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      • Record: found
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      Retroperitoneal lipoma, a rare cause of pelvic mass in women

      case-report

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          Abstract

          Background:

          Lipoma is a benign mesenchymal tumor of soft tissue that occurs in almost all parts of the body where fat normally exists. Retroperitoneal lipomas are very infrequent condition with about 20 cases represented in the literature since 1980. They usually present as an abdominal mass or with pressure symptoms to adjacent organs.

          Case Presentation:

          A 66-year-old, post-menopausal woman referred to Imam Hossein Medical Center due to abdominal pain. Abdominopelvic magnetic resonance imaging (MRI) revealed a large mass containing fat component without enhancement on the right side of the pelvis. Tumor markers were within normal ranges. The patient underwent laparotomy and a 12 cm retroperitoneal mass which was located on the iliopsoas muscle with extension into the inguinal canal was resected with pathology report of lipoma. There has been no recurrence after one year of follow-up since surgery.

          Conclusion:

          In the differential diagnosis of retroperitoneal pelvic mass at all ages, lipoma should be considered as a rare cause.

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          Most cited references22

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          Fat-containing Retroperitoneal Lesions: Imaging Characteristics, Localization, and Differential Diagnosis.

          Akram M Shaaban, Maryam Rezvani, Marc Tubay … (2016)
          The complex anatomy of the retroperitoneum is reflected in the spectrum of neoplastic and nonneoplastic conditions that can occur in the retroperitoneum and appear as soft-tissue masses. The presence of fat within a retroperitoneal lesion is helpful in refining the differential diagnosis. Fat is easily recognized because of its characteristic imaging appearance. It typically is hyperechoic at ultrasonography and demonstrates low attenuation at computed tomography (-10 to -100 HU). Magnetic resonance imaging is a more ideal imaging modality because it has better soft-tissue image contrast and higher sensitivity for depicting (a) microscopic fat by using chemical shift imaging and (b) macroscopic fat by using fat-suppression techniques. Whether a lesion arises from a retroperitoneal organ or from the soft tissues of the retroperitoneal space (primary lesion) is determined by examining the relationship between the lesion and its surrounding structures. Multiple imaging signs help to determine the organ of origin, including the "beak sign," the "embedded organ sign," the "phantom (invisible) organ sign," and the "prominent feeding artery sign." Adrenal adenoma is the most common adrenal mass that contains microscopic fat, while myelolipoma is the most common adrenal mass that contains macroscopic fat. Other adrenal masses, such as pheochromocytoma and adrenocortical carcinoma, rarely contain fat. Renal angiomyolipoma is the most common fat-containing renal mass. Other fat-containing renal lesions, such as lipoma and liposarcoma, are rare. Fatty replacement of the pancreas and pancreatic lipomas are relatively common, whereas pancreatic teratomas are rare. Of the primary retroperitoneal fat-containing lesions, lipoma and liposarcoma are common, while other lesions are relatively rare. (©)RSNA, 2016.
          Article 0 comments Cited 30 times – based on 0 reviews     Review now
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            Giant retroperitoneal liposarcoma: A case report and literature review

            Jonas Herzberg, Klaus J. Niehaus, Konstanze Holl-Ulrich … (2019)
            Retroperitoneal liposarcomas are a heterogeneous group of mesenchymal tumours that have a wide spectrum of histological subtypes and vague clinical presentations. Herein, we present the case of a 75-year-old man with anorexia, weight loss of 7 kg, and a growing abdominal circumference within a span of 6 weeks. Computed tomography of the abdomen and pelvis showed a large mass that filled almost the entire abdominal cavity. After consultation with a multidisciplinary tumour board, en bloc resection of the tumour was performed. In addition, the left kidney and a part of the left diaphragm were removed. The tumour measured 35 × 29 × 20.5 cm and weighed 11.6 kg. The histological report confirmed low-grade dedifferentiated liposarcoma with scarce atypical adipocytes, lipoblasts containing spindle cell, pleomorphic, and chondroid components. The patient had uneventful recovery and remained stable during the follow-up period. We report this case to highlight the need for customized surgical oncological measures in the treatment of solid abdominal tumours due to locoregional invasion that usually necessitates en bloc resection.
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              A GIANT RETROPERITONEAL LIPOMA PRESENTING AS A SCIATIC HERNIA: MRI FINDINGS.

              S Duran, M. Cavusoglu, E. Elverici … (2015)
              Sciatic hernia is a rare condition and its clinical diagnosis is uneasy. Herniation of pelvic organs as well as of retroperitoneal neoplasm has been reported in the literature. Sciatica occurs as a result of compression of the sciatic nerve by the herniated sac. We present a case of retroperitoneal lipoma in a patient who had lower leg complaint and describe the imaging findings.
              Article 0 comments Cited 9 times – based on 0 reviews     Review now
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                Author and article information

                Journal
                Journal ID (nlm-ta): Caspian J Intern Med
                Journal ID (iso-abbrev): Caspian J Intern Med
                Journal ID (publisher-id): CJIM
                Title: Caspian Journal of Internal Medicine
                Publisher: Babol University of Medical Sciences (Babol, Iran )
                ISSN (Print): 2008-6164
                ISSN (Electronic): 2008-6172
                Publication date (Print): 2021
                Volume: 12
                Issue: Suppl 2
                Pages: S495-S499
                Affiliations
                [1 ]Department of Gynecology Oncology, Imam Hossein Medical Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
                [2 ]2.Department of Pathology, Imam Hossein Medical Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
                [3 ]3.Department of Obstetrics and Gynecology, Imam Hossein Medical Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
                [4 ]4.Department of Obstetrics and Gynecology, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
                [5 ]5.Department of Radiology, Imam Hossein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
                Author notes
                [* ]Correspondence: Maliheh Arab, Professor of Gyneco-oncology, Imam Hossein Medical Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran. E-mail: drmarab@sbmu.ac.ir, Tel: 0098 2177553112, Fax: 0098 2177553112
                Article
                DOI: 10.22088/cjim.12.0.495
                PMC ID: 8559631
                PubMed ID: 34760114
                SO-VID: 76b8bc6a-40b0-4b2f-87a5-7faf796076d8
                License:

                This is an Open Access article distributed under the terms of the Creative Commons Attribution License, ( http://creativecommons.org/licenses/by/3.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                Date received : 31 December 2020
                Date revision received : 26 February 2021
                Date accepted : 6 April 2021
                Categories
                Subject: Case Report

                Keywords: retroperitoneal lipoma,pelvic mass,fatty tumor
                Data availability:
                Keywords: retroperitoneal lipoma, pelvic mass, fatty tumor

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