• Journal of Korean Neurosurgical Society
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• v.40 no.6
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• pp.441-444
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• 2006

Objective : The goal of this study is to evaluate the clinical results in six patients who underwent surgical decompression for the acute subdural hematomas[ASDH] of posterior cranial fossa. Methods : Six patients [five males and one female] who had undergone surgery for ASDH of posterior cranial fossa between 2000 and 2005, were evaluated retrospectively with regard to clinicoradiological findings and surgical outcomes. The mean age was 45.8 years [range $9{\sim}67\;years$]. Results : Preoperative computed tomography showed ASDH on cerebellar hemisphere in four patients and on midline in two. All patients had the associated lesions such as subarachnoid hemorrhage, epidural or subdural hematoma, intraventricular hemorrhage, contusion or pneumocephalus in supratentorial area. Fracture of occipital bone was noted in two patients. Of the four patients who had 13 to 15 of Glasgow coma scale score at the time of admission, three were deteriorated within 24 hours after trauma. Of these three patients, delayed subdural hematoma developed 1 hour after initial normal CT finding in one patient and increased in thickness in another one. Postoperative outcome showed good recovery in three patients and moderate disability in one. Two patients were expired. Conclusion : This study supports that early diagnosis based on strict observation and prompt surgery in the patients with ASDH in posterior fossa will lead to the best results.

• Journal of Korean Neurosurgical Society
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• v.29 no.7
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• pp.968-972
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• 2000

Post-shunting subdural hemorrhages are usually small and self-limited, and they can be recognized on the routine post-operative CT examinations. However, delayed subdural bleeding may occur without any clinical symptoms or signs. Thus the hematoma remains undetected, and it can be increased in size and sometimes become calcified with time. We experienced a case of 15-year-old male with a large calcified subdural hematoma who had undergone shunt operation 10 years previously. With pertinent review of the literatures, we discuss the possible mechanism of calcification and the proper way of treatment in calcified chronic subdural hematoma.

• The Journal of Internal Korean Medicine
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• v.22 no.4
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• pp.647-657
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• 2001

In the oriental medicine field, researches have been in progress regarding oriental medical factors. I also carried out a clinical study on stroke, from which I discovered meaningful results about important factors that impact on the prognosis of stroke. We studied 132 patients after diagnosis of stroke through a Brain-CT scan and MRI sea, to the oriental internal medicine department at the Hospital affiliated to Oriental Medical College, Dongeui University. All the patients showed meaningful improvement in the examination of their symptoms after four weeks, compared with the first week. Between strokes involving meridian system and strokes involving internal organs, the symptom of paralysis caused by strokes involving meridian system, which patients were in favorable initial condition, had improved significantly and that by strokes involving internal organs had not. The group whose initial bowel movement since the stroke was delayed, whose coating on the tongue was thick or the tongue was dry, whose pulse was tachycardiac, or who had a history of hypertension or diabetics showed a significantly worse symptom after 4 weeks than that of groups in the opposite cases.

• ETRI Journal
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• v.38 no.2
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• pp.217-226
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• 2016

We propose an architecture that reduces the power consumption and active area of such a modulator through a reduction in the number of active components and a simplification of the topology. The proposed architecture reduces the power consumption and active area by reducing the number of active components and simplifying the modulator topology. A novel second-order loop filter that uses a single operational amplifier resonator reduces the number of active elements and enhances the controllability of the transfer function. A trapezoidal-shape half-delayed return-to-zero feedback DAC eliminates the loop-delay compensation circuitry and improves pulse-delay sensitivity. These simple features of the modulator allow higher frequency operation and more design flexibility. Implemented in a 130 nm CMOS technology, the prototype modulator occupies an active area of $0.098mm^2$ and consumes 5.23 mW power from a 1.2 V supply. It achieves a dynamic range of 62 dB and a peak SNDR of 60.95 dB over a 15 MHz signal bandwidth with a sampling frequency of 780 MHz. The figure-of-merit of the modulator is 191 fJ/conversion-step.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• v.2 no.1
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• pp.99-103
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• 1999

Duodenal web is an uncommon lesion that infrequently cause partial or complete intestinal obstruction. If the duonenal web is incomplete and only partially obstructs the duodenal lumen, the onset of symptoms may be delayed for years, and obstructive symptoms will be only minimal and intermittent. Congenital duodenal obstruction is occasionally associated with intestinal malrotation. We experienced a case of duodenal web associated with intestinal malrotation in a 9-year-old girl who had been suffered from intermittent projectile vomiting since birth without failure to thrive. The diagnosis was made by UGI series & abdominal CT. Patient remained asymptomatic after operation.

