A rare case of signet ring cell carcinoma of the transverse colon with concentric intramural metastases

Signet ring cell carcinoma is rarely accompanied by intramural metastases.The patient was a 76-year-old woman.A colonoscopy revealed early malignancy on the right side of the transverse colon.A depressed lesion was observed near the tumor.After laparoscopic right hemicolectomy, histopathological examination revealed a signet ring cell carcinoma with two intramural metastases arranged concentrically.The only complication was minor anastomotic leakage, on postoperative day 8.The patient was discharged and prescribed conservative therapy.In the 15 months since the laparoscopy, she has remained healthy, without recurrence.We treated a rare case of signet ring cell carcinoma of the transverse colon that was accompanied by concentric intramural metastases.