T he occurrence of a giant-cell tumor (GCT) in the small bones of the foot is rare. Two studies have shown incidences of 1% and 2% 1,2 . The younger age of patients with a GCT in the foot, compared with those with tumor in the long bones, as well as a multifocal trend and a higher recurrence rate have been stressed in the literature 3 . In one study, eighteen of twenty-one GCTs that involved the foot were distributed in the tarsal bones, with a noteworthy number of cases in the talus 4 . Although metatarsal lesions were rare in that series, several cases of single or double metatarsal reconstruction in patients with GCT have been reported in the literature 5-7 .The proposed treatments for GCTof the foot are curettage and bone-grafting as well as marginal or wide excision; however, wide excision is usually impossible to achieve without performing an amputation 8 . Some authors have recommended that en bloc resection and bone-grafting be used as the first line of treatment for GCT in suitable sites 5 . The reconstruction techniques include the use of allografts or large autogenous grafts with fusion 6,7,9 .We present a case of a large, aggressive GCT that originated in the medial cuneiform. It destroyed the adjacent cuneiforms as well as the first, second, and third metatarsal bases. We treated the patient with a marginal en bloc resection of the medial two cuneiforms and the proximal two-thirds of the first and second metatarsals combined with a partial excision of the medial halves of the lateral cuneiform and the third metatarsal base. The resultant osseous defect was reconstructed with a large iliac strut graft and fixation with multiple plates and screws. The midterm clinical results with radiographic features are reported with a review of the literature. The patient was informed that data concerning the case would be submitted for publication, and she consented.
Case ReportA twenty-five-year-old woman presented with a painful mass of the right foot, which had been gradually enlarging over a fourteen-month period. On physical examination, a 6 · 5-cm tender mass was observed on the dorsomedial aspect of the midfoot (Fig. 1). Radiographs demonstrated a large osteolytic lesion involving the medial and intermediate cuneiforms and the first and second metatarsal bases (Figs. 2-A and 2-B). A radiograph obtained at another hospital ten months earlier revealed a poorly defined osteolytic lesion within the medial cuneiform, and initially the patient had been treated nonoperatively for osteomyelitis. On presentation to our hospital, standing lateral radiographs of the feet also revealed that the patient had a moderate cavus foot deformity bilaterally. Magnetic resonance imaging (MRI) demonstrated a large expansile mass of low signal intensity on the T1-weighted images and mixed signal intensity on the T2-weighted images; the mass had infiltrated the medial two cuneiforms and the corresponding metatarsal bases Fig. 1