Prevalence and predictors of cardiac and liver iron overload in patients with thalassemia: A multicenter study based on real-world data.

Prevalence of cardiac and liver iron overload in patients with thalassemia in real-world practice may vary among different regions especially in the era of widely-used iron chelation therapy. The aim of this study was to determine the prevalence of cardiac and liver iron overload in and the management patterns of patients with thalassemia in real-world practice in Thailand. We established a multicenter registry for patients with thalassemia who underwent magnetic resonance imaging (MRI) as part of their clinical evaluation. All enrolled patients underwent cardiac and liver MRI for assessment of iron overload. There were a total of 405 patients enrolled in this study. The mean age of patients was 18.8±12.5years and 46.7% were male. Two hundred ninety-six (73.1%) of patients received regular blood transfusion. Prevalence of cardiac iron overload (CIO) and liver iron overload (LIO) was 5.2% and 56.8%, respectively. Independent predictors for iron overload from laboratory information were serum ferritin and transaminase for both CIO and LIO. Serum ferritin can be used as a screening tool to rule-out CIO and to diagnose LIO. Iron chelation therapy was given in 74.6%; 15.3% as a combination therapy.

Comparison between the radiographic findings in pulmonary tuberculosis of children with or without HIV infection.

OBJECTIVE: Identify the difference between radiographic findings in children with pulmonary tuberculosis with and without HIV infection. MATERIAL AND METHOD: The authors retrospectively reviewed the chest radiography of 93 children (under 15 years of age) with pulmonary tuberculosis between January 2000 and June 2005. Fifty-two of the children had an HIV co-infection while the remaining 41 children did not. The chest radiographic findings were assessed for parenchymal changes, lymphadenopathy, and pleural effusion. RESULTS: The radiographic manifestations in the HIV-infected group included interstitial infiltration in 39 patients (75%), alveolar infiltration in five patients (9.6%), combined interstitial and alveolar infiltration in seven patients (13.4%), miliary infiltration in one patient (1.9%), and hilar/mediastinal lymphadenopathy in 17 patients (32.6%). One patient had extensive alveolar infiltration in conjunction with multiple cavitatary formations. The findings in the non-HIV-infected group were interstitial infiltration in 30 patients (73.1%), hilar/mediastinal lymphadenopathy in 13 patients (31.7%, 3 of whom had adenopathy without parenchymal infiltration), and pleural effusion in two patients (4.8%). Other less frequent abnormalities included bronchiectasis, peribronchial thickening in the HIV-infected group, and atelectasis and granuloma in the non-HIV-infected group. There was no statistically significant difference in the radiographic findings between the two groups, except the association of hilar/mediastinal lymphadenopathy and pulmonary infiltration. Regarding hilar/mediastinal lymphadenopathy with or without pulmonary infiltration between the two groups, all cases in the HIV-infected group with hilar/mediastinal lymphadenopathy were significantly more associated with pulmonary infiltration (17 patients) than the other group (8 patients) (p = 0.009). CONCLUSION: Hilar/mediastinal lymphadenopathy with pulmonary infiltration strongly suggests the presence of HIV infection in children with pulmonary tuberculosis.

Role of shear wave elastography ultrasound in patients with systemic sclerosis.

PURPOSE: A study of shear wave elastography (SWE) for evaluation of skin stiffness in systemic sclerosis (SSc) patients. The purpose of this study was to measure the skin stiffness and thickness in patients with scleroderma using shear wave elastography. METHODS: Prospective data collections of skin stiffness and thickness using SWE in SSc and control groups. RESULTS: Skin stiffness and thickness were done in 29 patients with SSc and a 29 control population using SWE on bilateral forearms. The SSc patients had thicker skin and higher stiffnesses than the control group. The mean of skin thickness and stiffness using SWE of SSc are 1.74 mm and 47.32 kPa while normal subjects were 1.5 mm and 19.5 kPa. Mean differences were 0.023 mm (95% CI 0.15-0.3, p < 0.001) and 27.82 kPa (95% CI 22.63-33.01, p < 0.001). The dorsal forearms tend to have a higher SWE than the volar forearms in SSc. No statistically significant differences between gender, age or dominancy of skin stiffness were found. SWE has a good correlation with clinical manual palpation of forearms (mRSS) with Spearman rho's of 0.550 (p = 0.002) and 0.508 (p = 0.005) of dominant and non-dominant forearms. CONCLUSION: The application of SWE can be used for evaluation of skin involvement in scleroderma patients with good correlations with the mRSS that was used in the current patients. Furthermore, SWE is a safe technique for either diagnosis or follow up.

