• The Journal of the Korean bone and joint tumor society
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• v.6 no.2
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• pp.106-111
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• 2000

Focal fibrocartilaginous dysplasia(FFCD) is an uncommon, benign condition associated with unilateral tibia vara among young children. FFCD has a typical plain radiographic finding, which has a concave radiolucent defect in the metadiaphyseal junction of medial aspect of the proximal tibia. The varus deformity occurs at the site of the lesion. Spontaneous remodeling and resolution of bony defect may be expected, but the corrective osteotomy may also be needed in some cases. The authors described a case of unilateral tibia vara caused by FFCD, diagnosed by excisional biopsy and treated with dome-shaped proximal tibial osteotomy and bone graft.

• Radiation Oncology Journal
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• v.37 no.4
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• pp.302-308
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• 2019

The abscopal effect is a term that has been used to describe the phenomenon in which localized radiation therapy treatment of a tumor lesion triggers a spontaneous regression of metastatic lesion(s) at a non-irradiated distant site(s). Radiation therapy induced abscopal effects are believed to be mediated by activation and stimulation of the immune system. However, due to the brain's distinctive immune microenvironment, extracranial abscopal responses following cranial radiation therapy have rarely been reported. In this report, we describe the case of 42-year-old female patient with metastatic melanoma who experienced an abscopal response following her cranial radiation therapy for her brain metastasis. The patient initially presented with a stage III melanoma of the right upper skin of her back. Approximately 5 years after her diagnosis, the patient developed a large metastatic lesion in her upper right pectoral region of her chest wall and axilla. Since the patient's tumor was positive for BRAF and MEK, targeted therapy with dabrafenib and trametinib was initiated. However, the patient experienced central nervous system (CNS) symptoms of headache and disequilibrium and developed brain metastases prior to the start of targeted therapy. The patient received radiation therapy to a dose of 30 Gy delivered in 15 fractions to her brain lesions while the patient was on dabrafenib and trametinib therapy. The patient's CNS metastases improved significantly within weeks of her therapy. The patient's non-irradiated large extracranial chest mass and axilla mass also shrank substantially demonstrating the abscopal effect during her CNS radiation therapy. Following radiation therapy of her residual chest lesions, the patient was disease free clinically and her CNS lesions had regressed. However, when the radiation therapy ended and the patient continued her targeted therapy alone, recurrence outside of her previously treated fields was noted. The disease recurrence could be due to the possibility of developing BRAF resistance clones to the BRAF targeted therapy. The patient died eventually due to wide spread systemic disease recurrence despite targeted therapy.

• Asian Pacific Journal of Cancer Prevention
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• v.14 no.12
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• pp.7719-7724
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• 2013

Background: Overexpression of survivin, a known inhibitor of apoptosis, is associated with tumor progression and drug resistance in numerous malignancies, including leukemias. The aim of this study was to investigate the effect of a specific survivin small interference RNA (siRNA) on proliferation and the sensitivity of HL-60 acute myeloid leukemia (AML) cells to the chemotherapeutic drug etoposide. Materials and Methods: The cells were transfected with siRNAs using Lipofectamine $^{TM}2000$ transfection reagent. Relative survivin mRNA and protein levels were measured by quantitative real-time PCR and Western blotting, respectively. Trypan blue exclusion assays were performed to monitor tumor cell proliferation after siRNA transfection. The cytotoxic effects of etoposide and survivin siRNA, alone and in combination, on leukemic cells were determined using MTT assay. Apoptosis was assessed by ELISA cell death assay. Results: Survivin siRNA markedly reduced both mRNA and protein expression levels in a time-dependent manner, leading to distinct inhibition of cell proliferation and increased spontaneous apoptosis. Surprisingly, survivin siRNA synergistically increased the cell toxic effects of etoposide. Moreover, survivin down-regulation significantly enhanced its induction of apoptosis. Conclusions: Our study suggests that down-regulation of survivin by siRNA can trigger apoptosis and overcome drug resistance of leukemia cells. Therefore, survivin siRNA may be an effective adjuvant in AML chemotherapy.

