Retroperitoneal schwannoma mimicking colorectal cancer metastases: a false positive result report.
DOI:
https://doi.org/10.31053/1853.0605.v81.n2.38014Keywords:
positron-emission tomography, neurilemmoma, colonic neoplasms, false positive reactionsAbstract
Introduction: schwannomas are benign and common soft tissue tumors. They are usually asymptomatic and are discovered for other reasons.
Materials: we present the case of an 82-year-old male patient with a recent diagnosis of moderately differentiated adenocarcinoma of the colon and a hypermetabolic periaortic nodule as an incidental finding.
Results: percutaneous biopsy of the periaortic nodule confirmed the diagnosis of schwannoma. At one year of follow-up, growth of the schwannoma has been demonstrated. There are no signs of progression of his oncological disease.
Conclusions: schwannomas are benign tumors, rarely found in the retroperitoneum and can be sources of false-positive positron emission tomography results.
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Rajiah P, Sinha R, Cuevas C, Dubinsky TJ, Bush WH Jr, Kolokythas O. Imaging of uncommon retroperitoneal masses. Radiographics. 2011 Jul-Aug;31(4):949-76. doi: 10.1148/rg.314095132.
Boré P, Descourt R, Ollivier L, Le Roux PY, Abgral R. False Positive 18F-FDG Positron Emission Tomography Findings in Schwannoma-A Caution for Reporting Physicians. Front Med (Lausanne). 2018 Oct 8;5:275. doi: 10.3389/fmed.2018.00275.
Safaie E, Matthews R, Bergamaschi R. PET scan findings can be false positive. Tech Coloproctol. 2015 Jun;19(6):329-30. doi: 10.1007/s10151-015-1308-3.
Ogose A, Kawashima H, Hatano H, Ariizumi T, Sasaki T, Yamagishi T, Oike N, Inagawa S, Endo N. The natural history of incidental retroperitoneal schwannomas. PLoS One. 2019 Apr 15;14(4):e0215336. doi: 10.1371/journal.pone.0215336.
Beaman FD, Kransdorf MJ, Menke DM. Schwannoma: radiologic-pathologic correlation. Radiographics. 2004 Sep-Oct;24(5):1477-81. doi: 10.1148/rg.245045001.
Chee DW, Peh WC, Shek TW. Pictorial essay: imaging of peripheral nerve sheath tumours. Can Assoc Radiol J. 2011 Aug;62(3):176-82. doi: 10.1016/j.carj.2010.04.009.
Blake MA, Singh A, Setty BN, Slattery J, Kalra M, Maher MM, Sahani DV, Fischman AJ, Mueller PR. Pearls and pitfalls in interpretation of abdominal and pelvic PET-CT. Radiographics. 2006 Sep-Oct;26(5):1335-53. doi: 10.1148/rg.265055208.
Beaulieu S, Rubin B, Djang D, Conrad E, Turcotte E, Eary JF. Positron emission tomography of schwannomas: emphasizing its potential in preoperative planning. AJR Am J Roentgenol. 2004 Apr;182(4):971-4. doi: 10.2214/ajr.182.4.1820971.
Watanabe T, Itabashi M, Shimada Y, Tanaka S, Ito Y, Ajioka Y, Hamaguchi T, Hyodo I, Igarashi M, Ishida H, Ishiguro M, Kanemitsu Y, Kokudo N, Muro K, Ochiai A, Oguchi M, Ohkura Y, Saito Y, Sakai Y, Ueno H, Yoshino T, Fujimori T, Koinuma N, Morita T, Nishimura G, Sakata Y, Takahashi K, Takiuchi H, Tsuruta O, Yamaguchi T, Yoshida M, Yamaguchi N, Kotake K, Sugihara K; Japanese Society for Cancer of the Colon and Rectum. Japanese Society for Cancer of the Colon and Rectum (JSCCR) guidelines 2010 for the treatment of colorectal cancer. Int J Clin Oncol. 2012 Feb;17(1):1-29. doi: 10.1007/s10147-011-0315-2.
Choi PW, Kim HC, Kim AY, Jung SH, Yu CS, Kim JC. Extensive lymphadenectomy in colorectal cancer with isolated para-aortic lymph node metastasis below the level of renal vessels. J Surg Oncol. 2010 Jan 1;101(1):66-71. doi: 10.1002/jso.21421.
Wong JS, Tan GH, Teo MC. Management of para-aortic lymph node metastasis in colorectal patients: A systemic review. Surg Oncol. 2016 Dec;25(4):411-418. doi: 10.1016/j.suronc.2016.09.008.
Sakamoto J, Ozawa H, Nakanishi H, Fujita S. Oncologic outcomes after resection of para-aortic lymph node metastasis in left-sided colon and rectal cancer. PLoS One. 2020 Nov 16;15(11):e0241815. doi: 10.1371/journal.pone.0241815.
Liu Z, Xu Y, Xu G, Baklaushev VP, Chekhonin VP, Peltzer K, Ma W, Wang X, Wang G, Zhang C. Nomogram for predicting overall survival in colorectal cancer with distant metastasis. BMC Gastroenterol. 2021 Mar 4;21(1):103. doi: 10.1186/s12876-021-01692-x.
Meek RD, Mills MK, Hanrahan CJ, Beckett BR, Leake RL, Allen H, Williams DD, Tommack M, Schmahmann S, Hansford BG. Pearls and Pitfalls for Soft-Tissue and Bone Biopsies: A Cross-Institutional Review. Radiographics. 2020 Jan-Feb;40(1):266-290. doi: 10.1148/rg.2020190089.
Graham DS, Russell TA, Eckardt MA, Motamedi K, Seeger LL, Singh AS, Bernthal NM, Kalbasi A, Dry SM, Nelson SD, Elashoff D, Levine BD, Eilber FC. Oncologic Accuracy of Image-guided Percutaneous Core-Needle Biopsy of Peripheral Nerve Sheath Tumors at a High-volume Sarcoma Center. Am J Clin Oncol. 2019 Oct;42(10):739-743. doi: 10.1097/COC.0000000000000591.
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