• Journal of Yeungnam Medical Science
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• v.37 no.4
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• pp.329-331
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• 2020

Negative myoclonus (NM) is a shock-like jerky involuntary movement caused by a sudden, brief interruption of tonic muscle contraction. NM is observed in patients diagnosed with epilepsy, metabolic encephalopathy, and drug toxicity and in patients with brain lesions. A 55-year-old man presented with NM in both his arms and neck. He has taken medications containing tramadol at a dose of 80-140 mg/day for 5 days due to common cold. He had no history of seizures. Acute lesions were not observed during magnetic resonance imaging, and abnormal findings in his laboratory tests were not noted. His NM resolved completely after the discontinuation of tramadol and the oral administration of clonazepam. Our case report suggests that tramadol can cause NM in patients without seizure history or metabolic disorders, even within its therapeutic dose.

• Toxicological Research
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• v.27 no.3
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• pp.133-135
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• 2011

The FDA guidance focuses on the use of the NOAEL to establish the maximum recommended starting dose. The majority of NOAEL has been described inaccurately or incompletely in final reports for 90-days repeated dose toxicity test based on GLP (good laboratory practice) regulation. This is the most serious one of reasons for why most pharmaceutical companies targeting global markets have disregarded the final report produced from GLP facilities in Korea. The problems in deciding NOAEL reflected in the final reports are mainly due to the followings; 1) Inaccurate description or use of NOEL, NOAEL and LOAEL, 2) Insufficient and inappropriate interpretations in findings from toxicity test. This paper is intended to provide the insight into distinguishing NOAEL from NOEL and LOAEL, and into classifying findings from toxicity test. Here, the three step method is newly suggested by applying the weight-based classification to the NOEL, NOAEL and LOAEL based on the findings.

• Journal of Chest Surgery
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• v.28 no.4
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• pp.426-430
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• 1995

Pancoast tumor was specific lung carcinoma that has been symptoms and signs according to locations. It was located in peripheral,and involved the extrathoracic structures more than parenchyme of the lung. At 1838, Hare reported it, and at 1932 Pancoast was first described it. Prior to 1950,superior sulcus tumor was considered uniformly fatal, but at 1961 Paulson and Shaw advocated the use of preoperative irradiation therapy and followed by an extended en bloc resection. Recently we were experienced 2 cases of pancoast tumor managed with same method. One was 60-years old man that has been recommended preoperative radiation therapy with dose of 3000 cGy to 20 fractions and followed resection after 4 weeks, the other was 53-years old man that has been recommended a dose of 4000 cGy to 20 fractions and followed resection after 4 weeks. On tumor histology first case was large cell carcinoma and second case was squamous cell carcinoma. all patients was complicated atelectasis. First patient was expired with brain metastasis after 17 months, second was expired after 6 months.

• Journal of Plant Biotechnology
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• v.40 no.3
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• pp.111-124
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• 2013

Research on the basic interaction of radiation with biological systems has contributed to human society through various applications in pharmaceutical, medicine, agriculture and other technological developments. In the agricultural sciences and food technology sectors, the last few decades have witnessed a large number of pertinent works regarding the utilization of radiation for evolution of superior varieties of agricultural crops of economic importance. This review presents general information about the effect of radiation on plant specificity, dose response, and benefits. There has been summarized of the effects observed after exposure and influenced by several factors including plant characteristics and radiation features. We also report on the effect of ${\gamma}$-irradiations on plants, focusing on metabolic alterations, modifications of growth and development and changes in biochemical pathways.

• The Korean Journal of Nuclear Medicine
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• v.35 no.6
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• pp.393-397
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• 2001

Surgery, radioiodine therapy, and thyroxine treatment represent established therapeutic measures of proven efficacy for the treatment of well-differentiated thyroid cancer. However, in some cases, dedifferentiation is noted and it makes tumors refractory to conventional treatment. Recently, retinoic acid redifferentiation therapy was evaluated in several in vitro and in vivo studios. We report a patient with papillary carcinoma in whom metastatic lesions became radioiodine negative on high-dose therapy. Redifferentiation therapy with retinoic acid induced radioiodine uptake in some of metastatic tissues. Side effects such as xerostomia and cheilosis were mild. We recommend retinoic acid redifferentiation therapy as an option for the treatment of thyroid cancer with negative radioiodine uptake after high-dose radioiodine therapy.