• Clinical and Experimental Pediatrics
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• v.46 no.12
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• pp.1279-1282
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• 2003

Neuroblastoma is the most common intraabdominal malignant tumor of childhood, with 40% arising from the adrenal gland. Bilateral adrenal involvement from synchronous development or metastatic spread of tumor is rarely seen in children with neuroblastoma. The patient was born with a spontaneous vaginal delivery. Birth weight was 3,200 g. Fetal ultrasonography showed a left adrenal cystic mass. At two weeks of age, she was admitted due to a massive abdominal distension and tachypnea. Percutaneous ultrasonography guided biopsy of the left adrenal mass was performed. The result of the biopsy was neuroblastoma. Vincristine and cyclophosphamide were administerd intravenously and 450 cGy of irradiation was added. Left adrenalectomy was accomplished and postoperative course was uneventful. The patient received cancer chemotherapy with a combination of carboplatin, ifosfamide and VP-16 and is now being followed up for three months. We have experienced a case of congenital bilateral neuroblastoma and report the case with brief review of related literatures.

• Journal of Korean Neurosurgical Society
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• v.65 no.3
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• pp.430-438
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• 2022

Objective : Dermoid cysts are uncommon in spinal cord tumors, and the phenomenon of their spontaneous rupture into the syrinx cavity is quite rare. We aimed to analyze the imaging characteristics and etiologies, and propose some surgical strategies, for this uncommon phenomenon. Methods : We retrospectively reviewed 14 cases with spinal dermoid cysts that ruptured into the cervical and thoracic syrinx cavity. There were six male and eight female cases, aged 21 to 46 years, who had lipid droplets in the syrinx cavity from C1 to L3. The dermoid cysts were always located at the conus. Based on patients' complaints, clinical manifestations, and imaging results, we adopted tumor excision and/or syrinx cavity aspiration in one stage or multiple stages. Results : Three patients had only a syrinx cavity aspiration surgery due to a history of dermoid cyst excision. Eight patients had dermoid cyst resection and syrinx cavity aspiration in one stage. One patient was operated upon in two stages due to the development of new symptoms at nine months follow-up. Two patients underwent only tumor resection since they did not show similar symptoms or signs caused by the cervicothoracic syrinx. The axial magnetic resonance imaging indicated that the lipid droplets were always not at the center but were eccentric. The clinical effect was satisfactory during the follow-up period in this group. Conclusion : The lipid droplets filled the spinal syrinx cavity, not entirely confined to the central canal. Based on the chief complaints and associated signs, we adopted different surgical strategies and had satisfactory clinical results.

• Journal of Yeungnam Medical Science
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• v.22 no.1
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• pp.104-112
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• 2005

Because of location, a mediastinal mass may cause complications such as a major airway obstruction, a superior vena caval obstruction, and cardiac compression during general anesthesia. The patient's condition need to be assessed by several methods to predict the risks associated with general anesthesia. The authors took computed tomographs for a preoperative evaluation of two patients with an anterior mediastinal mass, and the risk of perioperative complications was predicted by measuring the tracheal area. The patients were managed according to the preoperative evaluation but severe ventilation impairments were encountered during anesthesia. In one patient, stable ventilation could not be maintained until spontaneous breathing appeared. The operation was cancelled and the patient was brought into the ICU. In the other patient, a tracheal tube was inserted deeper in an attempt to pass the narrowed tracheal portion due to mediastinal tumor compression resulting in improved ventilation.