Imaging of a glomus tumor of the liver in a child.

Glomus tumors occur preferentially in the subcutaneous tissue of the fingers and toes, but are extremely rare in visceral organs. Although, there have been several reports of glomus tumors in the liver in adult patients, there have yet been no publications reporting glomus tumors of the liver in children. Here, we report a case of an 11-year-old girl who was admitted with a 2-week history of progressive dyspnea on exertion and vomiting. Upon physical examination, she was found to have hypertension and a palpated smooth, firm mass at the epigastrium. Abdominal MRI revealed a well-defined exophytic hypervascular mass with intratumoral hemorrhage at segment 3/4b of the liver. Ultrasound-guided biopsy revealed it to be a glomus tumor. An ultrasound conducted at a 1-month follow-up after preoperative embolization revealed that the mass had decreased in size. A subsequent exploratory laparotomy with left hepatectomy was performed and the histologic results confirmed the diagnosis.

Nonalcoholic fatty liver disease and hepatic fibrosis among perinatally HIV-monoinfected Asian adolescents receiving antiretroviral therapy.

To assess and compare the prevalence of persistent hepatic abnormalities, including nonalcoholic fatty liver disease (NAFLD) and/or hepatic fibrosis, among perinatally HIV-monoinfected Asian adolescents with history of abnormal hepatic enzymes to those without, using noninvasive diagnostic tools. A multicenter cohort study was conducted in Thailand and Indonesia. Adolescents aged 10-25 years who were on antiretroviral treatment (ART), had virologic suppression (HIV RNA<400 copies/mL within the past 6 months), and had no history of chronic hepatitis B/C infection were enrolled. Participants were pre-classified into 2 subgroups (1:1 ratio) as participants with history of elevated versus normal aminotransferase enzymes. NAFLD was defined as hepatic steatosis (any severity) evaluated by liver ultrasonography. Significant hepatic fibrosis was defined as liver stiffness ≥7.4 kPa evaluated by transient elastography. Participants who met the criteria for protocol-defined NAFLD and/or hepatic fibrosis were re-assessed to evaluate disease progression (persistent versus transient hepatic abnormalities) at one year later. Of 120 participants, 62 (51.7%) were male, 7 (5.8%) had central obesity, and 19 (15.8%) had insulin resistance (homeostasis model assessment of insulin resistance [HOMA-IR] >3.16). At enrollment, the median age and duration of ART (IQR) were 17.0 (14.6-19.2) years and 10.5 (7.1-12.0) years, respectively. Persistent hepatic abnormalities were identified in 5/60 participants listed in the group having history of elevated aminotransferases, corresponding to the prevalence of 8.3% (95% CI: 2.8-18.4%), whereas none (0/60) were among the group having history of normal hepatic enzymes. All 5 participants had persistent aminotransferase elevation (≥2 episodes within the past 12 months). Baseline alanine aminotransferase (ALT) >30 U/L (adjusted odds ratio [aOR]: 29.1; 95% CI: 1.7-511.8), and HOMA-IR >3.16 (aOR: 17.9; 95% CI: 1.1-289.7) were independently associated with persistent hepatic abnormalities. Among perinatally HIV-monoinfected Asian adolescents with history of elevated aminotransferase enzymes, persistent hepatic abnormalities are not uncommon. Screening for liver complications by noninvasive diagnostic tools might be considered in at risk individuals, including those with persistent ALT elevation and insulin resistance.

Mapping abnormal subcortical neurodevelopment in a cohort of Thai children with HIV.

