Displaying publications 41 - 60 of 1043 in total

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  1. Squamous cell carcinoma antigen as an adjunct tumour marker in primary carcinoma of the lung
    Cheah PL, Liam CK, Yap SF, Looi LM
    J Clin Pathol, 1994 Jun;47(6):535-7.
    PMID: 8063936
    AIMS: To determine (1) the detection rate of primary carcinoma of the lung by serological assay of CEA (carcinoembryonic antigen); and (2) whether addition of seroassay of squamous cell carcinoma related antigen before treatment improves detection sensitivity.

    METHODS: A prospective study spanning 27 months was conducted at the University Hospital, Kuala Lumpur. Serum CEA (Abbott IMx) and serum squamous cell carcinoma antigen (Abbott IMx) from patients clinically suspected of having primary carcinoma of the lung, were assayed using the microparticle enzyme immunoassay method.

    RESULTS: Thirty seven cases of histologically confirmed primary lung carcinoma were studied. Of these, 17 were squamous cell carcinomas, 10 adenocarcinomas, nine small cell carcinomas, and one large cell carcinoma. The patients' ages ranged from 34-82 years. The male:female ratio was 3.6:1. Squamous cell carcinoma antigen was raised above the cutoff value of 1.5 ng/ml in 94.1% of squamous cell carcinomas, 20.0% of adenocarcinomas, and 11.1% of small cell carcinomas. By comparison, CEA was raised above the cutoff value of 3.0 ng/ml in 70.6% of squamous cell carcinomas, 77.8% of small cell carcinomas, and 100% of adenocarcinomas. CEA and squamous cell carcinoma antigen were not raised in the patient with large cell carcinoma and in 14 healthy volunteers. None of 15 patients with a variety of benign lung diseases showed a rise of CEA, while two patients--a 25 year old Indian woman with pneumonia and a 64 year old Malay man with bronchial asthma--had raised squamous cell carcinoma antigen values above the cutoff. Serum CEA and squamous cell carcinoma antigen values did not seem to correlate with stage or degree of differentiation of the tumours.

    CONCLUSIONS: The findings suggest that CEA is a good general marker for carcinoma, particularly adenocarcinoma. In contrast, squamous cell carcinoma antigen is more specific for squamous carcinoma.

    Matched MeSH terms: Sensitivity and Specificity
  2. The influence of antibody levels in dengue diagnosis by polymerase chain reaction
    Chan SY, Kautner IM, Lam SK
    J Virol Methods, 1994 Oct;49(3):315-22.
    PMID: 7868649
    The potential of RT-PCR to rapidly diagnose dengue infections from both acute and convalescent phase patients' sera was evaluated. The RNA extraction method involved binding of the viral RNA to silica particles in the presence of high concentration of guanidine thiocyanate. The protocol that was established was sensitive enough to detect 40 plaque forming units per 100 microliter of serum and results could be obtained within one day. Results from this study indicate that clinical samples should be collected in the early acute phase of illness when anti-dengue antibodies were undetectable or of low titres to ensure a more reliable diagnosis.
    Matched MeSH terms: Sensitivity and Specificity
  3. Fulltext Body mass index and illness in rural Sarawak
    Strickland SS, Ulijaszek SJ
    Eur J Clin Nutr, 1994 Nov;48 Suppl 3:S98-108; discussion S108-9.
    PMID: 7843165
    This paper reports findings of a cross-sectional anthropometric survey of 447 men and 564 women aged > 18 years of the Iban tribe in rural Sarawak. The percentage of each approximately 10 year cohort with body mass index (BMI: kg/m2) < 18.5 increased progressively with age > 40 years in both sexes. BMI and arm-muscle plus bone cross-sectional area (AMBA) were influenced significantly by reported single symptoms in men and two concurrent symptoms in women. Sensitivity of BMI < 18.5 for identifying those reporting symptoms of illness was 21% in men and 29% in women. Independently of illness effects, values of stature, BMI and AMBA in men, and stature alone in women, were significantly greater in those farming plots with the shortest time left fallow, suggesting their comparative success. The BMI of men may reflect primarily their economic activities, while that of women their experience of illness; the AMBA may also be a better overall index of health than BMI in this population.
