[A right sided colon volvulus with necrosis in a young patient. A case reported]. / Vólvulo de colon derecho con necrosis en paciente joven.

BACKGROUND: Colon volvulus (CV) is the twisting or rotation of an intestinal segment over the mesenterium, which causes occlusion and vascular compromise. It is a frequent disease in individuals over 65 years-old. We report a young patient with right CV and necrosis. CLINICAL CASE: A 17 year-old male with clinical findings of acute abdomen presented in the emergency room. During the surgical procedure, a right sided was found, CV with ileocecal valve and caecum ischemia and right colon necrosis with mesenteric vessels thrombosis. The case presented begun with sudden abdominal pain, with intestinal occlusion data, and widespread peritoneal rebound tenderles which suggested an intestinal occlusion. A simple abdomen Rx showed prominent right side colon distention with air levels in small bowel and a "coffee bean" image, suggestive of CVA hemicolectomy with termino-lateral ileocolic anastomosis was performed. CONCLUSIONS: Right-sided CV is considered as congenital in origin. They corresponded to 21% of cases in Mexico, with an average age of presentation at 62 years. The CV represents 10% of the causes of large bowel obstruction in Mexico. This is the first case in young people reported in Mexican literature.

[A cystic mesenteric lymphangioma presented at the colon sigmoid. Case report]. / Linfangioma quístico de mesenterio en colon sigmoides. Informe de un caso.

BACKGROUND: Cystic lymphangioma of the mesentery is an uncommon tumor; its incidence is 1:160,000. Our objective was to present the case of a patient with cystic lymphangioma of mesentery located at the colon. CLINICAL CASE: Female 25 years, attending consultation with a clinical picture suggestive of right ovarian cyst and increased abdominal perimeter. On physical examination abdominal painful tumor was identified, with deep palpation and mobilization. Abdominal ultrasound findings suggested giant right ovarian cyst. Laparotomy showed a cystic mass (18 x 11 cm size) depending mesenterium and involving sigmoid colon, surgical intervention was done after two days for bowel preparation. Resection of the cyst, and colon section involving sigmoid colon with termino-terminal anastomosis, was performed. The pathological report was: cystic lymphangioma of sigmoid mesentery. There was no recurrence at six month follow up. CONCLUSIONS: Cystic lymphangioma of the mesentery is a benign abdominal tumor, which occurs frequently in children but in adults is rare. We found 49 cases of mesenteric cysts reported in Mexico, of which 21 were lymphangiomas with a range of 1 to 73 years of age.

[Urethral duplication with giant calculus. Case report]. / Duplicación uretral con cálculo gigante. Informe de caso.

BACKGROUND: the urethral duplication is an uncommon congenital anomaly. We presented a case of male patient with congenital urethral duplication with a giant calculus in the accessory urethra. CASE: male patient 23 years old with sensation of tumor and pain in the lower pelvis and base of the penis with decrease of the urinary spurt and final dripping. There was edema in the penescrotal area; a hard tumor can be touched, painful to movement. The urethrography and cistoscopy showed urethral duplication type IIB according to the classification of Effman without communication with bladder, it had rooted before the fossa navicular in a blind-ending which was hidden at the bulbar urethral where the giant calculus was located. A surgical procedure was done to remove it. It measured 3 x 2 cm. The patient had a satisfactory recuperation. CONCLUSION: the presence of a giant calculus in the urethral is a strange situation and when it does happen, one must suspect malformation in such structure. There was no surgical correction done to the urethral duplication. The etiological factor for the formation of the giant calculus seems to be the urinary stasis, it is usually present in the urethral duplication. The surgical treatment must be individualized for each patient according to type of anatomical duplication.