Alterations in subcortical brain structures have been reported in adults with HIV and, to a lesser extent, pediatric cohorts. The extent of longitudinal structural abnormalities in children with perinatal HIV infection (PaHIV) remains unclear. We modeled subcortical morphometry from whole brain structural magnetic resonance imaging (1.5 T) scans of 43 Thai children with PaHIV (baseline age = 11.09±2.36 years) and 50 HIV- children (11.26±2.80 years) using volumetric and surface-based shape analyses. The PaHIV sample were randomized to initiate combination antiretroviral treatment (cART) when CD4 counts were 15-24% (immediate: n = 22) or when CD4 < 15% (deferred: n = 21). Follow-up scans were acquired approximately 52 weeks after baseline. Volumetric and shape descriptors capturing local thickness and surface area dilation were defined for the bilateral accumbens, amygdala, putamen, pallidum, thalamus, caudate, and hippocampus. Regression models adjusting for clinical and demographic variables examined between and within group differences in morphometry associated with HIV. We assessed whether baseline CD4 count and cART status or timing associated with brain maturation within the PaHIV group. All models were adjusted for multiple comparisons using the false discovery rate. A pallidal subregion was significantly thinner in children with PaHIV. Regional thickness, surface area, and volume of the pallidum was associated with CD4 count in children with PaHIV. Longitudinal morphometry was not associated with HIV or cART status or timing, however, the trajectory of the left pallidum volume was positively associated with baseline CD4 count. Our findings corroborate reports in adult cohorts demonstrating a high predilection for HIV-mediated abnormalities in the basal ganglia, but suggest the effect of stable PaHIV infection on morphological aspects of brain development may be subtle.

Helical CT assessment on hilar cholangiocarcinoma: comparison value of arterial phase and portovenous phase correlation.

OBJECTIVE: To study the correlation between the findings of hilar cholangiocarcinoma in hepatic arterial phase and portal venous phase. Attention will focus on whether the arterial phase imaging shows more detail than portal phase imaging. MATERIAL AND METHOD: Descriptive study design with retrospective data collection in Srinagarind Hospital, Khon Kaen University. CT scans of the upper abdomen of 34 patients with pathologically proven hilar cholangiocarcinoma between 2002 and 2004 were reviewed for: (1) characteristic of the tumor; (2) adenopathy, (3) arterial involvement, (4) venous involvement, and (5) degree of biliary involvement on both the hepatic arterial and portal venous phases. RESULTS: The correlation was high for characteristics of the tumor, the tumor enhancement pattern, and detection of adenopathy, degree of biliary involvement, and arterial involvement, but low for portal venous involvement which the portal venous phase detected better than the hepatic arterial phase. CONCLUSION: In hilar type cholangiocarcinoma, the portal venous phase yielded the best findings. Furthermore, it showed all findings that were seen in the hepatic arterial phase. According to the present study, the authors suggest doing a pre-contrast study then a portal venous phase imaging for evaluation and diagnosis of hilar type cholangiocarcinoma. There is no necessity to perform hepatic arterial phase in hilar cholangiocarcinoma.

Teleconsultation ultrasonography: a new weapon to combat cholangiocarcinoma.

Although cholangiocarcinoma (CCA) is usually a rare cancer, in northeast Thailand it kills 20 000 or more people every year. The prognosis is very poor owing to late stage diagnosis, with palliative treatment often representing the only option. In this area of predominantly rural Thailand, CCA is associated with infection with the liver fluke, Opisthorchis viverrini, which is classified as a group 1 carcinogen. Up to 6 million Thais are infected with this fluke. The Cholangiocarcinoma Screening and Care Program (CASCAP) was initiated in 2014 with the aim of detecting early stage CCA, allowing curative surgery, by using ultrasound (US) screening of prospectively 500 000 at risk individuals. In order to assess the massive number of radiological images, a teleconsultation system was set-up. This allows US images to be sent to a dedicated server where they can be viewed by an expert radiologist who then provides a provisional diagnosis, recommending more advanced diagnostic techniques (CT and MRI) for suspected cases. To date, 250 000 people have been screened, and 2000 cases of CCA diagnosed. This innovative information transfer procedure will also be made available to Laos, Cambodia and Vietnam, where O. viverrini infection is also common.

