Iatrogenic Injury to the Sciatic Nerve due to Intramuscular Injection: A Case Report / 대한신경손상학회지

Iatrogenic injuries due to intramuscular (IM) injection, although less frequently reported than before, are still common. The sciatic nerve is the most commonly injured nerve because of an IM injection owing to its large size and the buttock being a common injection site. Iatrogenic injury to the sciatic nerve resulting from a misplaced gluteal IM injection is a persistent problem worldwide affecting patients in economically rich and poor countries alike. The consequences of sciatic nerve injection injury (SNII) are potentially devastating and may result in serious neurological and medico-legal problems. A 68-year-old male presented with intractable neuropathic pain from SNII that occurred during gluteal IM injection of an analgesic for post-appendectomy pain. This chronic SNII pain did not improve despite his gradual recovery from weakness in the left foot. Partial improvement was seen following an external neurolysis, performed three months post-appendectomy. SNII is a preventable complication of gluteal IM injection. While the complete avoidance of gluteal IM injection is desirable, should need arise, the use of an appropriate administrative technique is recommended.

Comparison of Piroxicam Pharmacokinetics and Anti-Inflammatory Effect in Rats after Intra-Articular and Intramuscular Administration

This study evaluated the pharmacokinetic profile and therapeutic efficacy of piroxicam (PX), a long acting non-steroidal anti-inflammatory drug for the treatment of arthritis, following intra-articular (IA) injection in comparison to the pharmacokinetic profile and therapeutic efficacy of PX after intramuscular (IM) injection. In the pharmacokinetic study in rats, systemic exposure and pharmacokinetic parameters of PX after a single IA dose were compared with systemic exposure and pharmacokinetic parameters of PX after administration of the same dose IM (0.6 mg/kg). The anti-inflammatory and analgesic effects of IA PX were evaluated simultaneously in a monoiodoacetate-induced osteoarthritis rat model. The plasma PX concentration rapidly rose following IA injection, and it was comparable to the plasma PX concentration following IM injection, suggesting the rapid efflux of the drug molecule from the joint cavity. However, in the efficacy study, the IA PX administration significantly reduced the knee swelling by reducing the level of prostaglandin E2 in the joint, compared to that following administration of IA vehicle and after administration of the IM PX dose. In addition, we found that the anti-inflammatory and anti-nociceptive efficacies of IA PX were synergistically increased upon co-treatment with hyaluronic acid (HA), a potent agent for the treatment of osteoarthritis, at the weight ratio of 1:1 or 1:2, and these effects were more pronounced than those following administration of HA or PX alone. In conclusion, this study demonstrated the efficacy of the IA use of PX alone and/or in combination with HA in osteoarthritis.

Neural Substrates of Hanja (Logogram) and Hangul (Phonogram) Character Readings by Functional Magnetic Resonance Imaging

The two basic scripts of the Korean writing system, Hanja (the logography of the traditional Korean character) and Hangul (the more newer Korean alphabet), have been used together since the 14th century. While Hanja character has its own morphemic base, Hangul being purely phonemic without morphemic base. These two, therefore, have substantially different outcomes as a language as well as different neural responses. Based on these linguistic differences between Hanja and Hangul, we have launched two studies; first was to find differences in cortical activation when it is stimulated by Hanja and Hangul reading to support the much discussed dual-route hypothesis of logographic and phonological routes in the brain by fMRI (Experiment 1). The second objective was to evaluate how Hanja and Hangul affect comprehension, therefore, recognition memory, specifically the effects of semantic transparency and morphemic clarity on memory consolidation and then related cortical activations, using functional magnetic resonance imaging (fMRI) (Experiment 2). The first fMRI experiment indicated relatively large areas of the brain are activated by Hanja reading compared to Hangul reading. The second experiment, the recognition memory study, revealed two findings, that is there is only a small difference in recognition memory for semantic transparency, while for the morphemic clarity was much larger between Hanja and Hangul. That is the morphemic clarity has significantly more effect than semantic transparency on recognition memory when studies by fMRI in correlation with behavioral study.

