Introduction Colovesical fistula is the pathological communication between the colon and urinary bladder. It is related with high morbimortality rate and it is and uncommon complication of diverticulosis in young adults. Case presentation We report a case of a 38-year-old Brazilian man with fecaluria and pneumaturia for eight months, whose colovesical fistula was undetectable in CT scan and with surgical management. Discussion Diverticulosis is the main inflammatory condition causing colovesical fistulas and the sigmoid colon is the most common part involved. It is more prevalent in patients over 60 years old and in western countries due to low fiber diet. Conclusion Colovesical fistula diagnosis is difficult, requiring high suspicious and proper investigation through good anamnesis, CT scan and also colonoscopy and cystoscopy when necessary.

Introduction Even though colorectal cancer is one of the most frequent in the world, its simultaneous presence with other neoplasms, such as renal, is still rare in incidence. This article aims to report and expose a literature review of the synchrony of colorectal cancer and renal carcinoma. Presentation of case A 57-year-old female patient complaining of diffuse abdominal pain that worsened with food and improved with evacuation, especially in the periumbilical region and right iliac fossa, from moderate to strong intensity, starting 1 year ago, worsening in the last 3 months. An abdominal CT scan was performed, showing a lesion in the right kidney and a narrowing of the ascending colon lumen. Due to the possibility of cure, we opted for right colectomy and right nephrectomy at the same surgery. Discussion Synchronous tumors are neoplasms in which the diagnostic interval is up to 6 months, and must be differentiated from metachronic neoplasms and even metastases between tumors. The incidence of synchronous colorectal and renal cancer is rare but appears to be divergent. Conclusion The presence of synchronous tumors can be evidenced in imaging tests, such as CT scan, but appropriate diagnostic tests for each neoplasm, such as colonoscopy, should not be ruled out. The treatment of choice must be surgery, when possible, with the options of conventional access, videolaparoscopic and robotic surgery.

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