en Brain Tumors Case report <div style="text-align: justify;"><span style="font-size:14px;"><span style="line-height:115%"><span sans-serif=""><b><span style="background:white"><span style="line-height:115%"><span new="" roman="" times="">Background and Importance:</span></span></span></b><span style="background:white"><span style="line-height:115%"><span new="" roman="" times=""> </span></span></span></span><span calibri="" style="font-family:"><span style="background:white"><span style="line-height:115%">Rhomboid meningioma (RM) is one of the rare and aggressive types of meningioma, typically classified as a central nervous system grade III anaplastic meningioma by WHO. In this report, we present an unusual case of RM.</span></span></span></span><br> <span style="line-height:115%"><span sans-serif=""><b><span style="background:white"><span style="line-height:115%"><span new="" roman="" times="">Case Presentation:</span></span></span></b><span style="background:white"><span style="line-height:115%"><span new="" roman="" times=""> </span></span></span></span></span><span style="line-height:107%"><span calibri="" style="font-family:"><span style="background:white"><span style="line-height:107%">The patient was a 67-year-old man, living in Kermanshah City, Iran. He came to a neurosurgery clinic with a chief complaint of a huge and unusual mass on his skull. Following the brain computed tomography scan and magnetic resonance imaging, the diagnosis of meningioma was considered. The patient underwent surgical intervention for the excision of the mass. Immunohistochemical findings demonstrated the diagnosis of RM (WHO grade III). </span></span></span></span><br> <span style="background:white"><span style="line-height:normal"><span sans-serif=""><b><span style="background:white"><span new="" roman="" times="">Conclusion:&nbsp; </span></span></b></span><span calibri="" style="font-family:">RM is a rare and aggressive subtype of meningiomas with a high growth rate and poor prognosis. Early diagnosis and treatment especially in invasive ones can prevent many unpleasant and critical complications; although tumor location has a pivotal role in determining treatment strategy.</span></span></span><br> <br> &nbsp;</span></div> Meningioma, Rhabdoid meningioma, CNS tumors, Case report 98 104 http://irjns.org/browse.php?a_code=A-10-677-1&slc_lang=en&sid=1 Iran Chanideh iran.chanideh@kums.ac.ir 100319475328460012363 100319475328460012363 No Clinical Research Development Center, Taleghani and Imam Ali Hospital, Kermanshah University of Medical Sciences, Kermanshah, Iran Masoud Ghadiri ghadiri.masoud93@gmail.com 100319475328460012364 0009-0003-2994-4152 No Students Research Committee, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran Seyed Hamid Madani shmmadani@yahoo.com 100319475328460012365 100319475328460012365 No Molecular Pathology Research Center, Imam Reza Hospital, Kermanshah Universitiy of Medical Science, Kermanshah, Iran Ali Shoghi alish73@ymail.com 100319475328460012366 100319475328460012366 No Clinical Research Development Center, Taleghani and Imam Ali Hospital, Kermanshah University of Medical Sciences, Kermanshah, Iran Sasan Alaghemand sasan.alaghemand.1364@gmail.com 100319475328460012367 0009-0003-6482-456X No Clinical Research Development Center, Taleghani and Imam Ali Hospital, Kermanshah University of Medical Sciences, Kermanshah, Iran Tahereh Mohammadi Majd tahereh_mohammadi@yahoo.com 100319475328460012368 100319475328460012368 No Clinical Research Development Center, Taleghani and Imam Ali Hospital, Kermanshah University of Medical Sciences, Kermanshah, Iran Saeed Gharooee Ahangar saied_gharooee@yahoo.com 100319475328460012369 100319475328460012369 Yes Clinical Research Development Center, Taleghani and Imam Ali Hospital, Kermanshah University of Medical Sciences, Kermanshah, Iran