postgrad Med [serial online] 1980 [cited 2022 Sep 28 ];26:259-60
Available from: https://www.jpgmonline.com/text.asp?1980/26/4/259/944
This rare primary tumour of the bone, previously called epiphyseal chondromatous giant cell tumour by Codman (1931) was defined by Jaffe and Lichenstein (1942) and was renamed as benign chondroblastoma. The epiphysis is almost always involved and the tumour expands from epiphysis into the adjacent metaphysis. Primary location of the lesion on the metaphyseal side of enchondral plate without affecting the epiphysis is extremely infrequent.
S.S.P. a 17 year old female was admitted to our hospital on 5th June 1978 for pain in the right hip joint and limping for a period of one year. Pain was dull, aching in character and there was no radiation. Patient did not have any history of trauma.
On examination, right hip was in the attitude of flexion. There was tenderness over the right trochanter. All the movements of the right hip joint were painful. All the laboratory investigations were within normal limits.
Clinically the case was diagnosed as malunited fracture neck femur or fibrous ankylosis following old arthritis.
Roentgenographic examination [Fig. 1] showed a radiolucent area in the neck of the femur with mottled appearance which obscured its outline. Articular surface and eplphysis appeared normal.
Replacement arthroplasty of right hip was done. Resected head of the femur and curettings from neck were studied for histopathology. Post-operative course was uneventful.
Head and neck of the femur was studied along with the curetted material from the neck [Fig. 2]. The curetted material was soft to firm in consistency and reddish brown in colour with papillary appearance. There were areas of degeneration, cystic changes and irregular calcium deposition. Head of the femur showed normal articular surface. Part of the head showed similar appearance to that of the curetted material.
Histological examination [Fig. 3]
The tumour was composed of spheroid or polygonal cells with hyperchrcmatic nuclei and moderate amount of eosinophilic cytoplasm. In some areas there was recognizable chondroid differentiation while in other areas, there was mature cartilage formation. There were scanty number of giant cells and a few areas showing powdery calcium deposition.
Benign chondroblastoma is a neoplasm of chondrogenic origin occurring predominantly in the epiphysis of long bones during the second decade of life. A primary metaphyseal origin or location seems to be exceptional. Four major series of chondroblastomas include 258 cases, of which only five were in the metaphysis of long bones., , .  In these five, only one was reported in the neck of the femur by Schajowicz and Gallardo. Another case was reported by Fachner and Wilde occurring in the metaphysis of the femoral neck. Two other metaphyseal lesions are reported in small series by Sherman and Urel and Salzer and associates.
All of the reported metaphyseal lesions were treated initially by curettage. One patient had a recurrence two years later and the extremity was amputed. Our case was treated with curettage and resection of the head and neck of the femur. The patient is well after 6 months.
We are thankful to Dr. C. K. Deshpande, Dean and Dr. (Smt) S. G. Kinare, Professor of Pathology, Seth G. S. Medical College and K.E.M. Hospital, Bombay for allowing us to publish the case.