Role of laparoscopic peritoneal biopsy in the diagnosis of peritoneal tuberculosis. A seven-year experience.

The diagnosis of asymptomatic abdominal tuberculosis,without characteristic laboratory and radiologic findings, is difficult. We therefore investigated the role of diagnostic laparoscopy in patients with suspected peritoneal tuberculosis(PTB). Patients admitted to Hamad General Hospital, Qatar,who underwent laparoscopic peritoneal biopsy for suspected PTB from January 2004 to December 2010 were retrospectively analysed. Factors assessed included patient age, sex, symptoms,clinical signs, CT scan findings, laparoscopic findings andhistopathological diagnosis. A total of 41 patients, 33 males(80.5%) and 8 females (19.5%), of mean age 31 years, underwent laparoscopic peritoneal biopsy for suspected PTB duringthe study period. Abdominal pain was the most common presenting symptom, observed in 33 (80.5%) patients.Computerized tomography (CT) of the abdomen showed as citesin 37 patients (90%), bowel nodules in 22 (54%), peritoneal thickening and nodules in 37 (90%) and enlarged mesenteric lymph nodes in 11 (27%). The classical gross laparoscopic appearance of peritoneal tuberculosis was observed in 38 patients (93%), whereas laparoscopic findings were normal in 3 patients (7%). Histopathological results confirmed granulomatous inflammation in 38 patients (93%). The sensitivity and specificity of gross laparoscopic appearance in diagnosing peritoneal TB were both 100%. Two patients experienced complications from laparoscopy (5%), but there were nolaparoscopy-related deaths. Laparoscopic peritoneal biopsy isa rapid and safe method of accurately diagnosing PTB.

Clinical and epidemiological characteristics of lung cancer cases in Qatar.

This study documents for the first time the clinical and epidemiological characteristics of lung cancer cases in Qatar from 1998 to 2005. The age-standardized incidence rate was higher than that in many other Gulf countries: 8.95 per 100,000 (15.2 per 100,000 for males; 3.95 per 100,000 for females). Mean age at diagnosis was 57.5 years. Most patients were current smokers or ex-smokers at the time of diagnosis (82.5%). Unlike other Gulf countries, adenocarcinoma was the predominant type in both Qatari nationals and expatriates (43.9% of lung cancer types). Many cases were in an advanced stage at diagnosis (64.2% at stage IV). Incomplete information was available on mortality rate due to the migration of expatriates.

Clinical and epidemiological characteristics of lung cancer cases in Qatar

This study documents for the first time the clinical and epidemiological characteristics of lung cancer cases in Qatar from 1998 to 2005. The age-standardized incidence rate was higher than that in many other Gulf countries: 8.95 per 100 000 [15.2 per 100 000 for males; 3.95 per 100 000 for females]. Mean age at diagnosis was 57.5 years. Most patients were current smokers or ex-smokers at the time of diagnosis [82.5%]. Unlike other Gulf countries, adenocarcinoma was the predominant type in both Qatari nationals and expatriates [43.9% of lung cancer types]. Many cases were in an advanced stage at diagnosis [64.2% at stage IV]. Incomplete information was available on mortality rate due to the migration of expatriates

A young man with multiple pulmonary cysts.

Several diseases cause cystic or cyst-like parenchymal lung abnormalities including adult pulmonary Langerhan's cell histiocytosis (PLCH), lymphangioleiomyomatosis (LAM), emphysema, end-stage interstitial lung disease, and cystic bronchiectasis. Many of these diseases can now be diagnosed with high accuracy by the use of high-resolution computerized tomography (HRCT). In fact, HRCT of chest has proved a major breakthrough in the diagnosis of these diseases. We are presenting a young man with a cystic lung disease in which, the HRCT findings were virtually diagnostic of that disease. The clinical and HRCT findings of this disease along with its differential diagnosis are discussed in this paper.

Dietary coenzyme Q10 and vitamin E alter the status of these compounds in rat tissues and mitochondria.

