title: An unusual cause of mass in the shoulder: A primary hydatid cyst.
abstract: A hydatid cyst is a zoonotic infection which may affect any organ and tissue, particularly the liver and the lung. Primary muscular hydatid cysts comprise less than 0.7-3% of the cases. The hydatid cysts must be kept in mind to avoid a diagnostic puncture in cystic lesions to avoid the spreading of the disease. In this case report, we present an exceptionally rare case with an unusual localization of a primary hydatid cyst in the left deltoid muscle.
authors.affiliation: Department of Orthopaedics and Traumatology, Ankara Numune Training and Research Hospital, Ankara, Turkey.
authors.forename: Serdar
authors.initials: S
authors.lastname: Yilmaz
authors.affiliation: Department of Orthopaedics and Traumatology, Ankara Numune Training and Research Hospital, Ankara, Turkey.
authors.forename: Murat
authors.initials: M
authors.lastname: Gulcek
authors.affiliation: Department of Orthopaedics and Traumatology, Ankara Numune Training and Research Hospital, Ankara, Turkey.
authors.forename: Yunus
authors.initials: Y
authors.lastname: Demirtas
authors.affiliation: Department of Orthopaedics and Traumatology, Ankara Numune Training and Research Hospital, Ankara, Turkey.
authors.forename: Sualp
authors.initials: S
authors.lastname: Turan
keywords: Daughter cyst; deltoid muscle; germinative membrane; hydatid cyst; scolices
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