Case 2
A female in her 80s presented to our surgical department to undergo follow-up examinations for ascending colon cancer, which had been resected one year ago. She had a mild discomfort in the left upper quadrant. She did not have a fever. She had undergone laparoscopic right hemicolectomy for advanced ascending colon cancer (pT4a N1 M0, Stage IIIa, according to the Japanese Classification of Colorectal, Appendiceal, and Anal Carcinoma, Nineth English Edition) one year ago. She had not received adjuvant chemotherapy according to her wishes. Otherwise, her medical history was unremarkable and did not include hypertension or hyperlipidemia. On physical examination, her spleen was not palpable, and she did not have lymphadenopathy.