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Inguinal Endometriosis Visualized on I-131 Whole Body Scan


  • Derya Çayır
  • Mine Araz
  • Mahmut Apaydın
  • Erman Çakal

Received Date: 27.04.2017 Accepted Date: 15.10.2017 Mol Imaging Radionucl Ther 2018;27(1):52-54 PMID: 29393056

We present a rare case with inguinal iodine-131 (I-131) uptake on whole body scan. The patient was suffering from a painful right inguinal mass during menstrual period, which was later sonographically and histopathologically confirmed to be an inguinal focus of endometriosis. Endometriosis is a previously reported site of radioiodine uptake and detection of radioiodine uptake in the inguinal region has also been described. Nevertheless, to the best of our knowledge, this is the first case report of I-131 uptake in an inguinal endometriosis focus. History and physical examination of the patient are both very important in identifying the etiology of the ectopic uptake sites on I-131 whole body scan, and inguinal endometriosis should be kept in mind while reporting inguinal radioiodine uptake on I-131 whole body scan.

Keywords: Endometriosis,whole body imaging,iodine-131


Informed Consent: Consent form was filled out by all participants.

Peer-review: Externally peer-reviewed.

Authorship Contributions

Surgical and Medical Practices: D.Ç., M.A., M.A., E.Ç., Concept: D.Ç., Design: D.Ç., M.A., Data Collection or Processing: D.Ç., M.A., Analysis or Interpretation: D.Ç., M.A., Literature Search: D.Ç., Writing: D.Ç.

Conflict of Interest: No conflict of interest was declared by the authors.

Financial Disclosure: The authors declared that this study received no financial support.


1.    D’Hooghe TM, Hill JA. Endometriosis. In: Berek SJ, Adashi EY, Hillard PA, eds. Novak’s Gynecology, 12th ed. Baltimore: Williams&Wilkins;1996;887-915.
2.    Bergqvist A. Extragenital endometriosis. Eur J Surg 1992;158:7-12.
3.    Tarım E, Bağış T, Tarım A, Kıllıcıdağ EB, Noyan T, Kayaselçuk F. İnguinal endometriozis: bir olgu sunumu. Türkiye Klinikleri J Gynecol Obst 2002;12:184-185.
4.    Dwivedi AJ, Agrawal SN, Silva YJ. Abdominal wall endometriomas. Dig Dis Sci 2002;47:456-461.
5.    Blanco RG, Parithivel VS, Shah AK, Gumbs MA, Schein M, Gerst PH. Abdominal wall endometriomas. Am J Surg 2003;185:596-598.
6.    Kaushik R, Gulati A. Inguinal endometriosis: A case report. J Cytol 2008;25:73-75.
7.    Garger YB, Winfeld M, Friedman K, Blum M. In thyroidectomized thyroid cancer patients, false-positive I-131 whole body scans are often caused by inflammation rather than thyroid cancer. J Investig Med High Impact Case Rep 2016;4:2324709616633715.
8.    Hannoush ZC, Palacios JD, Kuker RA, Casula S. False Positive Findings on I-131 WBS and SPECT/CT in Patients with History of Thyroid Cancer: Case Series. Case Rep Endocrinol 2017;2017:8568347.