A case of variceal bleeding from the jejunum in liver cirrhosis

While esophagogastric varices are common manifestations of portal hypertension, variceal bleeding from the jejunum is a rare complication of liver cirrhosis. In addition, ectopic variceal bleeding occurs in the duodenum and at sites of previous bowel surgery in most cases, including of stomas. We report a case of obscure overt gastrointestinal bleeding from jejunal varices in a 55-year-old woman who had not previously undergone abdominal surgery, who had liver cirrhosis induced by the hepatitis C virus. Emergency endoscopy revealed the presence of esophageal varices without stigmata of recent bleeding, and no bleeding focus was found at colonoscopy. She continued to produce recurrent melena with hematochezia and received up to 21 units of packed red blood cells. CT angiography revealed the presence of jejunal varices, but no active bleeding was found. Capsule endoscopy revealed fresh blood in the jejunum. The patient submitted to embolization of the jejunal varices via the portal vein, after which she had a stable hemoglobin level and no recurrence of the melena. This is a case of variceal bleeding from the jejunum in a liver cirrhosis patient without a prior history of abdominal surgery.

A Case of Duodenal Anisakiasis with Duodenal Ulcer / 전남의대학술지

Humans can be incidentally parasitized by third-stage larvae of Anisakis species following the ingestion of raw or undercooked seafood. Acute gastric anisakiasis is one of the most frequently encountered complaints in Korea. However, duodenal anisakiasis with duodenal ulcer had not been reported in Korea, despite the habit of eating raw fish. In this case, a 47-year-old man was hospitalized because of sharp epigastric pain and repeated vomiting after eating raw fish 3 days previously. On admission, esophagogastroduodenoscopic examination revealed an active duodenal bulb ulcer. At 5 mm away from the ulcer margin, a whitish linear worm was found with half of its body penetrating the duodenal mucosa. Herein, we report this case of duodenal anisakiasis accompanied by duodenal ulcer.

A Case of Duodenal Anisakiasis with Duodenal Ulcer / 전남의대학술지

Humans can be incidentally parasitized by third-stage larvae of Anisakis species following the ingestion of raw or undercooked seafood. Acute gastric anisakiasis is one of the most frequently encountered complaints in Korea. However, duodenal anisakiasis with duodenal ulcer had not been reported in Korea, despite the habit of eating raw fish. In this case, a 47-year-old man was hospitalized because of sharp epigastric pain and repeated vomiting after eating raw fish 3 days previously. On admission, esophagogastroduodenoscopic examination revealed an active duodenal bulb ulcer. At 5 mm away from the ulcer margin, a whitish linear worm was found with half of its body penetrating the duodenal mucosa. Herein, we report this case of duodenal anisakiasis accompanied by duodenal ulcer.

A Case of Peritoneal Tuberculosis with Poncet's Disease in a Patient Treated with Infliximab

Infliximab is a chimeric mouse/human monoclonal antibody against tumor necrosis factor-alpha (TNF-alpha) that is used worldwide to treat rheumatic disease. However, the reactivation of tuberculosis, including extrapulmonary menifestation, is a severe side effect of anti-TNF-alpha treatment. Mycobacterium tubercluosis causes two forms of joint involvement, TB arthritis and Poncet's disease. Poncet's disease is a rare aseptic form of arthritis, known as reactive arthritis in tuberculosis. We encountered a case of tuberculous peritonitis with Poncet's disease in a 38-yearold man with a history of ankylosing spondylitis that was treated with infliximab. We report this case with a review of the literature.

A Case of Liver Abscess Caused by Fusobacterium nucleatum in a Patient with Recurrent Periodontal Diseases / 대한소화기학회지

Fusobacteria are anaerobic gram-negative, non-spore forming bacilli found in normal flora of the oral cavity, urogenital tract, and gastrointestinal tract. Fusobacterium nucleatum has been seldom reported as a cause of liver abscess, particularly in immunocompetent hosts. A 55-year-old man with frequent periodontal disease visited our hospital with intermittent fever and headache for 2 months. Abdominal CT scan revealed an 8.2x6 cm mass in the right hepatic lobe with central low density. Abscess culture revealed F. nucleatum as the causative organism. Percutaneous abscess drainage and intravenous administration of antibiotics for 4 weeks improved symptoms and decreased the abscess size. We report a rare case of liver abscess due to F. nucleatum in an immunocompetent man with periodontal disease.