    Matched MeSH terms: Sensitivity and Specificity
  4. Fulltext The role of maternal serum alpha-fetoprotein, human chorionic gonadotrophin and oestriol in the antenatal screening of Down's syndrome
    Chang TC, Cheng HH
    Med J Malaysia, 1994 Dec;49(4):351-4.
    PMID: 7545778
    The use of maternal age alone to identify pregnant mothers at risk of a fetus with Down's syndrome has recently been supplemented by maternal serum screening using biochemical markers such as alpha-protein, human chorionic gonadotrophin and oestriol. These tests have been reported to increase the sensitivity of antenatal detection of such fetuses from 35% to 67% with a false positive rate of 5%. However, these maternal serum markers may be affected by maternal weight, the smoking history of mothers and diabetes mellitus. Furthermore, such sensitivities are achieved only when gestational age is assessed accurately by ultrasound. Many further studies need to be carried out before the introduction of maternal serum screening into routine obstetric practice in Singapore. These include studies on the incidence of Down's syndrome in the local population, studies on the distribution of these serum markers in the second trimester of pregnancy, sensitivities and positive predictive values of such a test in the local population as well as the socio-economic implications of implementing such a screening test in the local obstetric population.
    Matched MeSH terms: Sensitivity and Specificity
  5. Hybridisation analysis for serum hepatitis B virus DNA
    Yap SF, Wong PW, Kenneth-Raj
    Br J Biomed Sci, 1994 Dec;51(4):336-40.
    PMID: 7756940
    A study was carried out to determine optimal assay conditions for an in-house hybridisation assay for detection of hepatitis B virus (HBV) genome in serum samples. Pre-treatment of samples, blot treatment and hybridisation conditions were found to affect assay performance. The indirect serum blot procedure was more robust and reliable than direct serum blotting. In the former, viral particles were isolated from the sample, lysed and then extracted. In comparison, no approaches to the direct serum spot method performed adequately. Sensitivity studies showed that labelling of the nucleic acid probe with dCTP was more efficient than with dATP. Using probes labelled to a specific activity of > 1 x 10(8) and an autoradiography period of about 48 h we could achieve a detection limit of < 1 pg. Specificity was achieved by use of a highly purified probe and moderately stringent hybridisation and wash conditions. Background binding was minimal and there was no non-specific binding of probe to negative control samples. Factors affecting speed of the assay were studied to identify steps that could be modified to shorten assay time without sacrificing performance. A shorter centrifugation step and the use of a high specific-activity probe permitted completion of an assay within four days.
    Matched MeSH terms: Sensitivity and Specificity
  6. Computed tomography and ultrasonography: a comparative study in the diagnosis of analgesic nephropathy
    Segasothy M, Abdul Samad S, Zulfiqar A, Shaariah W, Morad Z, Prasad Menon S
    Nephron, 1994;66(1):62-6.
    PMID: 8107955
    Computed tomography (CT) and ultrasonography (US) were performed in 40 patients who had consumed excessive quantities of analgesics (> 1 kg) to compare their value in the diagnosis of analgesic nephropathy (AN). The computed tomography and sonographic features were renal papillary calcifications. Renal papillary necrosis (RPN) was documented in 20 of 40 patients by US and in 14 of 40 patients by CT. In 11 patients, both US and CT were positive. In 9 patients, US was positive whilst CT was negative. In 3 patients, CT was positive whilst US was negative. Prevalence of RPN was 50% using US and 35% using CT. Using US as a gold standard, sensitivity of CT was 55%, specificity 85%, positive predictive value 78.6% and negative predictive value 34.6%. Percent agreement with CT and US was 70%. Cohen's kappa statistic adjusting for chance agreement was 40%. Based on these results, it is found that US yielded a higher percentage of positive cases of RPN.
    Matched MeSH terms: Sensitivity and Specificity
  7. The role of transvaginal sonography in the diagnosis of placenta praevia
    Tan NH, Abu M, Woo JL, Tahir HM
    Aust N Z J Obstet Gynaecol, 1995 Feb;35(1):42-5.
