[Dystrophic osseus metaplasia on small bowell mesentery in a patient with multiple abdominal sugeries: a case report]. / Metaplasia ósea distrófica en el mesenterio de intestino delgado en un paciente con múltiples cirugías abdominales. Informe de un caso.

Heteropropic ossification was initially described by Riedel in 1883. This is a rare disease but well documented in gastrointestinal tract. Several mechanisms have been proposed to determine the etiology of this metaplasia. We present a 59 year old male that was treated in the National Institute of Medicine Sciences and Nutrition Salvador Zubirán in whom after various abdominal surgical procedures the presence of bowel osseous metaplasia was documented.

Colonic cavernous hemangiomas: a report of two cases treated by laparoscopic surgery.

Hemangiomas are rare vascular tumors. They most commonly appear in the small bowel, as well as the colon and the rectum. Here, we report two cases of male patients who were admitted to our hospital for low rectal painless bleeding, misdiagnosed of hemorrhoid bleeding. Colonoscopy reported vascular tumors in both cases, which we surgically removed.

Incidence of clinically evident deep venous thrombosis after laparoscopic Roux-en-Y gastric bypass.

BACKGROUND: Advanced age, major orthopedic surgery, neoplastic disease, prolonged operations, varicose veins, immobilization, estrogen-containing medications, and obesity are known risk factors for the development of postoperative thromboembolic complications. Perioperative heparin is useful for reducing the incidence of deep venous thrombosis (DVT), but it is associated with a discrete bleeding rate. The purpose of this study was to determine the incidence of clinically evident DVT in morbidly obese patients after laparoscopic Roux-en-Y gastric bypass when a pneumatic compression hose is used as the only prophylaxis against DVT instead of anticoagulants. METHODS: From April 2000 to April 2003, 380 patients underwent laparoscopic Roux-en-Y gastric bypass for morbid obesity by one surgeon (R.H.C.). Prospectively, each patient was clinically evaluated for the presence of DVT during the postoperative period. Calf-length pneumatic compression stockings were placed before the procedure began, and remained in place until the patient was ambulatory. Ambulation was encouraged on the evening of the operation. No pharmacologic anticoagulant was used as a prophylaxis against DVT. RESULTS: Of the 380 patients, 346 were women and 34 were men with a mean age of 39.3 +/- 9.4 years (range, 14-65 years). The mean weight of these patients was 299.5 +/- 53.6 lb (range, 188-483 lb), and their mean body mass index was 48.5 +/- 6.6 (range, 36-70). The mean operative time was 103. 3 +/- 24.3 min (range, 62-227 min), and mean American Society of Anesthesiology (ASA) score was 2.6. Nine patients had clinical evidence of severe, chronic venous disease preoperatively. One patient (0.26%) experienced a clinically evident DVT limited to the popliteal vein on duplex ultrasonography. The clot resolved completely, as evidenced by follow-up duplex ultrasonography after 2 weeks of subcutaneously injected fractionated heparin. No clinically evident pulmonary thromboembolism occurred in this study group. CONCLUSIONS: The incidence of clinically evident DVT after laparoscopic Roux-en-Y gastric bypass is low when the procedure is accomplished with a relatively short operative time, with the initiation of calf-length pneumatic compression hose before the induction of anesthesia, and with routine early ambulation. No form of heparin anticoagulation is mandatory when these conditions can be met.

[Melanoma of the bile ducts. Report of a case and review of the literature]. / Melanoma en la confluencia de los conductos hepáticos. Reporte de un caso y revisión de la literatura.

Primary malignant melanomas of the bile ducts are extremely rare, with only seven cases previously reported in the literature published in English. This report concerns a 67-year-old woman with a primary melanoma at the confluence of the hepatic ducts. She underwent resection and hepaticojejunostomy. Seventeen years later, she remains alive with no evidence of recurrence. A thorough review of the literature was done. Surgical resection can offer hope for long-term survival.

Effect of heat treatments on stability of altemariol, alternariol monomethyl ether and tenuazonic acid in sunflower flour.

A study was carried out to evaluate the effect of heat treatment on the stability of alternariol (AOH), alternariol monomethyl ether (AME) and tenuazonic acid (TeA) in sunflower flour and the effectiveness of this treatment by a biological assay in rats. The concentrations of AOH and AME remained constant during heating at 100°C for up to 90 minutes while TeA concentration decreased with time to 50% after 90 minutes. The most effective treatment in reducing AOH and AME levels was heating at 121°C for 60 minutes. Histopathological evaluation in the biological assay in rats fed withAlternaria toxins showed marked atrophy and fusion of villi in the intestines and liver cell damage; these lesions were less severe in rats fed heat-treated sunflower flour in line with the reduced toxin content. However, a lower weight gain and a noticeable renal damage in rats were produced when they fed decontaminated flour.