[A Case of Sinusoidal Obstruction Syndrome and Nodular Regenerative Hyperplasia after Using Oxaliplatin for Rectal Cancer].

We present a case of a 44-year-old woman with rectal cancer(cT2N3M0, cStage Ⅲb)treated with 4 capecitabine-oxaliplatin( CAPOX)therapy courses, followed by laparoscopic intersphincteric resection. The patient received 7 postoperative, adjuvant CAPOX therapy courses. After 16 months since the final CAPOX administration, computed tomography(CT) revealed multiple liver tumors, showing early enhancement, and a jejunal mesenteric mass suspected to be a gastrointestinal stromal tumor(GIST). To overcome the percutaneous needle biopsy limitation, laparoscopic partial hepatectomy and laparoscopic- assisted partial intestinal resection were performed. Two liver lesions were diagnosed as nodular regenerative hyperplasia( NRH)with sinusoidal obstruction syndrome(SOS), supported by the hyperplasia and sinusoidal dilatation pathological findings, consequential to using oxaliplatin. Considering the rarity of NRH, using oxaliplatin may be proven vital in the differential diagnosis.