    PMID: 7771998 DOI: 10.1111/j.1479-828x.1995.tb01828.x
    Transvaginal sonography was performed in 70 patients diagnosed to have placenta praevia by transabdominal sonography. The diagnosis was confirmed either by digital examination in theatre at term or operative finding at delivery. Forty-nine cases (70%) were correctly diagnosed to have placenta praevia by both modes of sonography. Transvaginal sonography ruled out placenta praevia in 12 cases (17%) thought to be placenta praevia by transabdominal ultrasound. Both transabdominal and transvaginal sonography demonstrated 'placental migration' in 4 cases (6%) which were no longer praevia at delivery. Five patients (7%) were erroneously believed to have placenta praevia by both sonographic techniques. Overall, the diagnostic accuracy of transvaginal sonography was 92.8% compared with 75.7% for transabdominal sonography. None of the subjects experienced any exacerbation of bleeding or other complications. The results suggest that transvaginal sonographic localization of the placenta is safe and superior to the transabdominal route.
    Matched MeSH terms: Sensitivity and Specificity
  8. Fulltext Usefulness of the "CAGE" in Malaysia
    Indran SK
    Singapore Med J, 1995 Apr;36(2):194-6.
    PMID: 7676267
    This study examines the usefulness of the "CAGE", (which is an acronym for "cut down", "annoyed", "guilty" and "eye-opener"), a 4-question screening test to identify excessive drinkers among Malaysian inpatients. The CAGE questionnaire after translation and back translation was administered to all inpatients in the General Hospital, Kuala Lumpur. The author interviewed 'blindly' all who score positive on the CAGE score and 10% of all negatives using the DSM III interview schedule for alcohol abuse dependence. The results show that the CAGE performs best at a cut-off point of 2 and above, with a sensitivity of 92%, specificity of 62%, positive predictive values of 38% and Kappa (K) of 0.37 with a DSM III R diagnosis for alcohol abuse/dependence. The poor agreement with a DSM III diagnosis indicates that the CAGE is not useful in the Malaysian population. Reasons suggested for this are: cultural factors in the Malaysian population resulting in the overrating of the question of 'guilt' by Muslims and translations into the local languages which are only the closest approximations.
    Matched MeSH terms: Sensitivity and Specificity
  9. Molecular analysis of Salmonella enteritidis by pulsed-field gel electrophoresis and ribotyping
    Thong KL, Ngeow YF, Altwegg M, Navaratnam P, Pang T
    J Clin Microbiol, 1995 May;33(5):1070-4.
    PMID: 7615707
    A total of 61 isolates of Salmonella enteritidis were analyzed by the techniques of pulsed-field gel electrophoresis (PFGE) and ribotyping. Twenty-three of the isolates were from Zurich, Switzerland, and 38 isolates were from the University Hospital, Kuala Lumpur, Malaysia. Five of the Malaysian isolates were hospital-related outbreak strains and were shown to be indistinguishable by PFGE analysis following digestion with three different restriction endonucleases, XbaI (5'-TCTAGA-3'), SpeI (5'-ACTAGT-3'), and AvrII (5'-CCTAGG-3'). The PFGE pattern of an isolate from a suspected carrier staff nurse was found to be identical to those of the hospital outbreak isolates. These isolates were also indistinguishable by ribotyping with SmaI and SphI. The same single PFGE pattern was also detected in 29 of 32 sporadic isolates of S. enteritidis. Four closely related ribotypes were detected among these 29 isolates. Similarly, outbreak-related strains from Switzerland showed close genetic identity by PFGE and ribotyping. Strains obtained from poultry showed more variations in their PFGE patterns and ribotypes, although the patterns were still closely related. In addition, SphI ribotypes A and D among the Swiss strains correlated with phage types 4 and 8, respectively. No correlation of phage types with PFGE pattern was noted. Both PFGE and ribotyping indicate that the S. enteritidis strains circulating in Malaysia and Switzerland are very similar and may be clonally related. Comparison of the PFGE patterns with the ribotypes for 23 Swiss and 16 Malaysian isolates showed that there was a 69% concordance in the grouping of isolates. We conclude that the close genetic similarity observed between epidemiologically unrelated and outbreak-related isolates of S. enteritidis suggests that both PFGE and ribotyping are of limited value in the epidemiological analysis of these particular isolates, possibly because of the highly clonal nature of pathogenic strains of S. enteritidis.
    Matched MeSH terms: Sensitivity and Specificity
  10. Fulltext Development and preliminary evaluation of an IgM dot-immunobinding assay (IgM-DIA) for rapid serodiagnosis of scrub typhus infection
    Koay AS, Tay ST, Cheong YM, Yasin RM
    Southeast Asian J. Trop. Med. Public Health, 1995 Jun;26(2):350-3.