Vitamin E (VE) and coenzyme Q (CQ) are essential for maintaining functions and integrity of mitochondria, and high concentrations of these compounds are found in their inner membranes. This study was conducted to examine the interaction between exogenously administered CQ10 and VE in rats. Male Sprague-Dawley rats (12 mo old) were fed a basal diet (10 IU VE or 6.7 mg RRR-alpha-tocopherol equivalent) supplemented with either 0 or 500 mg CQ10, and 0, 100 or 1310 IU VE/kg diet for 14 or 28 d. Liver, spleen, heart, kidney, skeletal muscle, brain and serum were analyzed for the levels of CQ10, CQ9 and VE. CQ10 supplementation significantly (P: < 0.05) increased CQ10 concentration in the liver and spleen (total and mitochondria) and serum, but not in other organs. Interestingly, rats supplemented with CQ10 plus 100 IU VE/kg diet had significantly higher CQ10 levels in the liver and spleen, whereas those supplemented with CQ10 plus 1310 IU VE/kg diet had lower levels, compared with those supplemented with CQ10 alone. As expected, dietary VE increased VE content in all of the organs analyzed in a dose-dependent manner. However, rats fed the basal diet supplemented with CQ10 had significantly higher VE levels in liver (total and mitochondria) than those not receiving CQ10 supplementation. CQ9 levels were higher in the liver and spleen, lower in skeletal muscle and unaltered in brain, serum, heart and kidney of rats supplemented with CQ10 compared with the controls. These data provide direct evidence for an interactive effect between exogenously administered VE and CQ10 in terms of tissue uptake and retention, and for a sparing effect of CQ10 on VE. Data also suggest that dietary VE plays a key role in determining tissue retention of exogenous CQ10.

Influence of dietary protein and lipid on weight loss in obese ovariohysterectomized cats.

OBJECTIVE: To determine effects of dietary lipid and protein on development of hepatic lipidosis (HL) and on physical and biochemical indices following rapid weight loss in cats. ANIMALS: 24 ovariohysterectomized cats. PROCEDURE: Cats were fed a high energy diet until they gained 30% of their ideal body weight and then randomly assigned to receive 1 of 4 weight-reduction diets (6 cats/diet) at 25% of maintenance energy requirements per day. Diets contained a low or high quality protein source and a lipid source deficient or sufficient in long chain essential fatty acids (LCEFA). Serum and plasma samples and liver biopsy specimens were obtained for biochemical analyses and determination of hepatic lipid content before and after weight gain and during and after weight loss. RESULTS: Irrespective of weight-reduction diet fed, all cats lost weight at a comparable rate (4.51 to 5.00 g/d/kg of obese body weight). Three cats developed hepatic lipidosis. Significant changes in plasma insulin, cholesterol, triglyceride, and serum glucose concentrations were detected after weight gain and weight loss in all diet groups, but values for these variables did not differ among groups. CONCLUSIONS AND CLINICAL RELEVANCE: Cats can lose 25 to 30% of their obese body weight over 7 to 9 weeks without developing overt clinical signs of HL, provided that weight-reduction diets are highly palatable, contain a high quality protein, have a source of LCEFA, and are fortified with vitamins and microminerals. However, rapid weight loss may increase risk factors associated with development of diabetes mellitus.

Effect of dietary protein quality and fatty acid composition on plasma lipoprotein concentrations and hepatic triglyceride fatty acid synthesis in obese cats undergoing rapid weight loss.

OBJECTIVE: To determine effects of dietary lipid and protein on plasma lipoprotein and free fatty acid concentrations and hepatic fatty acid synthesis during weight gain and rapid weight loss in cats. ANIMALS: 24 ovariohysterectomized cats. PROCEDURE: Cats were fed a high energy diet until they gained 30% of their ideal body weight and then randomly assigned to receive 1 of 4 weight reduction diets (6 cats/diet) at 25% of maintenance energy requirements. Diets contained a low or high quality protein source and a lipid source deficient or sufficient in long chain essential fatty acids. Plasma samples and liver biopsy specimens were obtained before and after weight gain and during and after weight loss for determination of free fatty acid, triglyceride, and lipoprotein concentrations. Synthesis of these substances was measured by use of isotope enrichment. RESULTS: Plasma total cholesterol concentration and concentration of lipoprotein fractions increased after weight gain, compared with baseline values. Weight loss resulted in a significant decrease in concentrations of all lipoprotein fractions except high density lipoprotein. High density lipoprotein concentration was significantly greater in cats fed diets containing an oil blend, compared with cats fed diets containing corn oil. Fatty acid synthesis after weight loss was below the detection limit of the measurement technique. CONCLUSIONS AND CLINICAL RELEVANCE: In cats undergoing rapid weight loss there is neither increased triglyceride synthesis nor decreased transport of very low density lipoproteins from the liver, suggesting that their involvement in the development of hepatic lipidosis may be minimal.