• Journal of Trauma and Injury
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• v.27 no.4
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• pp.208-210
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• 2014

Rupture of the spleen is relatively common, both immediately and in a delayed fashion following significant blunt abdominal trauma. However, atraumatic splenic rupture rarely occurs. Multiple underlying pathologies have been associated with splenic rupture without trauma, including hematological, neoplastic, inflammatory and infectious conditions. In our case, a 21-year-old male without prior medical history visited the hospital with left upper quadrant abdominal pain that had started one day earlier. He had no history of trauma. An abdominal computed tomography (CT) scan found a collection of perisplenic fluid, accompanying a splenic rupture. Due to the patient's stable vital signs and lack of clinical progression of hemorrhage, he underwent conservative treatment. The patient was discharged at day 14 without complication. Rupture of a normal spleen without a history of trauma is not often reported, and it has long been a subject of debate. Ruptures of normal spleen almost always follow some kind of trauma, such as a car accidents or a fall from significant heights. Here, we report a case of spontaneous rupture of a normal spleen in the absence of other medical pathologies or triggering factors.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.33 no.1
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• pp.63-68
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• 2007

Alveolar soft-part sarcoma(ASPS) is a rare, aggressive malignancy of uncertain histologic origin with a propensity for vascular invasion and distant metastasis. ASPS may mimic benign vascular neoplams of malformation but careful evaluation of the unique imaging features on CT scans, MR images, and angiograms lead to the correct diagnosis. ASPS of the tongue is slow-growing, painless mass, especially ASPS of the base the tongue is difficult to be noticed by patient, dentists or oral and maxillofacial surgeons on oral examintion because of its location and clinical resemblance to a benign lesion. And it leads to delayed or inadequate diagnosis. We report radiologic and clinical features of an ASPS of the basal portion of the tongue in a 17-year-old boy, showing normal appearance, but palpation of the tongue and floor of the mouth reveals the tumor. Among the 23 cases of a primary ASPS of tongue reported, 7 cases occured on the basal region of the tongue, inculding the present one. There has been no recurrence or metastasis as of 3 years postoperatively.

• Investigative Magnetic Resonance Imaging
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• v.14 no.2
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• pp.145-150
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• 2010

We report the case of a 16-year-old boy with a solid pancreatic mass which proved to be a nonfunctioning, malignant pancreatic neuroendocrine tumor (PNET). In pediatric patients, malignant pancreatic tumors are rare, especially malignant PNET. When dynamic contrast enhanced MRI showed a well enhancing solid pancreatic tumor on arterial and delayed phases and combined with malignant features, such as vascular invasion, invasion of adjascent organs, and lymphadenopathy, we should include malignant pancreatic neuroendocrine tumor in the differential diagnosis of childhood pancreatic tumors.

• Korean Journal of Bronchoesophagology
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• v.14 no.2
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• pp.57-63
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• 2008

Hypopharyngeal perforation secondary to tracheal intubation is rare, but may result in severe airway complications that include retropharyngeal abscess, pneumothorax, pneumonia, mediastinitis and death. The most common site of hypopharyngeal perforation is the pyriform sinus and the region of the cricopharyngeus muscle. We report a 62-year old man with intubation-induced hypopharyngeal injury presenting as deep neck infection. The patient presented with dyspnea and pain on the neck. Neck CT scan identified fluid and air collection on the neck from the hyoid bone to the thoracic inlet level. Despite of delayed diagnosis, we successfully operated him by using strap muscle myofascial transposition flap. The patient was followed up for 3 months without any complications.

• Childhood Kidney Diseases
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• v.10 no.1
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• pp.72-76
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• 2006

Perinephric abscess is an accumulation of pus in the perinephric space, the area anatomically defined between the kidney and Gerota's fascia. Gram negative organisms are the most prevalent bacterial species found in perinephric abscess. Fever, flank pain, vomiting and abdominal mass are the usual presenting complaints. But with its insidious onset, variable symptoms and rue frequency in children, perinephric abscess has been a major diagnostic problem, leading to delayed diagnosis and inappropriate treatment, which increase the rate of complication and mortality. Clinical diagnosis of perinephric abscess is difficult but must always be considered in children with a febrile septicemic illness. For appropriate treatment, early detection is very important, and either ultrasonography or computed tomography(CT) facilitates the diagnosis and establishment of treatment method. We experienced a case of left perinephric abscess treated by percutaneous drainage in a 1-year 7-month old boy. Review of literature was made briefly.