    PMID: 8629074
    An IgM dot-immunobinding assay (IgM-DIA) was developed for the diagnosis of scrub typhus infection. The whole cell antigens of Karp, Kato and Gilliam strains of Rickettsia tsutsugamushi were immobilized onto nitrocellulose paper and reacted with patients sera. The presence of IgM R. tsutsugamushi specific antibody in the patient sera could be detected by the observation of a visible brown dot on the nitrocellulose paper. The IgM-DIA has a sensitivity of 90.4% and specificity of 81.4% as compared to the indirect immunoperoxidase test. The IgM-DIA is rapid, simple, cost-effective, does not require microscope or incubator. It is recommended as a rapid screening test for the diagnosis of scrub typhus infection in the field or rural area within the hyperendemic region.
    Matched MeSH terms: Sensitivity and Specificity
  11. A review of the serological results obtained in a routine diagnostic laboratory for Mycoplasma pneumoniae infections
    Tay ST, Cheong YM
    Malays J Pathol, 1995 Jun;17(1):35-7.
    PMID: 8907003
    The results of a Mycoplasma pneumoniae serology test performed routinely at the Bacteriology Division, Institute for Medical Research were reviewed. A total of 1402 patients were screened over a period of 4 years (January, 1990-December, 1993), of which 327 (23.3%) were seropositive. The seropositivity rates among Malays, Chinese and Indians were 25.2, 25.4 and 17.8% respectively. The male to female ratio was 1:1. The age specific rate was highest amongst patients of the 6-12 years (35.1%) followed by the 13-20 years age groups (35.0%). In general, infection with M. pneumoniae appears to be relatively common in this country.
    Matched MeSH terms: Sensitivity and Specificity
  12. Fulltext Oesophageal motility disorders: rapid functional diagnosis using computerised radionuclide oesophageal transit study
    Paramsothy M, Goh KL, Kannan P
    Singapore Med J, 1995 Jun;36(3):309-13.
    PMID: 8553100
    Ten patients presenting with central chest pain and/or dysphagia were diagnosed to have oesophageal motility disorders (OMD) with an incoordinate motor function using computerised radionuclide oesophageal transit study (RT). The criteria for diagnosis of OMD with incoordination using RT were: an 'incoordinate' or 'to and fro' pattern characterised by multiple peaks of activity, prolonged total transit time or radionuclide bolus through entire length of oesophagus and a significant portion of bolus entering the stomach. These features are characteristic but not pathognomonic of diffuse oesophageal spasm (DES) as they are also seen in non-specific motility disorders (NSMD) and occasionally in order oesophageal motility disorders. Mechanical obstruction in the oesophagus and coronary artery disease were excluded appropriately in these patients. When manometry is not available, RT is a sensitive, safe, simple, rapid and non-invasive alternative modality in confirming certain oesophageal motility disorders.
    Matched MeSH terms: Sensitivity and Specificity
  13. Fulltext Serodiagnosis of melioidosis in Malaysia
    Vadivelu J, Puthucheary SD, Gendeh GS, Parasakthi N
    Singapore Med J, 1995 Jun;36(3):299-302.
    PMID: 8553097
    Current diagnosis of melioidosis is based on bacterial culture and/or serology which is becoming increasingly useful. An IgM-ELISA using heat-killed whole cells of Pseudomonas pseudomallei was developed and compared with an indirect haemagglutination technique (IHAT) and an indirect immunofluorescent technique(IFAT). The IgM-ELISA using a P:N ratio of > or = 2 had a sensitivity of 91% and a specificity of 96%. All 3 assays were further used in a seroepidemiological survey amongst different groups of patients and healthy individuals. It was found that the IFAT performed better than the IHAT, detecting antibodies to P. pseudomallei in 6% of diabetics, 5% of pyrexics, 8% of pregnant women and 3% of farmers. For the same groups the IgM-ELISA detected antibodies in 1% of pyrexics, 8% of pregnant women and a further 14% of farmers. The IgM-ELISA was found to be sensitive and useful for the serological diagnosis of acute melioidosis.
    Matched MeSH terms: Sensitivity and Specificity
  14. Effectiveness of a dot-blot immunoassay of anti-Rickettsia tsutsugamushi antibodies for serologic analysis of scrub typhus
    Weddle JR, Chan TC, Thompson K, Paxton H, Kelly DJ, Dasch G, et al.
