摘要
BACKGROUND Colonic diverticulosis is a common disease, and the coexistence of colonic diverticulosis and colorectal cancer is often seen clinically. It is very rare that colon cancer arises from the mucosa of a colonic diverticulum. When colon cancer arises in a diverticulum and then tends to develop outside the wall, without developing within the lumen, the differential diagnosis from complicating lesions due to colonic diverticulitis is difficult. CASE SUMMARY A 76-year-old man was admitted to a nearby clinic with a chief complaint of discomfort and urinary frequency. Since a vesicosigmoidal fistula was seen on abdominal computed tomography, he was referred to our hospital. Laparoscopic sigmoidectomy was performed because the various diagnostic findings were diagnosed as a vesicosigmoidal fistula with diverticulitis of the sigmoid colon. However, on histopathological examination, it was diagnosed as a vesicosigmoidal fistula due to colon cancer arising in the diverticulum. Laparoscopic partial resection of the bladder was performed because local recurrence was observed in the bladder wall one and a half years after surgery. It is currently one year after reoperation, but there has been no recurrence or metastasis. CONCLUSION Colon cancer arising in a diverticulum of the colon should be considered when diverticulitis with complications is observed.
BACKGROUND Colonic diverticulosis is a common disease,and the coexistence of colonic diverticulosis and colorectal cancer is often seen clinically.It is very rare that colon cancer arises from the mucosa of a colonic diverticulum.When colon cancer arises in a diverticulum and then tends to develop outside the wall,without developing within the lumen,the differential diagnosis from complicating lesions due to colonic diverticulitis is difficult.CASE S UMMARY A 76-year-old man was admitted to a nearby clinic with a chief complaint of discomfort and urinary frequency.Since a vesicosigmoidal fistula was seen on abdominal computed tomography,he was referred to our hospital.Laparoscopic sigmoidectomy was performed because the various diagnostic findings were diagnosed as a vesicosigmoidal fistula with diverticulitis of the sigmoid colon.However,on histopathological examination,it was diagnosed as a vesicosigmoidal fistula due to colon cancer arising in the diverticulum.Laparoscopic partial resection of the bladder was performed because local recurrence was observed in the bladder wall one and a half years after surgery.It is currently one year after reoperation,but there has been no recurrence or metastasis.CONCLUSION Colon cancer arising in a diverticulum of the colon should be considered when diverticulitis with complications is observed.
