Diagnostic parameters of minimal hepatic encephalopathy: clinical, electrophysiological, and neuroimaging study

Cirrhotic patients with minimal hepatic encephalopathy [MHE] have subtle cognitive deficits that can be detected by neuropsychometric tests, P300 event related potential, EEG, and increased signal on T1-weighted brain Magnetic Resonance Imaging. The present study was designed to assess the magnitude of cognitive dysfunction, a marker of minimal hepatic encephalopathy [MHE];to evaluate diagnostic usefulness of neuropsychological cognitive tests, EEG, P300 ERP latency, and MRI brain signs; and to investigate the clinical outcome of patients with MHE in terms of progression to overt encephalopathy. A total of 43 well-compensated cirrhotic patients without signs of encephalopathy were studied by neuropsychological cognitive test battery, P300 ERP latency, EEG, conventional MRI brain. The patients were followed-up for 2 yrs. to monitor subsequent episodes of overt encephalopathy. Child-Pugh classification was done throughout the study to assess severity of liver cirrhosis. Forty-six healthy subjects, age, sex, and education matched, served as a control group. Minimal HE was diagnosed in 21[48.8%], out of 43 cirrhotic patients. Inverted sleep rhythm was reported in 85.7%, of cirrhotic with MHE. Delayed P3ERP latency were seen in 38.1% of cirrhotic patients with MHE, while Number Connection Test [NCT-A and B] time were prolonged in 71.4% of the patients. EEG abnormality was detected in 47.6%, while MRI signs were reported in 80.9% of cirrhotic with MHE. Out of 43 patients, 18[41.8%] developed overt encephalopathy, 66.7% of the patients with MHE progressed to overt encephalopathy within a mean duration of 9 months, while only 13. 6% of the non-mHE patients did so. Of the patients who developed overt encephalopathy, 83.3% had abnormal EEG, 77. 8% had abnormal NCT, while 59. 3% had P3ERP latency prolongations. The results of the present study suggest that inverted sleep rhythm, abnormal NCT, slow EEG activity, and delayed P300 latency are valid tools for the screening of MHE in cirrhotic patients as there is a greater likelihood of overt encephalopathy development in patients with an abnormality detected by these tests than in patients without such abnormality. EEG is useful for follow-up screening and prediction of the development of overt hepatic encephalopathy

Concentration of some trace element in the serum, hair and nail of alopecia areata patients

Fifty three subjects [41 patients with alopecia areata and 12 matched controls] were selected for this study. The alopecia group comprised 25 males and 16 females with age varying from 10 to 40 years. Thirty one patients had alopecia areata and 10 patients had alopecia totalis. Fifteen patients had nail changes. Zinc, iron, copper and magnesium were estimated in the serum samples of all individuals of the study [41 patients and 12 controls] and the hair and nail samples of 42 subjects [30 patients and 12 controls] by the use of atomic absorption spectrophotometry. No statistically significant differences were found between trace elements concentrations in patients compared to controls except for low hair and nail zinc. Also patient with nail changes have a significant nail zinc as compared to those nail changes. According to these results we can speculate that trace elements have no proven role in the pathogenesis alopecia areata except for zinc which may be involved in the pathogenesis of this disease