    Am J Trop Med Hyg, 1995 Jul;53(1):43-6.
    PMID: 7625532
    We compared a commercially available dot-blot immunoassay system with the indirect immunofluorescence assay (IFA) in tests of known negative and known positive sera from scrub typhus cases. Using a panel of 100 sera from patients with various rickettsial and nonrickettsial infections, we observed that the IFA was 99% specific and the dipstick assay was 98% specific. In tests of 91 sera (30 negative and 61 positive for scrub typhus antibodies) from a study of febrile patients in Malaysia, using the standard of an IFA titer < 1:64 as negative, an IFA titer > 1:128 as positive, and an IFA titer = 1:64 as either positive or negative (supported by clinical records), dipsticks were 83% specific and 90% sensitive. The quantitative correlation of the dipsticks to IFA titers was confirmed by significant differences in geometric means of inverse IFA titers corresponding to the number of positive dipstick spots (no dots = 8.5, one dot = 43.3, two dots = 206.7, and three dots = 676.9). The assay would enable physicians and public health workers who deal with patients to quickly diagnose and appropriately treat most cases of the disease, especially in areas of high prevalence where the proportion of false-positive results to true-positive results would be low.
    Matched MeSH terms: Sensitivity and Specificity
  15. Fulltext 14C-urea breath test: a useful non-invasive test in the diagnosis of Helicobacter pylori infection
    Goh KL, Parasakthi N, Peh SC, Ong KK
    Med J Malaysia, 1995 Sep;50(3):208-11.
    PMID: 8926896
    Sixty-three breath samples were collected from patients who underwent a 14C-urea breath test. Following ingestion of a radiolabelled 14C-labelled urea solution, breath samples containing 14C-labelled carbon dioxide were trapped in a solution containing hyamine hydroxide. Samples were then counted in a liquid scintillation counter. Breath samples were collected at 2, 15, 20, 25 and 30 minutes following ingestion of the urea solution. The presence or absence of Helicobacter pylori (HP) infection was determined on the basis of endoscopic biopsy tests which included culture, histological examination, rapid urease test and a gram stain of a fresh tissue smear. Thirty-two HP positive and 31 HP negative samples were collected. The mean counts at 15, 20, 12 and 30 minutes time points were: 4413, 4458, 4109 and 3795 dpm respectively for the positive samples and 1275, 877, 690 and 565 dpm respectively for the negative samples. Based on a cutoff value (mean of the negative samples + 3 standard deviations) for every time point, HP positive and negative samples could be clearly differentiated giving a sensitivity and specificity of 100%. The 14C-urea breath test is a reliable and convenient diagnostic test for H. pylori.
    Matched MeSH terms: Sensitivity and Specificity
  16. NMR characterization of guanine DNA site alkylated by kapurimycin A3, an antitumour antibiotic from Streptomyces sp
    Chan KL, Sugiyama H, Saito I, Hara M
    Phytochemistry, 1995 Nov;40(5):1373-4.
    PMID: 8534399
    The kapurimycin A3-guanine adduct was formed by alkylation of the antitumour antibiotic with d(CGCG)2. The site of alkylation of the guanine was confirmed by comparative NMR studies with N-7-methyl-guanine in DMSO-d6.
    Matched MeSH terms: Sensitivity and Specificity
  17. The use of polymerase chain reaction (PCR) as a diagnostic tool for dengue virus
    Thayan R, Vijayamalar B, Zainah S, Chew TK, Morita K, Sinniah M, et al.
    Southeast Asian J. Trop. Med. Public Health, 1995 Dec;26(4):669-72.
    PMID: 9139373
    This study describes the use of polymerase chain reaction as a diagnostic tool for detecting and typing of dengue virus. PCR was compared against virus isolation. First RT-PCR was done using dengue consensus primers after which positive samples were subjected to RT-PCR using type-specific primers. This study shows that the local strains of the dengue virus could be detected using the chosen primers. Furthermore, RT-PCR was found to be more sensitive than virus isolation in identifying the dengue positive samples.
    Matched MeSH terms: Sensitivity and Specificity
  18. Fulltext Retrospective review of dot enzyme immunoassay test for typhoid fever in an endemic area
    Jackson AA, Ismail A, Ibrahim TA, Kader ZS, Nawi NM
    Southeast Asian J. Trop. Med. Public Health, 1995 Dec;26(4):625-30.
