Journal of Postgraduate Medicine
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CASE REPORT
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Year : 2002  |  Volume : 48  |  Issue : 2  |  Page : 127-8  

Coexisting chondroblastoma and osteochondroma: a case report.

D Pardiwala, M Agarwal, A Puri, S Vyas 
 Bone and Soft Tissue Service, Department of Surgery, Tata Memorial Hospital, Parel, Mumbai - 400 012, India., India

Correspondence Address:
D Pardiwala
Bone and Soft Tissue Service, Department of Surgery, Tata Memorial Hospital, Parel, Mumbai - 400 012, India.
India

Abstract

The coexistence of two different types of benign cartilaginous tumours of bone in the same patient has not been reported in literature. We report a case in which a sixteen-year-old male had a benign chondroblastoma of the proximal left humerus and an osteochondroma of the distal left femur. Both originated at the same time and had a progressive increase in size with growth.



How to cite this article:
Pardiwala D, Agarwal M, Puri A, Vyas S. Coexisting chondroblastoma and osteochondroma: a case report. J Postgrad Med 2002;48:127-8


How to cite this URL:
Pardiwala D, Agarwal M, Puri A, Vyas S. Coexisting chondroblastoma and osteochondroma: a case report. J Postgrad Med [serial online] 2002 [cited 2019 Dec 8 ];48:127-8
Available from: http://www.jpgmonline.com/text.asp?2002/48/2/127/128


Full Text

Benign chondromatous tumours of bone include a rather diverse group of lesions arising both from within bones (enostotic) and from the surface of bones (exostotic). In conditions like Diaphyseal Aclasis (osteochondromatosis) and Ollier’s Disease (enchondromatosis), similar cartilage tumours arise at multiple sites. Though some theories have been put forth explaining common pathogenic factors, to the best of our knowledge, the coexistence of two different types of benign cartilaginous tumours of bone in the same patient has not been reported in literature.

We report a case in which a sixteen-year-old male had a benign chondroblastoma of the proximal left humerus and an osteochondroma of the distal left femur. Both originated at the same time and had a progressive increase in size with growth.


  ::   Case historyTop


A sixteen year old male presented with complaints of two swellings over his body; one in the region of his left shoulder, and another just proximal to his left knee on the medial aspect. Both swellings were first noticed at thirteen years of age and had gradually progressed in size over the past three years. Although the shoulder swelling had been painful for over a year now and had caused significant loss of shoulder function, the swelling proximal to his left knee had become painful following trivial local trauma a month prior to presentation.

A radiograph of the left shoulder revealed an osteolytic lesion of the proximal epi-metaphyseal region of the humerus with a sclerotic border and narrow zone of transition. Located centrically, it demonstrated punctate calcifications and a periosteal reaction. The superior part of the humeral head showed large cortical discontinuity with destruction of a portion of articular surface. A CT scan of the region [Figure:1] besides delineating the extent of destruction, revealed cortical discontinuity and a soft tissue component with heterogeneous enhancement around the peripheral aspect of the large tumour.

A radiograph of the left knee and femur [Figure:2] revealed a classical pedunculated exostosis arising from the medial aspect of the distal femoral metaphysis.

A Needle biopsy of the proximal humeral swelling revealed a benign chondroblastoma showing occasional multinucleate giant cells. The femoral exostosis was not subjected to a preoperative biopsy.

The patient underwent a wide excision of the proximal end of humerus with a live vascular fibula transfer. The fibular head was arthrodesed with the glenoid and the entire construct was fixed with a long 4.5 mm. narrow plate. The femoral exostosis underwent a marginal extracapsular resection that included the entire cartilagenous cap and overlying perichondrium and periosteum.

Histopathological examination of the tissues confirmed a benign chondroblastoma of the proximal humerus and an osteochondroma of the distal femur. The chondroblastoma demonstrated peripheral cortical destruction with soft tissue extension and fifty percent destruction of the humeral articular surface.

The patient made an unremarkable recovery and has satisfactory function of his shoulder arthrodesis with no recurrence of either tumour at a two year follow-up.


  ::   DiscussionTop


The differential diagnosis for coexisting multiple tumours is: skeletal malformations like diaphysial aclasis, or Olliers disease where multiple similar tumours are present throughout the skeleton; malignancy developing in one of the multiple tumours like in multiple exostoses or neurofibromatosis; metastasis from a primary malignant tumour; multifocal tumours such as occasionally in giant cell tumour or osteosarcoma; giant cell tumour developing in an aneurysmal bone cyst; and bery rarely two different tumours.

Osteochondroma and chondroblastoma are similar neoplasms in that both are benign chondral tumours of bone, the cells of which exhibit a staining reaction for S-100 protein.[1] Although tubulin is detected in both chondroblastomas and osteochondromas, tau expression is absent in both these tumors.[2] There are theories related to anatomic considerations and pathogenesis. The physeal plate has been implicated in the aetiology of both tumours and they are believed to derive from displaced cartilage germ cells.[3],[4]

The locally aggressive variety of benign chondroblastoma (as shown in this case report) is well documented in literature.[5],[6],[7] We however could not find a single case in which two benign cartilage tumours of bone coexisted in the same patient. This is interesting considering that both neoplasms having a common pathogenetic origin (from the physeal plate) progressed to two different pathological entities at two different sites in the same patient.

References

1Greenspan A. Tumors of cartilage origin. Orthop Clin North Am. 1989; 20:347-66.
2Hu B, McPhaul L, Cornford M, Gaal K, Mirra J, French SW. Expression of tau proteins and tubulin in extraskeletal myxoid chondrosarcoma, chordoma, and other chondroid tumors. Am J Clin Pathol 1999; 112:189-93.
3Jaffe HL, Lichtenstein L. Benign chondroblastoma of bone: a reinterpretation of the so-called calcifying or chondromatous giant cell tumour. Am J Pathol 1942;18:969- 91.
4Brien EW, Mirra JM, Kerr R. Benign and malignant cartilage tumors of bone and joint: their anatomic and theoretical basis with an emphasis on radiology, pathology and clinical biology. I. The intramedullary cartilage tumors. Skeletal Radiol 1997;26:325-53.
5Dahlin DC, Ivins JC. Benign chondroblastoma. A study of 125 cases. Cancer 1972;30:401-13.
6Hull MT, Gonzalez—Crussi F, DeRosa GP, Graul RS. Aggressive chondroblastoma. Report of a case with multiple bone and soft tissue involvement. Clin Orthop 1977;261-5.
7Schajowicz F, Gallardo H. Epiphysial chondroblastoma of bone. A clinico- pathological study of sixty-nine cases. J Bone Joint Surg Br 1970;52:205-26.

 
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