en Clinical parasitologiy Clinical parasitologiy گزارش مورد Case report <span style="font-size:11pt"><span style="line-height:107%"><span style="font-family:Calibri,sans-serif"><span style="font-size:14.0pt"><strong><span style="background:yellow"><span style="line-height:107%"><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;">&nbsp; &nbsp;Background</span></span></span></span></strong><span style="line-height:107%"><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;">:</span></span></span></span><span style="font-size:12.0pt"><span style="background:yellow"><span style="line-height:107%"><span new="" roman="" style="font-family:" times=""><span style="background-color:#ffffff;"> Hydatidosis</span></span></span></span></span><span style="font-size:12.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times=""> is a parasitic disease caused by the larvae of the genus <i>Echinococcus</i>. <span style="background:yellow"><span style="background-color:#ffffff;">Hydatidosis</span></span> commonly affect the liver and lungs, but can occur in any part of the body, including rare sites like musculoskeletal tissue.</span></span></span></span></span></span><br> <span style="font-size:11pt"><span style="line-height:107%"><span style="font-family:Calibri,sans-serif"><b><span style="font-size:14.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">&nbsp;<span style="background-color:#ffffff;">&nbsp; </span><span style="background:yellow"><span style="background-color:#ffffff;">Case Report</span></span>:</span></span></span></b><span style="font-size:12.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times=""> We reported a case of a 42-year-old male nurse with a painless mass in the anterior region of his right thigh that developed between 2009 and 2023. No history of trauma, lesions, walking difficulties, or impact on daily activities were observed.<span style="background:white"><span style="color:#161719"> He lives in Bandar Abbas, Southern Iran, and was admitted to Abolfazl Hospital in Kashmar. The preoperative diagnosis was lipoma. Blood tests were normal. Both sonography and magnetic resonance imaging detected multiple cysts measuring (140*45 mm) and (144*51*32 mm), respectively.</span></span> Imaging exams showed the size, shape, and location of the cyst. Hydatid cyst was diagnosed after surgery. Histopathological examination confirmed a Hydatid cyst diagnosis.</span></span></span></span></span></span><br> <span style="font-size:11pt"><span style="line-height:107%"><span style="font-family:Calibri,sans-serif"><b><span style="font-size:14.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">&nbsp;&nbsp; <span style="background:yellow"><span style="background-color:#ffffff;">Conclusion</span></span>:</span></span></span></b><span style="font-size:12.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times=""> Hydatid cysts in muscles could occur rarely in muscle (0.5-2.5%). Thus, it&#39;s important to consider <span style="background:yellow"><span style="background-color:#ffffff;">Hydatidosis</span></span> in the differential diagnosis of soft tissue masses in low-prevalence areas.</span></span></span></span></span></span><br> &nbsp; Hydatidosis,Skeletal muscle,Case report,iran,surgery 49 54 http://jbrms.medilam.ac.ir/browse.php?a_code=A-10-861-1&slc_lang=en&sid=1 Amir Hossein Kasaian Naini dr.kassaeian@gmail.com 10031947532846007096 0009-0002-5091-5009 No Orthopedic Surgeon Specialist, Department of Orthopedics, Mashhad University of Medical Sciences, Mashhad, Iran. Sina Salat Sinasalati97@gmail.com 10031947532846007097 10031947532846007097 No Kashmar School of Medical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran. Parastoo Tajzadeh 10031947532846007098 10031947532846007098 No Kashmar School of Medical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran. Siavash Nickfarjam 10031947532846007099 0009-0002-6827-8992 No General Surgeon Specialist, Department of General Surgery, Mashhad University of Medical Sciences, Mashhad, Iran Golnaz Khodadadian 10031947532846007100 0009-0006-1165-1628 No Bachelor of Microbiology, Department of Microbiology, Alzahra University, Tehran, Iran. Mohsen Arefnezhad 10031947532846007101 10031947532846007101 Yes Kashmar School of Medical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran.