{"paper_id":"0c8ee011-2120-44d2-bb1c-9a29e6a1ea1f","body_text":"Abstract\nObjective\nThe purpose of this study was to describe the MR imaging findings of Nuck canal endometriosis (NCE).\nMaterials and methods\nIn a 10-year period, 486 out of 612 patients, with laparoscopically and/or surgically proven diagnosis of pelvic endometriosis, underwent MR imaging examination. The examinations were reviewed by two urogenital experienced radiologists working in consensus. Data analysis included: lesions location, size, morphological and signal intensity pattern, involvement of the adjacent muscles, and tendons.\nResults\nIn 372 out of 486 patients an MRI diagnosis of endometriosis was made. NCE was found in eight patients. All the lesions were located on the right side. The mean size of the lesions was 2.5 cm (range 1.5–4.5 cm). Two patterns of NCE were found: type 1, prevalently cystic (n = 2); and type 2, prevalently solid with small scattered cysts within lesion (n = 6). In all the patients, hemorrhagic hyperintense cysts could be seen on T1-weighted images. In four patients, the lesions involved the inguinal canal, and in another four patients, the lesions were only outside the inguinal canal. Involvement of the abdominis rectus muscle was seen in two patients, and of the adductor common tendon in two patients.\nConclusion\nMR imaging permits the diagnosis of NCE as well as the evaluation of exact extension of the disease.\nSimilar content being viewed by others\nReferences\nWoodward PJ, Sohaey R, Mezzetti TP (2001) Endometriosis: radiologic-pathologic correlation. Radiographics 21:193–216\nHensen JHJ, Van Breda Vriesman AC, Puylaert JBCM (2006) Abdominal wall endometriosis: clinical presentation and imaging features with emphasis on sonography. AJR 186:616–620\nHottat N, Larrousse C, Anaf V, et al. (2009) Endometriosis: contribution of 3.0-T pelvic MR imaging in preoperative assessment-initial results. Radiology 253:126–134\nKirkpatrick A, Reed CM, Bui-Mansfield C, Russel MJ, Whitford W (2006) Endometriosis of the canal of Nuck. AJR 186:56–57\nKuligowska E, Deeds L, Lu K (2005) Pelvic pain: over-looked and underdiagnosed gynecologic conditions. Radiographics 25:3–20\nBis KG, Vrachliotis TG, Agrawal R, et al. (1997) Pelvic endometriosis: MR imaging spectrum with laparoscopic correlation and diagnostic pitfalls. Radiographics 17:639–655\nBusard MPH, Mijatovic V, van Kuijk C, Hompes PGA, van Waesberghe JHTM (2009) Appearance of abdominal wall endometriosis on MR imaging. Eur Radiol doi:10.1007/s00330-009-1658-1\nShadbolt CL, Heinze SBJ, Dietrich RB (2001) Imaging of groin masses: inguinal anatomy and pathologic conditions revisited. Radiographics 21:261–271\nBhosale PR, Patnana M, Viswanathan C, Szklaruk J (2008) The inguinal canal: anatomy and imaging features of common and uncommon masses. Radiographics 28:819–835\nStrasser EJ, Davis RM (1977) Extraperitoneal inguinal endometriosis. Am Surg 43:421–422\nHagiwara Y, Hatori M, Moriya T, et al. (2007) Inguinal endometriosis attaching to the round ligament. Australas Radiol 51:91–94\nLow RS, Jones AO, Houang M, et al. (2007) Endometriosis of the inguinal region: magnetic resonance imaging (MRI) findings. Australas Radiol 51(Suppl):B272–B275\nDucarme G, Uzan M, Poncelet C (2007) Endometriosis mimicking hernia recurrence. Hernia 11:175–177\nLicheri S, Pisano G, Erdas E, et al. (2005) Endometriosis of the round ligament: description of a clinical case and review of the literature. Hernia 9:294–297\nLee JC, Meirion Thomas J, Philips S, Fisher C, Moskovic E (2006) Aggressive fibromatosis: MRI features with pathologic correlation. AJR 186:247–254\nDinauer PA, Brixey CJ, Moncur JT, Fanburg-Smith JC, Murphey MD (2007) Pathologic and MR imaging features of benign fibrous soft-tissue tumors in adults. Radiographics 27:173–187\nCervini P, Mahoney J, Wu L (2005) Endometriosis in the canal of Nuck: atypical manifestations in an unusual location. AJR 85:284–285\nYang DM, Kim HC, Ryu JK, Lim JW, Kim GY (2010) Sonographic findings of inguinal endometriosis. J Ultrasound Med 29:105–110\nYang DM, Kim HC, Jin W, et al. (2007) Inguinal endometriosis presenting as a multicystic mass on sonography. J Ultrasound Med 26:1449–1451\nTogashi K, Nishimura K, Kimura I, et al. (1991) Endometrial cysts: diagnosis with MR imaging. Radiology 180:73–78\nTakeuchi M, Matsuzaki K, Kubo H, Nishitani H (2008) Magnetic resonance manifestations of endometrial cysts at 3T compared with 1.5 T. J Comput Assist Tomogr 32:369–371\nHarish S, Lee JC, Ahmad M, Saifuddin A (2006) Soft tissue masses with “cyst-like’’ appearance on MR imaging: distinction of benign and malignant lesions. Eur Radiol 16:2652–2660\nPark SJ, Lee HK, Hong HS, et al. (2004) Hydrocele of the canal of Nuck in a girl: ultrasound and MR appearance. Br J Radiol 77:243–244\nGielen JLMA, De Schepper AMA, Parizel PM, Wang XL, Vanhoenacker F (2003) Additional value of magnetic resonance with spin echo T1-weighted imaging with fat suppression in characterization of soft tissue tumors. J Comput Assist Tomogr 27:434–441\nFedele L, Bianchi S, Frontino G, Zanconato G, Rubino T (2007) Radical excision of inguinal endometriosis. Obstet Gynecol 110:530–533\nAuthor information\nAuthors and Affiliations\nCorresponding author\nRights and permissions\nAbout this article\nCite this article\nGaeta, M., Minutoli, F., Mileto, A. et al. Nuck canal endometriosis: MR imaging findings and clinical features. Abdom Imaging 35, 737–741 (2010). https://doi.org/10.1007/s00261-010-9607-7\nPublished:\nIssue date:\nDOI: https://doi.org/10.1007/s00261-010-9607-7","source_license":"CC0","license_restricted":false}