    PMID: 9139364
    Typhoid fever remains a common problem in Malaysia, but for its diagnosis both blood culture and the Widal test have drawbacks. A dot enzyme immunoassay (EIA) has been developed which detects IgM and IgG antibodies to a specific 50 kDa outer membrane protein on Salmonella typhi. This study was performed among outpatients attending the university hospital in Kelantan, a state on the east coast of Peninsular Malaysia where typhoid is endemic. The dot EIA was done on 149 outpatients of all ages in whom typhoid was suspected. Of these, 60 were not analysable due to insufficient data. The other 89 were retrospectively classed as typhoid (total = 21), or not typhoid (total = 68). The criteria for diagnosis of typhoid was either, blood culture was positive, or with blood culture negative, temperature was at least 38 degrees C and Widal O and/or H titer greater than or equal to 1/160. We then compared the diagnosis with the EIA result. For the result where either IgM or IgG was positive, sensitivity was 90%, specificity 91% and negative predictive value 97%. For IgM positive, specificity was 100%. But the specificity of IgG positive alone was reduced by six false positives, which were probably due to persistence of IgG after acute infection. Other cases were found where IgG positive alone appeared in the first week of typhoid fever, probably due to rapid response in a second or subsequent infection. We also found that IgM-producing patients were significantly younger than those showing IgG alone positive.
    Study site: Community Medicine clinic, Accident & emergency department, Hospital Universiti Sains Malaysia (HUSM), Kelantan, Malaysia
    Matched MeSH terms: Sensitivity and Specificity
  19. Detection of circulating antigens of Parastrongylus cantonensis in human sera by sandwich ELISA with specific monoclonal antibody
    Eamsobhana P, Mak JW, Yong HS
    Southeast Asian J. Trop. Med. Public Health, 1995 Dec;26(4):712-5.
    PMID: 9139382
    A specific monoclonal antibody (AW-3C2) as revealed by ELISA was produced against the adult worm antigens of Parastrongylus cantonensis and used in a sandwich ELISA for the detection of circulating antigens in the sera of parastrongyliasis patients and those with other parasitic diseases. A total of 60 sera was used in this study. Of these, 10 each were from patients with parastrongyliasis, cysticercosis, filariasis, gnathostomiasis, malaria and toxocariasis. The control group consisted of 53 serum samples from normal healthy Thais and Malaysians. The mean +/- optical density (OD) values for the normal Thai and Malaysian groups were 0.126 +/- 0.028 and 0.124 +/- 0.029, respectively. The mean OD values of the parastrongyliasis patient group differed significantly from that of the normal groups as well as those of other parasitic infections. Using a cut-off point of OD +/- 3SD of the control groups as indicating a positive reading, the specificity of the assay with this monoclonal antibody was 100% while the sensitivity was 50%.
    Matched MeSH terms: Sensitivity and Specificity
  20. High performance liquid chromatography (HPLC) method for confirming thin layer chromatography (TLC) findings in inborn errors of metabolism children in Malaysia
    Yahya NA, Ismail Z, Embong KH, Mohamad SA
    Southeast Asian J. Trop. Med. Public Health, 1995;26 Suppl 1:130-3.
    PMID: 8629091
    High performance liquid chromatography (HPLC) with phenylisothiocyanate (PITC) is recently used for confirming the diagnosis of inborn errors of metabolism (IEM) especially amino acid disorders in Malaysian children. The method of HPLC used is a precolumn derivatization of amino acids with phenylisothiocyanate and is separated by reversed phase chromatography using 3.9 x 300 mm free amino acid columns and is detected by a UV/Vis detector. The samples are obtained from cases suspected of inborn errors of metabolism, especially of amino acid disorders, which are detected clinically by pediatricians. Initially, samples from patients suspected of inborn errors of metabolism, either urine or serum, are run on one-dimensional thin layer chromatography and supplementary chemical tests to detect the abnormal bands and associated abnormalities respectively. Positive samples are further run on HPLC to determine the specific amino acids abnormality. An examples of a case of maple syrup urine disease is discussed, based on the thin layer chromatography findings and HPLC findings.
    Matched MeSH terms: Sensitivity and Specificity
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