• Korean Journal of Clinical Laboratory Science
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• v.37 no.2
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• pp.123-128
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• 2005

Magnetoencephalography (MEG) is the measurement of the magnetic fields produced by electrical activity in the brain, usually conducted externally, using extremely sensitive devices such as Superconducting Quantum Interference Device (SQUID). MEG needs complex and expensive measurement settings. Because the magnetic signals emitted by the brain are on the order of a few femtoteslas (1 fT = 10-15T), shielding from external magnetic signals, including the Earth's magnetic field, is necessary. An appropriate magnetically shielded room is very expensive, and constitutes the bulk of the expense of an MEG system. MEG is a relatively new technique that promises good spatial resolution and extremely high temporal resolution, thus complementing other brain activity measurement techniques such as electroencephalography (EEG), positron emission tomography (PET), single-photon emission computed tomography (SPECT) and functional magnetic resonance imaging (fMRI). MEG combines functional information from magnetic field recordings with structural information from MRI. The clinical uses of MEG are in detecting and localizing epileptic form spiking activity in patients with epilepsy, and in localizing eloquent cortex for surgical planning in patients with brain tumors. Magnetoencephalography may be used alone or together with electroencephalography, for the measurement of spontaneous or evoked activity, and for research or clinical purposes.

• Journal of the Korean Arthroscopy Society
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• v.10 no.1
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• pp.91-94
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• 2006

Synovial hemangioma of the knee joint has been reported as a rare cause of pain, limitation of motion and hemarthrosis, often seen as an internal derangement of the knee. A 39-year-old woman presented with spontaneous hemarthrosis of the left knee joint and physical exam revealed a small painful mass adjacent to the medial side of the patella. Magnetic resonance imaging revealed an intra-articular tumor. Arthroscopic excision was performed and the histology was characteristic of hemangioma. Through this case, we discuss the diagnosis and treatment options for the synovial hemangioma of the knee.

• Proceedings of the KSAR Conference
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• 2000.10a
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• pp.5-6
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• 2000

Nitric oxide (NO) is a simple combined molecule of oxygen and nitrogen, and has a wide variety of action on the physiological and pathophysiological function of the body. It is a key transducer of the vasodilator message from the endothelium to vascular cells. However, its different roles have been elucidated by numerous researches, which was undertaken in the 80's and 90's. Three types of NO synthase were involved in synthesizing NO and they are identified in different tissues and cells including macrophage, endothelial cells and even tumor cells. In the late 90's, we undertook a number of researches for elucidating the effect of NO on embryo development, since developmentally arrested bovine embryos contained large amount of NO metabolites in their cytoplasm. Subsequently, we found that the addition of a spontaneous NO donor to culture medium markedly inhibited embryo development and that its inhibitory role was independent of embryonic genome activation. Research was focused to find a way to prevent the inhibitory action of NO on embryo development and demonstrated that the addition of hemoglobin, a NO scavenger, to embryo culture medium greatly stimulated in vitro-development of bovine and mouse embryos. Based on these research outcomes, we developed a NO action-free culture system for embryos and other tissues. The efficacy of such system has subsequently been confirmed by achieving the high rates of preimplantation development and blastocyst formation in the NO action-free culture of mouse and bovine embryo. In this article, we briefly introduced the nature of NO and our research outcomes on the role of NO in embryo development.

• Korean Journal of Veterinary Research
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• v.56 no.3
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• pp.183-187
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• 2016

The effects of antlers have long been known in traditional Asian medicine. However, few studies have investigated the effects of antlers on immunity. In this study, we investigated whether fermented antler extract (FAE) has immunomodulatory effects on spleen cells. FAE enhanced the activity of spleen cells in a concentration dependent manner compared to antler extract. Interestingly, FAE significantly increased the production of interleukin-12, a representative cytokine of cell-mediated immunity, while it marginally increased that of tumor necrosis factor-alpha. Flow cytometry analysis demonstrated that FAE can protect spleen cells from spontaneous cell death without a significant proportional change in subsets, mainly lymphocytes. Taken together, the results of the present study showed that FAE has beneficial effects on spleen cells, a major type of immune cell, indicating that it can function as an immunomodulator without significant cytotoxicity. These data may broaden the use of FAE in basic research and clinical areas.