A Case of Phlegmonous Gastritis Associated with Marked Gastric Distension

Phlegmonous gastritis is an acute and severe infectious disease that is occasionally fatal if the diagnosis is delayed. Alcohol consumption, an immunocompromised state (e.g., due to HIV infection, rheumatoid arthritis, diabetes mellitus, or adult T-cell lymphoma), and mucosal injury of the stomach are reported to be predisposing factors. The main treatments for phlegmonous gastritis are antibiotics administration or surgery. In this case, the patient's stomach was markedly distended due to long-lasting gastric-outlet obstruction, which is thought to be the predisposing factor for phlegmonous gastritis. We inserted a metal stent at the obstructed site palliatively due to strong refusal by the patient for surgery. The patient recovered after stenting and antibiotic therapy.

Methylation of p16 and E-cadherin in ameloblastoma

INTRODUCTION: Ameloblastic carcinoma is a rare malignant lesion, and may arise from either carcinoma ex-ameloblastoma or de novo carcinoma. Aberrant promoter hypermethylation of the tumor-associated genes leading to their inactivation is a common event in many cancer types. The p16/CDKN2/INK4A gene and p16 5 protein are involved directly in regulating the cell cycles. Cadherins are cell adhesion molecules that modulate the epithelial phenotype and regulate tumor invasion. The aim of this study was to evaluate the roles of p16 and E-cadherin methylation and loss of p16 and E-cadherin expression in the malignant transformation of an ameloblastoma. MATERIALS AND METHODS: Eight cases of ameloblastoma, including 4 benign ameloblastomas without recurrence, 2 benign ameloblastomas with recurrence and 2 carcinoma ex-ameloblastomas, were examined. The promoter hypermethylation profile of the p16 and E-cadherin genes was studied using methylation-specific polymerase chain reaction (MSP) and immunohistochemical staining for p16 and E-cadherin expression. RESULTS: 1) Aberrant CpG island methylation of the p16 gene was detected in 3 of the 4 benign ameloblastomas without recurrence and 1 of the 2 benign ameloblastomas with recurrence. 2) Aberrant CpG island methylation of the E-cadherin gene was found in 1 of the 4 benign ameloblastomas without recurrence. 3) A loss of p16 expression was noted in 1 of 4 benign ameloblastomas without recurrence and 1 of 2 carcinoma ex-ameloblastomas. 4) A loss of E-cadherin expression was noted in 2 of the 4 benign ameloblastomas without recurrence, 1 of the 2 benign ameloblastomas with recurrence and 2 of the 2 carcinoma ex-ameloblastomas. 5) A loss of p16 expression was observed in 1 of the 4 cases showing aberrant methylation of the p16 gene. 6) A loss of E-cadherin expression was observed in 3 benign ameloblastoma case showing aberrant methylation of the E-cadherin gene. CONCLUSION: These results suggest that loss of E-cadherin expression related to the other genetic pathway (not methylation) might be an adjuvant indicator predicting the malignant transformation of an ameloblastoma. However, the number of samples in this study was too small and the relationship between the treatment methods and clinical course were not defined. Therefore, further study will be needed.

A Human Case of Clinostomum complanatum Infection in Korea

A 33-year-old Korean man visited a medical clinic with complaints of throat discomfort and pain for one week. The symptoms occurred one day after eating raw brackish water fish, perch. Endoscopy revealed a fluke, about 5 mm in length, attaching to and peristaltically moving on the surface of the mucosa at the arytenoid region of the larynx. Microscopically, the testes were triangular, tandem, and separated by the uterus. The ovary and cirrus pouch were placed apart from median line between testes. Numerous blood cells were observed in the ceca. The worm was identified to be Clinostomum complanatum. This is the second human case of clinostomiasis in Korea.

Ceramide is Involved in MPP+ -induced Cytotoxicity in Human Neuroblastoma Cells

To understand the cytotoxic mechanism of MPP+, we examined the involvement of ceramide in MPP+ -induced cytotoxicity to human neuroblastoma SH-SY5Y cells. When SH-SY5Y cells were exposed to MPP+, MPP+ induced dose-dependent cytotoxicity accompanied by 2-fold elevation of intracellular ceramide levels in SH-SY5Y cells. Three methods were used to test the hypothesis that the elevated intracellular ceramide is related to MPP+ -induced cytotoxicity: C2-ceramide was directly applied to cells, sphingomyelinase (SMase) was exogenously added, and oleoylethanolamine (OE) was used to inhibit degradation of ceramide. Furthermore, inhibition of ceramide-activated protein phosphatase (CAPP), the effector of ceramide, using okadaic acid (OA) attenuated cell death but treatment of fumonisin B1, the ceramide synthase inhibitor, did not alter the cytotoxic effect of MPP+. Based on these, we suggest that the elevation of intracellular ceramide is one of the important mediators in MPP+ -induced cell death.

