{"paper_id":"666ad2fd-0497-4010-854e-95e85248814c","body_text":"Abstract\nAlthough endometriosis is a relatively common condition in women of reproductive age, skeletal endometriosis is rare. Among them, endometriosis in the upper extremity is extremely rare and, to the best of our knowledge, there has been only one case report of endometriosis in the upper extremity published in the English literature. We successfully treated a case of endometriosis in the deltoid muscle in a 23-year-old woman with complete surgical excision and has no recurrence for 72 months after surgery.\nReferences\nWoodward PJ, Sohaey R, Mezzetti TP Jr (2001) Endometriosis: radiologic-pathologic correlation. Radiographics 21:193–216 questionnaire 288–194\nBerek JS (2003) Novak’s Gynecology. Lippincott Williams & Wilkins, NY\nGiangarra C, Gallo G, Newman R, Dorfman H (1987) Endometriosis in the biceps femoris. A case report and review of the literature. J Bone Joint Surg Am 69:290–292\nAron SE (1957) Endometriosis in the region of the deltoid muscle. Arkh Patol 19:67–68\nPatel VC, Samuels H, Abeles E, Hirjibehedin PF (1982) Endometriosis at the knee. A case report. Clin Orthop Relat Res 171:140–144\nDas Gupta S, Pal SK, Saha PK, Dawn CS (1985) Endometriosis in the thumb. J Indian Med Assoc 83:122–123\nGitelis S, Petasnick JP, Turner DA, Ghiselli RW, Miller AW 3rd (1985) Endometriosis simulating a soft tissue tumor of the thigh: CT and MR evaluation. J Comput Assist Tomogr 9:573–576\nOei SG, Peters AA, Welvaart K, Bode PJ, Fleuren GJ (1992) Aggressive endometriosis in bone. Lancet 339:1477–1478\nKoger KE, Shatney CH, Hodge K, McClenathan JH (1993) Surgical scar endometrioma. Surg Gynecol Obstet 177:243–246\nErbayraktar S, Acar B, Saygili U, Kargi A, Acar U (2002) Management of intramedullary endometriosis of the conus medullaris. A case report. J Reprod Med 47:955–958\nYekeler E, Kumbasar B, Tunaci A, Barman A, Bengisu E, Yavuz E, Tunaci M (2004) Cyclic sciatica caused by infiltrative endometriosis: MRI findings. Skeletal Radiol 33:165–168. doi:10.1007/s00256-003-0663-8\nSpirt AA, Morrey BF, Pritchard DJ, Stanhope CR (2005) Fixed hip contracture and cyclic hip pain secondary to endometriosis. A case report. J Bone Joint Surg Am 87:177–180. doi:10.2106/JBJS.C.01529\nBasu PA, Kesani AK, Stacy GS, Peabody TD (2006) Endometriosis of the vastus lateralis muscle. Skeletal Radiol 35:595–598. doi:10.1007/s00256-005-0052-6\nKinkel K, Frei KA, Balleyguier C, Chapron C (2006) Diagnosis of endometriosis with imaging: a review. Eur Radiol 16:285–298. doi:10.1007/s00330-005-2882-y\nPossover M, Chiantera V (2007) Isolated infiltrative endometriosis of the sciatic nerve: a report of three patients. Fertil Steril 87:417, e417-419. doi:10.1016/j.fertnstert.2006.05.084\nReddy S, Porter D, Patton JT, Al-Nafussi A, Beggs I (2007) Endometriosis of the superior gluteal nerve. Skeletal Radiol 36:879–883. doi:10.1007/s00256-007-0316-4\nPoli-Neto OB, Rosa ESJC, Barbosa HF, Candido-Dos-Reis FJ, Nogueira AA (2009) Endometriosis of the soleus and gastrocnemius muscles. Fertil Steril 91:1294, e1213–1295. doi: 10.1016/j.fertnstert.2008.12.014\nSaberi S, Farhoud AR, Radmehr A (2009) Calf endometriosis: a case report and review of musculoskeletal involvement. Am J Orthop 38:E175–E178\nNishizawa S, Inubushi M, Okada H (2005) Physiological 18F-FDG uptake in the ovaries and uterus of healthy female volunteers. Eur J Nucl Med Mol Imaging 32:549–556. doi:10.1007/s00259-004-1703-x\nBotha AJ, Halliday AE, Flanagan JP (1991) Endometriosis in gluteus muscle with surgical implantation. A case report. Acta Orthop Scand 62:497–499\nConflict of interest\nNo funds were received in support of this study.\nAuthor information\nAuthors and Affiliations\nCorresponding author\nRights and permissions\nAbout this article\nCite this article\nNagamoto, Y., Hashimoto, N., Kakunaga, S. et al. Endometriosis in the deltoid muscle: a case report. Eur J Orthop Surg Traumatol 22, 497–500 (2012). https://doi.org/10.1007/s00590-011-0851-5\nReceived:\nAccepted:\nPublished:\nIssue date:\nDOI: https://doi.org/10.1007/s00590-011-0851-5","source_license":"CC0","license_restricted":false}