Pulmonary tuberculosis in a child presenting with acute hemoptysis.

We report on a tuberculous child whose only presenting symptom was acute hemoptysis. His chest radiograph revealed a mass-like lesion occupying the posterior basal segment of the right lower lung field. Multidetector computerized tomography (MDCT) of the chest showed a hypodense mass supplied by the bronchial artery and drained by the pulmonary vein. Surgical specimens revealed caseating granulomatous inflammation, positive for acid-fast bacilli. The child was successfully treated with a short-course (6-month) regimen of antituberculous drugs.

Ultrasound screening for Opisthorchis viverrini-associated cholangiocarcinomas: experience in an endemic area.

In Thailand, liver cancer is the most common malignancy in males and the third most common among females. In the Northeast region, cholangiocarcinoma (CHCA) is the prevalent type, with Opisthorchis viverrini (OV), an endemic liver fluke, being considered the cause. We evaluated the role of ultrasound (U/S) for cholangiocarcinoma screening as part of a larger cohort to characterize the linkage between liver fluke infestation and CHCA in Khon Kaen (Northeast Thailand). Most people (77%) had normal U/S findings while only 0.5% had suspected CHCA; thus, U/S should be used primarily for those with the highest risk, presenting symptoms and/or being OV positive.

Missed appointments at a tuberculosis clinic increased the risk of clinical treatment failure.

We investigated the charts of 381 new smear-positive tuberculosis patients at Khon Kaen Medical School during 1997-2001 using World Health Organization definitions to evaluate associations among treatment success or failure (defaulted, failed, died, or not evaluated) and tuberculosis clinic contact, demographics and clinical characteristics of the patients. Multinomial logistic regression was used for three-category outcome analysis: treatment success, transferred-out and clinical treatment failure. The treatment success and clinical treatment failure rates were 34.1% and 34.4%, respectively. About 46.5% and 85.8% of patients missed appointments at the tuberculosis clinic in the treatment success and treatment failure groups, respectively. The results show that patients who were absent from the tuberculosis clinic were 5.95 times more likely to have clinical treatment failure than treatment success, having adjusted for the effect of transfering-out and the effect of the treatment regimen and the sputum conversion status (adjusted odds ratio = 5.95; 95% CI: 2.99 to 11.84). The review showed that absence from the tuberculosis clinic was an independent risk factor for clinical treatment failure. We recommended that all new smear-positive tuberculosis patients should be followed closely at a tuberculosis clinic.

Predictive CT features in ruptured abdominal aortic aneurysm.

OBJECTIVE: To evaluate the CT findings including size of aneurysm, hyperattenuation crescent sign and focal discontinuity of mural calcification to predict the risk of ruptured aneurysm. MATERIAL AND METHOD: Records of 27 patients, who underwent Multislices Computed Tomography (MDCT) and required operative repair of abdominal aortic aneurysm from July 2000 to July 2003 were retrospectively reviewed Two radiologists evaluated the images by consensus, analyzing the aneurysm size, hyperattenuation crescent sign, and focal discontinuity of mural calcification. RESULTS: The authors found that the mean maximum AP diameters of the aneurysm in the ruptured and nonruptured group were 6.95 cm and 5.50 cm, respectively. All patients in the ruptured group had an aneurysm size of more than 5.0 cm. The hyperattenuation crescent sign and focal discontinuity of mural calcification had a high specificity for predicting ruptured aneurysm, 95% and 100%, respectively. There was statistical significant difference between the ruptured aneurysm and non-ruptured groups in the patients who had maximum aneurysm size more than 5 cm with positive hyperattenuation crescent sign (p < 0.041). CONCLUSION: A maximum size of aneurysm greater than 5 cm with positive hyperattenuation crescent sign is a suggestive sign to predict ruptured aneurysm.

Cystic fibrosis in three northeast Thai infants is CF really a rare disease in the Thai population?