Effects of cholecystokinin octapeptide on neuronal activities in the rat nucleus tractus solitarius

Cholecystokinin (CCK) is a gastrointestinal hormone which plays an important role in satiety and gastric motility. It is also widely distributed throughout the central nervous system, where it appears to be involved in the central control of anxiety, feeding behavior and nociception. Two distinct CCK receptor types, CCKA and CCKB, have been found in the brain. Both CCK receptors coexist in the rat nucleus tractus solitarius (NTS), which is the primary center for the coordination of peripheral and central activities related to gastrointestinal, cardiovascular and respiratory functions. In order to study ionic actions of CCK on each type of receptor, we investigated the effects of CCK-8S on neurons located in the NTS of the rat using whole-cell patch-clamp recordings in brainstem slices. Application of CCK-8S, under current clamp, produced a membrane depolarization accompanied by action potential firing. This CCK-evoked excitation was dose-dependent (10 nM ~ 10 micrometer) and observed in more than 60% of NTS neurons. Under voltage clamp conditions, CCK-8S induced an inward current with a notably increased spontaneous excitatory synaptic activity. However, CCK-8S did not significantly change the amplitude of pharmacologically isolated and evoked EPSP(C)s. Using selective CCKA and CCKB receptor antagonists, we observed two different effects of CCK-8S, which suggest CCKA receptor-mediated inhibitory and CCKB receptor-mediated excitatory effects in the NTS. These results may help to explain the ability of CCK to modulate gastrointestinal and other reflex systems in the NTS.

Experimental Study on the Expression of Striatal Dopamine Receptors in the Rat Model of Parkinsonism

No abstract available.

Effect of Repeated Graft of Fetal Mesencephalic Cells in 6-Hydroxydopamine Rat Model of Hemiparkinsonism

OBJECTIVE: In this experimental study, authors evaluated the effect of repeated graft of the fetal midbrain cells on rat model of hemiparkinsonism. MATERIALS AND METHODS: Following injection of the 6-hydroxydopamine into striatum, we examined the behavior (turning response to amphetamine and apomorphine) at 2, 4 and 8 weeks. Their turning behavior persisted until 8 weeks after lesion making. Only those with turning behavior of more than average 6.2turns/minute by amphetamine test were selected for transplantation. Three different methods of transplantation were assigned into three groups and compared with each other to evaluate their efficiencies in improving behavioral responses. In first method, the volume of the transplanted cells were equivalent to that of one fetal midbrain. The volume of the transplanted cells were twice as much as that of one fetal midbrain in a group with second method. The last group consisted of repeated transplantation. Here, we transplanted the same amount of fetal midbrain cells as the in group 2 with two divided doses in one month interval. RESULTS: The second and third group improved from amphetamine test significantly(p<0.05), whereas first group failed to show any significant improvement from same test. The results from second and third group were not significantly different from each other. CONCLUSION: This results suggest that transplantation of two volumes of the fetal midbrain is needed to improve the turning behavior of this model of parkinsonism. This volume can be tansplanted at once or it may be transplanted in two divided volumes with time interval, with similar effect.

The Effect of Propofol for Sedation during Upper Gastrointestinal Endoscopy / 대한소화기내시경학회지

BACKGROUND AND AIMS: This research was conducted in order to study the clinical usefulness and stability of the propofol used for sedation during upper gastrointestinal endoscopy. METHODS: The objective of this research was to study one hundred patients, who were chosen based upon their preference to be examined through diagnostic upper gastrointestinal endoscopy accompanied with propofol from July 1998 to August 1998, and who showed normality in the pulmonary function test and ECG. The elements observed were hemodynamic variations, injection dosage, injection time, recovery time and side effects. RESULTS: All patatints had no recollection of the procedure during gastrointestinal endoscopy. It was found that the older the patients were, the less amount of propofol sleep was indued. Systolic blood pressure, diastolic blood pressure and the mean arterial blood pressure were lowered noticeably after sleep, compared with those before the injection of propofol, while the heart rate hardly changed. CONCLUSIONS: Profopol is believed to be a useful sedative for upper gastrointestinal endoscopy. As blood pressre can be lowered however, a cautious attitude should be considered when injecting propofol in the elderly or in patients who have cardiovascular disease.

