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Beitragstitel Unusual presentation of cystic echinococcosis: a case report
Beitragscode P084
Autoren
  1. Diane Wernly CHUV & Université de Lausanne Vortragender
  2. Sylvain Steinmetz CHUV, Centre Hospitalier Universitaire Vaudois
  3. Stefano Giulieri CHUV, Centre Hospitalier Universitaire Vaudois
  4. Stéphane Cherix CHUV - Centre hospitalier universitaire vaudois
  5. Olivier Borens Bone and Motion/Hirslanden
Präsentationsform Poster
Themengebiete
  • A07 - Spezialgebiet 2 | Infekte
Abstract Introduction
Alveolar echinococcosis is a rare occurrence in orthopaedics. It is a parasitic infection caused by a tapeworm Echinococcus multilocularis, usually found in dogs and foxes. Humans are only incidental hosts, contaminated by ingested food. Bone involvement is often asymptomatic and results from hematogenous spread from the liver. However, exclusive muscular involvement has never been described before.

Case presentation
We report the case of a 48 – year old male who presented with a progressive atraumatic swelling in his medial thigh. An MRI revealed a multicystic, thick-walled encapsulated lesion (25 x 8 x 6.3 cm) in the vastus intermediaris and the adductor magnus. A surgical biopsy was performed and serology confirmed the diagnosis of Echinococcus multilocularis infection. The patient was treated with surgical resection and peroperative albendazole treatment. After one year of follow-up, the evolution is good and there is no sign of recidive.

Discussion
Due to its infrequent occurrence, the diagnosis of musculoskeletal echinococcosis is challenging, especially in the differential diagnosis of unusual soft tissue lesions. Depending on the localization, different imaging methods are necessary to assess the diagnosis. They can be used in adjunction with the serologic tests. Treatment is also challenging: in our patient, total resection of the cyst and supportive therapy with albendazole were performed successfully.