The authors report on three infants with cystic fibrosis (CF), with different genotypes, presenting with different clinical manifestations, but having similar abnormal serum electrolytes (i.e. hyponatremia, severe hypochloremia and metabolic alkalosis). Despite the diagnostic investigations, the child who presents with severe electrolyte imbalance especially persistent hypochloremia and a family history of early infant death with respiratory or gastrointestinal problems should point to a diagnosis of CF Early identification and treatment remain critical to effective management. The diagnostic tool used, especially the sweat test, is needed for diagnostic investigations in Thailand.

Reversible posterior leukoencephalopathy caused by azathioprine in systemic lupus erythematosus.

The authors report a case of systemic lupus erythematosus with posterior leukoencephalopathy who presented with headache, tonic-clonic seizure, loss of consciousness and bilateral loss of vision, after taking azathioprine for three weeks. The patient had hypertension with normal eye grounds. The brain CT showed a hypodensity lesion at both bilateral occipital lobes, mainly in the white matter The symptoms and follow-up MRI were improved after the control of hypertension and discontinuation of azathioprine.

Singh index screening for femoral neck osteoporosis.

The present study included 130 elderly women living in Khon Kaen, Thailand, and all but one underwent both DEXA-BMD and AP radiographs of the left hip joint. The mean (SD) of age, weight, height and BMI of the 129 participants was 72.5 (5.3) years, 49.8 (10.3) kg, 1.49 (0.06) m, and 22.21 (4.13) kg/m2, respectively. The authors found both poor sensitivity and a positive predictive value for a Singh grade of < or = 4 or < or = 3 (viz. 58 and 29 or 19 and 43 percent, respectively). The ROC curve showed the poor diagnostic value of the Singh index since the area under the curve was approximately 40% the Singh index is therefore a poor screening tool for femoral neck osteoporosis.

Randomized trial of atorvastatin in improving endothelial function in diabetics without prior coronary disease and having average cholesterol level.

OBJECTIVE: The aim of this study was to determine whether HMGCoA reductase inhibitor with atorvastatin can modulate endothelial function in type II diabetics having average cholesterol and no prior cardiovascular disease. MATERIAL AND METHOD: Type II diabetics, with no prior cardiovascular events and total cholesterol at admission of < or = 200 mg/dl or LDL < or = 140 mg/dl, were randomized to placebo (n = 20) or atorvastatin 20 mg daily (n = 22) for 30 weeks. Brachial artery endothelium-dependent dilatation or flow-mediated dilatation (FMD) and endothelium-independent dilatation or nitroglycerine-mediated dilatation (NTGMD) were measured at baseline and after thirty weeks of treatment. RESULTS: Baseline clinical characteristics were similar at admission in both groups. After thirty weeks of treatment, the FMD did not significantly change in either the atorvastatin or placebo group (4.11 +/- 1.05% to 3.01 +/- 1.27% vs 5.75 +/- 1.93% to 6.45 +/- 1.41%, respectively; p = 0.46 by analysis of covariance). Similarly, the NTGM did not change in either group. CONCLUSION: The addition of HMGCoA reductase inhibitor with atorvastatin did not improve endothelial function in type 2 diabetes having average cholesterol with no prior cardiovascular disease, despite an improvement of the lipid profile.

Comparison of high-resolution computed tomography with pulmonary function testing in symptomatic smokers.

PURPOSE: To compare high-resolution computed tomography (HRCT) of lungs with pulmonary function in smokers diagnosed with emphysema. MATERIAL AND METHOD: The authors retrospectively reviewed 17 patients with a history of smoking and dyspnea, who underwent HRCT of the lungs and pulmonary function testing. HRCT scores were determined and compared to pulmonary function (FEV1, FEV1/FVC, and DLCO). RESULTS: The HRCT of all 17 patients (17/17; 100%) were typical of centrilobular emphysema; with a mean score of 12.88+/-9.18 (range, 4 to 34). Decreased FEV1 (<80% predicted) was found in 8 patients (47%), decreased FEV1/FVC (<70% predicted) in 13 patients (76%) and decreased DLCO (<80% predicted) in 3 patients (18%). The severity of emphysema revealed by HRCT was inversely correlated with the pulmonary function test: DLCO (r=-0.842, p=0.000) and FEV1 (r=-0.597, p= 0.011), but not FEV1/FVC (r=-0.400, p=0.112). CONCLUSION: HRCT allows detection of emphysema in symptomatic smokers even when pulmonary function appears to be normal. The greater the involvement of emphysema revealed by the HRCT, the poorer the pulmonary function. The authors, therefore, conclude that HRCT is the most sensitive modality for diagnosing early emphysema in smokers with dyspnea.