Effect of bromocriptine on 6-hydroxydopamine-induced lipid peroxidation and cytotoxicity in vitro and in vivo

The present study was to evaluate the protective effects of bromocriptine, which is known as D2 dopamine receptor agonist and used for the treatment of patients with Parkinson's disease (PD), on 6-hydroxydopamine (6-OHDA)-induced neurotoxicity in vitro and in vivo. Lipid peroxidation product (malondialdehyde; MDA) produced by the administration of 6-OHDA was profoundly reduced following the treatment of bromocriptine in a dose-dependent manner in rabbit brain homogenate. Quinone formation by 6-OHDA autoxidation was also attenuated, and its effect was as potent as other antioxidants. Pretreatment of bromocriptine reduced the cytotoxicity of 6-OHDA on SH-SY5Y neuroblastoma cell lines dose-dependently. The loss of striatal dopamine and its metabolite, DOPAC (dihydroxyphenylacetic acid) as well as increase of MDA production caused by intrastriatal injection of 6-OHDA was significantly recovered following the treatment of bromocriptine. The present study clearly showed that bromocriptine had a protective action against 6-OHDA-induced neurotoxicity. These results suggest that bromocriptine has the antioxidant properties, which could be another advantage for delaying the progress of Parkinson's disease.

A case of esophageal bezoar consisted with candidiasis / 대한내과학회지

Bezoars are persistent concretions of indigestible matter, usually seen in the stomach. But very rarely have bezoars been reported in the esophagus.. Most esophageal bezoars are either phytobezoars or medication bezoars occuring usually in the middle aged & elderly associated with underlying anatomical or functional abnormalities of esophagus. A variety of techniques has been developed recently in diagnostic and therapeutic endoscopy. So endoscopic management is safe and successful in most cases those required surgical management. We experienced an esophageal bezoar consisted with esophageal candidiasis in a patient who underwent esophago-gastric anastomosis and proximal gastrectomy due to early gastric cancer. The bezoar was removed by endoscopy and the esophago-gastric stenosis was treated with balloon dilator without any significant complication.

2 Cases of Endoscopic Ligation Therapy of a Dieulafoy Ulcer / 대한소화기내시경학회지

A dieulafoy ulcer is rarely recognized but is not an uncommon cause of massive, recurrent and frequently fatal gastrointestinal bleeding resulting from the erosion of an unusually large submucosal artery. Although the lesion has been predominantly found in the proximal stomach, it has also been detected throughout the gastrointestinal tract. Diagnosis can be made by observation of protruding and eroded arteries with pulsatile bleeding, or through detection of an adherent thrombus using an endoscopy. In the past, surgical intervention was believed to be the best treatment, but currently, therapeutic endoscopy is more favored, due to its recent success in achieving permanent hemostasis. We experienced 2 cases of Dieulafoy's ulcer of the stomach. Endoscopic ligations using an O ring were performed successfully.

Behavioral and Immunohistochemical Characterization of 6-Hydroxydopamine Induced Rat Models of Parkinson's Disease

There are several methods with which 6-hydroxy-dopamine is injected into the nigrostriatal pathway in rats for making models of Parkinson's disease. One is a complete lesion model in which A9 and A10 dopamine cells are destroyed, and the other one is a partial lesion model in which only A9 dopamine cells are destroyed. The aim of this study is to establish the model most suitable for transplantation of neural tissue. First, the behavioral change was investigated after dopamine releasing(amphetamine) or dopamine agonist(apomorphine) substances were injected. And then, immunohistochemical staining for tyrosine hydroxylase(TH) of the striatum and the substantia nigra was performed. Sixteen complete lesion models of Brundin, 4 complete lesion models of Perese, and 5 partial lesion models of Perese were made. The rotation response to amphetamine injection(5mg/kg, intraperitoneally) was checked 2 weeks after lesion making. For 6 rats, which showed rotation more than 7 turns/minute with amphetamine, the rotation response to subcutaneous injection of apomorphine was examined. Five complete lesion model of Brundin, 1 partial lesion model of Perese and 4 complete lesion model of Perese demonstrated rotation above 7 turns/minute in amphetamine test. Immunohistochemical staining of substantia nigra and corpus striatum for TH was faint on the lesioned side in rats which showed rotation above 7 turns/min in amphetaine-induced rotation test, irrespective of the kinds of model, while those ares of the normal side showed dense staining for TH. However, the results of immunohistochemical staining did not coincide with the results of rotation test by apomorphine.