Giant cell reparative granuloma (GCRG) is a rare, benign intra osseous lytic lesion occurring especially in gnathis bone but also seen in feet and hands. It has similar clinical and radiological presentations than giant cell tumor, chondroblastoma, aneurysmal bone cyst, and hyperparathyroidism brown tumors but with specific histological findings We report a case of a GCRG of hallux phalanx in 18 years old patient appearing many years after enchondroma curettage and grafting. Radiographs showed a multiloculated osteolytic lesions involving whole phalanx with cortical thinning and without fluid-fluid levels in CT view. Expected to be an enchondroma recurrence, second biopsy confirmed diagnosis of GCRG with specific histological findings. Although if aetiopathogeny remains unknown, GCRG is reported to be a local non neoplasic reaction to an intraosseous hemorrhage. Our exceptional case claims that this tumor can appear in reaction to cellular disturbance primary or secondary.
Osteochondroma is a benign bone tumor developing especially in long bone metaphysis in children. It can be involved in hereditary multiple exostoses disease (HME) or an isolated tumor. It rarely develops in spine and pelvis. We report a rare localization of a voluminous osteocnondroma developing from iliac crest in a five-year-old child initially followed for HME. In clinical exam this mass was hard, immobile but not adherent to the overlying skin. No hip joint stiffness was observed.X ray showed a pedenculated tumor with high-density and clear boundarie developing from ilium lateral fossa. This exam revealed also smaller asymptomatic exostoses in distal femur and proximal tibia. CT scan showed a "cauliflower like" tumor. The child complains from pain while lying in a right side and when wearing trousers. En-bloc excision was performed by direct approach. Histological study confirms diagnosis showing a cartilage cap and abundant cellular hyaline cartilage and chondrocytes. There was no recurrence at two years follow up and the child is regularly seen in outpatient department for the other osteochondroma locations.
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