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Open Access Case report

Pathological femoral neck fracture caused by an echinococcus cyst of the vastus lateralis - case report

János Csotye1, Krisztián Sisák2*, Loránt Bardócz1 and Kálmán Tóth2*

Author Affiliations

1 Department of Traumatology, Békés County Hospital, 1 Semmelweis Street, Gyula, 5700, Hungary

2 Department of Orthopaedics, University of Szeged, 6 Semmelweis Street, Szeged, 6720, Hungary

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BMC Infectious Diseases 2011, 11:103  doi:10.1186/1471-2334-11-103

Published: 21 April 2011

Abstract

Background

Musculoskeletal hydatid cysts are rare, but being locally invasive, can potentially cause significant deformity or pathological fracture.

Case presentation

A 39 y.o. male presented to our orthopaedic outpatient clinic complaining of severe right hip pain, and inability to ambulate. Symptoms were not preceded by trauma. Subsequent imaging confirmed a large, 17 × 3 × 5 cm echinococcus cyst in the vastus lateralis, causing erosion of the proximal metaphysis of the femur. As a consequence the patient suffered a non-traumatic pathological intertrochanteric femur fracture. The patient was treated with an en-bloc excision of the lesion - the affected soft tissue envelope containing the large cyst - and as a second surgical step a cemented total hip replacement (THR) was implanted under the same anaesthetic.

The manuscript reviews the literature regarding musculoskeletal hydatid disease.

Keywords:
echinococcus; cyst; femur; fracture; prosthesis