Hydatid disease of the tarsal bones. A case report.

Hydatid disease is caused by the larval form of the tapeworm Echinococcus. Osseous cysts are rare and very few cases of foot infestation have been reported. We present the case of a 51-year-old woman who developed a palpable mass at the medial dorsal aspect of the right midfoot. Radiological examination showed cystic lesions in the cuneiforms and the navicular. The lesion was explored and several small cysts containing clear fluid were found. They were evacuated and the bone was curetted. The diagnosis of E. granulosus infestation was made histologically. After 15 years' follow-up there were no signs of recurrence. Osseous echinococcosis is a rare disease that may present as infective or neoplastic pathology. A high index of suspicion is necessary for its diagnosis, especially in patients who live in or travel to sheep-raising areas where hydatid disease is endemic.

Perilunate dislocations and fracture-dislocations. Closed and early open reduction compared in 28 cases.

27 patients (28 cases), were treated for perilunate dislocations in 20 and fracture-dislocations in 8. Capitate displacement was dorsal in 27 cases and palmar in 1 case, and in 16, the scaphoid was fractured. There was no substantial delay of treatment. In 8 patients treated with closed reduction, follow-up averaged 6 (1-15) years. 19 patients (20 cases) who underwent early open reduction with K-wire stabilization and ligamentous repair, had an average follow-up of 2 (0.5-7) years. The clinical outcome was evaluated using a scoring system based on pain, occupation, ROM and grip strength, while the radiographic outcome was assessed according to findings of carpal instability, nonunion of scaphoid, and/or arthrotic changes. In patients treated with closed reduction, results were fair in 3 and poor in 5, while patients treated with early open reduction had a better clinical score with 4 excellent, 9 good, 3 fair and 4 poor results. These findings suggest that perilunate fracture-dislocations are too unstable to be treated with closed reduction. In addition, a combined approach was found effective in the management of dorsal perilunate dislocations. Finally, open reduction presupposes reparation of the torn scapholunate ligament, to obtain normal carpal kinematics.