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홍승철,김동호,김현집,한대희,심보성,지제근 대한신경외과학회 1984 Journal of Korean neurosurgical society Vol.13 No.3
The usual symptoms of brain tumors are signs of increased intracranial pressure, seizures, and focal neurologic deficits. Hemorrhage occasionally occurs in brain tumor, and it may sometimes be sudden and massive. The apoplectic symptom due to sudden tumor bleeding can mimic cerebrovascular accident. The authors review literatures and present 2 cases of oligodendrogliomas initially manifested as spontaneous intracranial hemorrhage.
홍승철,최길수 대한신경외과학회 1985 Journal of Korean neurosurgical society Vol.14 No.2
Authors report on the general features of postoperative central nervous system infection in patients undergoing neurosurgical procedures. The postoperative central nervous system infection was defined as 1) emergence of purulent material from any site that had been exposed to surgical field, and/or 2) development of meningitis during postoperative recovery period. The materials were obtained from 50 cases of postoperative central nervous system infection out of 1,232 cases of operations that had been performed in neurosurgical department of Seoul National University Hospital during the last three years. Various predisposing factors, associated problems, and therapeutic aspects are discussed. General features of hospital infection are also considered.
전자장 노출에 따른 Melatonin 대사저하 및 리듬 변화
홍승철 한양대학교 의과대학 1999 한양의대 학술지 Vol.19 No.2
Marked increase of electric use in our daily lives has expanded our exposures to electromagnetic fields(EMF) whose effects on human health have long been out of scientific concern. Exposures to EMF are weakly but consistently associated with incidence of cretain types of cancer, particularly leukemia, brain tumor and breast cancer, and, moreover, may have detrimental effects on reproduction. In spite of many suggestive epidemiological data, biological mechanisms linking/underlying between exposures to EMF and the suggested outcomes have not been clarified well yet. Melatonin(N-acetyl-5-methoxytryptamine), a principal hormone of pineal gland,is synthesized from serotonin by the action of N-acetyltransferase(NAT) and hydroxyindole-O-methyltransferase(HIOMT). The possible linkage between the mechanism of breast cancer incidence and suppression of pineal melatonin production has been hypothesized, based on the results of studies that reduction of pineal melatonin production. This review will discuss the findings from the results of relationship EMF exposure and the change of melatonin secretion and their circadian rhythm.
홍승철,송정민,정종현,권용실,한진희 대한신경정신의학회 2003 신경정신의학 Vol.42 No.5
Narcolepsy is a sleep disorder characterized by excessive daytime sleepiness, cataplexy, sleep paralysis, hypnagogic hallucinations and disrupted nocturnal sleep. We report on a patient with a diagnosis of schizophrenia who was subsequently diagnosed with narcolepsy. The case history of a 22-year-old woman with concomitant narcolepsy and psychotic symptoms is discussed from the perspective of the diagnosis and therapeutic challenges, in particular, pharmacological treatment, raised by their coexistence.