Primary hydatid cyst of muscle-a rare cause of mass in the shoulder: a case report


  • Gaurav Chhaya Shivam Medicare Clinic, Ahmedabad, Gujarat, India
  • Deval K. Shah Swastik Surgical Hospital and Dental Clinic, Ahmedabad, Gujarat, India
  • Hiren Prajapati Medical Affairs, Eris Lifesciences Ltd. Ahmedabad, Gujarat, India
  • Mayank Rajawat Medical Affairs, Eris Lifesciences Ltd. Ahmedabad, Gujarat, India



Infraspinatous muscle, Hydatid cyst, Echinococcosis


Hydatid cyst also called as cystic echinococcosis is a parasitic zoonotic infection caused by Echinococcus granulosus. Humans get infected by this parasite by consumption of contaminated food with dog faeces or by direct contact with animal and it particularly affecting liver and lung. However, cases of primary muscle hydatid are about 5%. In India, reported cases of primary muscle hydatids are very rare. In this case report, we presented an exceptional rare case of unusual primary hydatid cyst localized in infraspinatous muscle of scapular region.


Tekin R, Avci A, Tekin RC, Gem M, Cevik R. Hydatid cysts in muscles: clinical manifestations, diagnosis, and management of this atypical presentation. Rev Soc Bras Med Trop. 2015;48(5):594-8.

Yilmaz S, Gulcek M, Demirtas Y, Turan S. An unusual cause of mass in the shoulder: A primary hydatid cyst. Int J Shoulder Surg. 2014;8(2):58-60.

Gougoulias NE, Varitimidis SE, Bargiotas KA, Dovas TN, Karydakis G, Dailiana ZH. Skeletal muscle hydatid cysts presenting as soft tissue masses. Hippokratia. 2010;14(2):126-30.

Deplazes P, Rinaldi L, Alvarez Rojas CA, Torgerson PR, Harandi MF, Romig T, et al. Global Distribution of Alveolar and Cystic Echinococcosis. Adv Parasitol. 2017;95:315-493.

Arora V, Nijjar IS, Gill KS, Singh G. Case report: primary hydatid cyst of muscle – a rare site. Indian J Radiol Imaging. 2006;16(2):239-41.

Babu KS, Goel D, Prayaga A, Rao IS, Kumar A. Intraabdominal hydatid cyst: a rare case report. Acta Cytol. 2008;52(4):464-6.

Rao NM, Shanthi V, Ramakrishna BA, Chaitanya B, Sekhar BH. Anterior abdominal wall hydatid: a rare case report. J Biosci Technol. 2011;2(4):349-52.

Shanthi V, Rao NM, Lavanya G, Krishna BR, Muralimohan KV. Splenic hydatid cyst: a rare site of presentation. J Biosci Tech. 2011;2(6):436-8.

Malik AA, Bari S, Younis M, Wani KA, Rather AA. Primary splenic hydatidosis. Indian J Gastroenterol. 2011;30(4):175-7.

Rao SS, Mehta B, Narang R. The spectrum of hydatid disease in rural central India: an 11-year experience. Ann Trop Med Public Health. 2012;5(3):225-30.

Usharani A, Deepica G, Aruna S, Kulkarni S, Sai Kamal Kumar G, Balamuralikrishna P. Case reports of hydatid disease. J Epidemiol Glob Health. 2013;3(2):63-6.

Di Gesu G, Picone A, La Bianca A, Massaro M, Vetri G. Muscular and subcutaneous hydatidosis. Minerva Medica. 1987;78(12):835-40.

Derbel F, Ben M, Hadj Hamida MB, Mazhoud J, Youssef S, Ben A, et al. Hydatid Cysts of the Liver - Diagnosis, Complications and Treatment. Abdominal Surgery. 2012.

Toğral G, Arıkan ŞM, Ekiz T, Kekeç AF, Ekşioğlu MF. Musculoskeletal Hydatid Cysts Resembling Tumors: A Report of Five Cases. Orthop Surg. 2016;8(2):246-52.

Torgerson PR, Deplazes P. Echinococcosis: diagnosis and diagnostic interpretation in population studies. Trends Parasitol. 2009;25(4):164-70.

Arazi M, Erikoglu M, Odev K, Memik R, Ozdemir M. Primary echinococcus infestation of the bone and muscles. Clin Orthop Relat Res. 2005;432:234-41.






Case Reports