• The Korean Journal of Pain
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• v.20 no.1
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• pp.71-73
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• 2007

Tricyclic antidepressant (TCA) is a useful drug for treating neuropathic pain. However, tremors are one of the relatively frequent side effects of TCA. A female patient, who was suffering from postherpetic neuralgia, was treated with amitriptyline starting with 10 mg/day. She developed resting tremors on the second day after increasing the dose to 30 mg/day. This case highlights the need for the careful use of amitriptyline in the treatment of neuropathic pain in elderly patients.

• International journal of thyroidology
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• v.11 no.2
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• pp.71-74
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• 2018

Adverse events such as hemoptysis and gastrointestinal hemorrhage during tyrosine kinase inhibitor treatment are relatively rare, but the severity of the bleeding can be higher than other common adverse events. It is necessary to educate patients about its possibility so that they can be found early. In this case report of radioiodine refractory thyroid cancer patient, hemoptysis and gastrointestinal bleeding has occurred following lenvatinib administration. Drug interruption and dose modification and dose interruption were required in addition to management for bleeding itself. It is necessary to confirm the high risk of bleeding before the administration of tyrosine kinase inhibitors, and to appropriately control the follow-up interval and drug dosage accordingly.

• Korean Journal of Radiology
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• v.19 no.6
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• pp.1179-1186
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• 2018

Objective: The purposes of this study were to evaluate size-specific dose estimate (SSDE) of low-dose CT (LDCT) in the Korean Lung Cancer Screening (K-LUCAS) project and to determine whether CT protocols from Western countries are appropriate for lung cancer screening in Korea. Materials and Methods: For participants (n = 256, four institutions) of K-LUCAS pilot study, volume CT dose index ($CTDI_{vol}$) using a 32-cm diameter reference phantom was compared with SSDE, which was recalculated from $CTDI_{vol}$ using size-dependent conversion factor (f-size) based on the body size, as described in the American Association of Physicists in Medicine Report 204. This comparison was subsequently assessed by body mass index (BMI) levels (underweight/normal vs. overweight/obese), and automatic exposure control (AEC) adaptation (yes/no). Results: Size-specific dose estimate was higher than $CTDI_{vol}$ ($2.22{\pm}0.75mGy$ vs. $1.67{\pm}0.60mGy$, p < 0.001), since the f-size was larger than 1.0 for all participants. The ratio of SSDE to $CTDI_{vol}$ was higher in lower BMI groups; 1.26, 1.37, 1.43, and 1.53 in the obese (n = 103), overweight (n = 70), normal (n = 75), and underweight (n = 4), respectively. The ratio of SSDE to $CTDI_{vol}$ was greater in standard-sized participants than in large-sized participants independent of AEC adaptation; with AEC, SSDE/$CTDI_{vol}$ in large- vs. standard-sized participants: $1.30{\pm}0.08$ vs. $1.44{\pm}0.08$ (p < 0.001) and without AEC, $1.32{\pm}0.08$ vs. $1.42{\pm}0.06$ (p < 0.001). Conclusion: Volume CT dose index based on a reference phantom underestimates radiation exposure of LDCT in standard-sized Korean participants. The optimal radiation dose limit needs to be verified for standard-sized Korean participants.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.16 no.3
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• pp.303-308
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• 1994

The ameloblastoma is considered to be a slowly growing locally invasive tumor with a high rate of recurrence if not removed adequately. Ameloblastoma generally dose not metastasize to distant places. In very rar case, ameloblastoma changed its histologic appearance to carcinoma or showed distant metastasie, these generally called malignant ameloblastoma. Inadequate surgical procedures, radiation therapy, and a long duration of this tumor seem to have significant relation to the development of metastasis. Therefore, adequate surgical treatment of the primary lesion plays an important role in the prevention of metastasis postoperatively. This report described an instance of malignant ameloblastoma and review of literature.

• The Korean Journal of Pain
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• v.12 no.2
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• pp.242-245
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• 1999

Gabapentin is an oral antiepileptic agent with an unknown mechanism of action. There have been many proposed uses for gabapentin, including neuropathic pain, reflex sympathetic dystrophy, postherpetic neuralgia, midscapular pain secondary to radiation myelopathy and migraine prophylaxis. This report presents patients who were treated with gabapentin when other pharmacologic interventions failed to relieve neuropathic pain 3 patients with neuropathic pain were included among these cases. All patients were started on 200 mg gabapentin. The maximum dose required for pain relief was between 800 mg and 2400 mg. Gabapentin may be a useful adjunct for treating neuropathic pain with minimum of side effects.