Pleuropulmonary blastoma in a child presenting with spontaneous pneumothorax.

The authors described a 27-month-old boy with the diagnosis of pleuropulmonary blastoma who presented with spontaneous pneumothorax. The child was admitted to our hospital with the chief complaint of respiratory distress for 8 months. Initial chest X-ray revealed tension pneumothorax on the right side. After chest tube insertion to the right side, a repeated chest X-ray showed minimal pleural effusion and a mass-like lesion at the right lower lung field. Computed tomography (CT) of the chest showed a cavity with intramural mass confined in the right lower lung accompanied with hydropneumothorax. The surgery revealed a cystic and solid mass occupying the right pleural space medially displacing the right lower lung. Total removal of the mass was performed, the histopathologic findings revealed a mixed cystic and solid type of pleuropulmonary blastoma which was composed of primitive blastema with multidirectional differentiation. Combination chemotherapy consisting of vincristine, cyclophosphamide, doxorubicin and dactinomycin was administered two weeks after surgery. The child has been well for almost 6 months since the surgery, without any signs of metastasis or recurrence.

Aortoesophageal fistula: a life-threatening cause of upper gastrointestinal hemorrhage in double aortic arch, a case report.

The authors present the case of a 2-month-old infant with double aortic arch that developed massive bright red upper gastrointestinal hemorrhage from aortoesophageal fistula (AEF) after prolonged endotracheal and nasogastric intubation. Emergency thoracotomy with AEF and double aortic arch repaired were done successfully under cardiopulmonary bypass. Due to tracheomalacia and left phrenic nerve injury, tracheal extubation could not be done until 1 month after correction of the vascular ring. The endotracheal and nasogastric tube led to fistula formation by compression of the esophageal wall against an abnormal double aortic arch. When a double aortic arch is suspected, prolonged nasogastric intubation should be avoided.

Development and validation of a breast cancer risk prediction model for Thai women: a cross-sectional study.

BACKGROUND: Breast cancer risk prediction models are widely used in clinical practice. They should be useful in identifying high risk women for screening in limited-resource countries. However, previous models showed poor performance in derived and validated settings. Therefore, we aimed to develop and validate a breast cancer risk prediction model for Thai women. MATERIALS AND METHODS: This cross-sectional study consisted of derived and validation phases. Data collected at Ramathibodi and other two hospitals were used for deriving and externally validating models, respectively. Multiple logistic regression was applied to construct the model. Calibration and discrimination performances were assessed using the observed/expected ratio and concordance statistic (C-statistic), respectively. A bootstrap with 200 repetitions was applied for internal validation. RESULTS: Age, menopausal status, body mass index, and use of oral contraceptives were significantly associated with breast cancer and were included in the model. Observed/expected ratio and C-statistic were 1.00 (95% CI: 0.82, 1.21) and 0.651 (95% CI: 0.595, 0.707), respectively. Internal validation showed good performance with a bias of 0.010 (95% CI: 0.002, 0.018) and C-statistic of 0.646(95% CI: 0.642, 0.650). The observed/expected ratio and C-statistic from external validation were 0.97 (95% CI: 0.68, 1.35) and 0.609 (95% CI: 0.511, 0.706), respectively. Risk scores were created and was stratified as low (0-0.86), low-intermediate (0.87-1.14), intermediate-high (1.15-1.52), and high-risk (1.53-3.40) groups. CONCLUSIONS: A Thai breast cancer risk prediction model was created with good calibration and fair discrimination performance. Risk stratification should aid to prioritize high risk women to receive an organized breast cancer screening program in Thailand and other limited-resource countries.