No abstract available.
Peptic Ulcer*

PURPOSE: Mutations in the p53 gene have been recognized in brain tumor, and clonal expansion of p53 mutant cells has been shown to be associated with glioma progression. However, studies on the p53 gene have been limited by the need for fresh frozen tissues. We have tried a method utilizing polymerase chain reaction (PCR) for the direct DNA sequecing of the p53 gene using a single 10 m paraffin-embedded tissue section. We applied this method to detect for p53 gene mutations in exons 5~8 in human astrocytoma utilizing paraffin-embedded tissues. MATERIALS AND METHODS: Twenty paraffin blocks containing tumor were selected from surgical specimens from twenty different cases. Tumors included 10 astrocytomas and 10 anaplastic astrocytomas. Ten controls were also selected among autopsy cases showing normal brain in light microscopy. The tissue section on the stained glass slide was used to guide microdissection of an unstained adjacent tissue section to ensure above 90% of the tumor cell population for p53 mutational analysis. RESULT: Mutation in the p53 gene was identified in 1 of 10 (10%) anaplastic astrocytomas. Mutations in the p53 gene were identified in 1 of 10 cases (10%) by PCR and direct DNA sequencing. Mutation in exon 7 resulting in amino acid substitution was found in one anaplastic astrocytoma (codon 245, GGC-->GAC: glycine-->aspartic acid). Ten control cases, ten astrocytomas and nine anaplastic astrocytomas were confirmed to be negative by direct sequencing of amplified DNA. CONCLUSION: This study demonstrates the feasibility of evaluating p53 gene mutations in archived astrocytoma specimens using PCR and direct DNA sequencing on paraffin sections. Application of this method should facilitate investigation of the role of p53 gene mutations in tumor biology.
Amino Acid Substitution ; Astrocytoma ; Autopsy ; Biology ; Brain ; Brain Neoplasms ; DNA* ; Exons ; Genes, p53* ; Glass ; Glioma ; Humans ; Microdissection ; Microscopy ; Paraffin ; Polymerase Chain Reaction ; Sequence Analysis, DNA*

No abstract available.
Thumb*

PURPOSE: The aim of this study was to identify clinical predictive factors for tumor response after preoperative chemoradiotherapy (CRT) in rectal cancer. MATERIALS AND METHODS: The study involved 51 patients who underwent preoperative CRT followed by surgery between January 2005 and February 2012. Radiotherapy was delivered to the whole pelvis at a dose of 45 Gy in 25 fractions, followed by a boost of 5.4 Gy in 3 fractions to the primary tumor with 5 fractions per week. Three different chemotherapy regimens were used (5-fluorouracil and leucovorin, capecitabine, or tegafur/uracil). Tumor responses to preoperative CRT were assessed in terms of tumor downstaging and pathologic complete response (ypCR). Statistical analyses were performed to identify clinical factors associated with pathologic tumor response. RESULTS: Tumor downstaging was observed in 28 patients (54.9%), whereas ypCR was observed in 6 patients (11.8%). Multivariate analysis found that predictors of downstaging was pretreatment relative lymphocyte count (p = 0.023) and that none of clinical factors was significantly associated with ypCR. CONCLUSION: Pretreatment relative lymphocyte count (%) has a significant impact on the pathologic tumor response (tumor downstaging) after preoperative CRT for locally advanced rectal cancer. Enhancement of lymphocyte-mediated immune reactions may improve the effect of preoperative CRT for rectal cancer.
Chemoradiotherapy ; Deoxycytidine ; Fluorouracil ; Humans ; Leucovorin ; Lymphocyte Count ; Multivariate Analysis ; Pelvis ; Rectal Neoplasms ; Capecitabine

A pathological study was done to elucidate sequential changes of the lungs in various time intervals following experimental paragonimiasis in 15 dogs and 15 cats. The dogs and cats were fed with 30-50 metacercariae of Paragonimus westermani, and were sacrificed at 15, 20, 30, 45, 60, 90 and 120 days after infection respecively. Autopsies were performed immediately after death. Gross and microscopic examination of the lungs showed following findings: There were no qualitative difference in pathological findings between dogs and cats. Pathological findings were first noticed at 20 days of infection in thoracic cavity, which consisted of fibrinous plueritis along with superficial hemorrhage. Although no worm was found in the lung parenchyma at this period, juveniles were seen in pleural cavity together with turbid effusion. Paragonimus juveniles were first recognized inside the lung parenchyma by 30 days of infection. This was the period when the lungs showed multiple areas of hemorrhage and probably active penetration by smaller worms. Hemorrhagic bronchopneumonia was quite pronounced from this stage through 45 days of infection. Paragonimus worm cyst was essentially composed of fibrous scar and heavy inflammatory cellular infiltrate. The lining epithelial cells were first became noticed by 2 months of infection. And these epithelial cells were thought to be probably transformed alveolar lining cells rather than bronchiolar epithelial cells. As the infection progress, the cyst wall became more stabilized and often showed squamous metaplasia. Fibrinous pleuritis with pleural effusion was very prominent finding in early periods of infection. Bronchiolitis and focal vascular sclerosis were often seen in experimental paragonimiasis.
parasitology-helminth-trematoda ; Paragonimus westermani ; paragonimiasis ; pneumonia ; cyst ; hemorrhage ; pleuritis ; effusion ; bronchiolitis ; sclerosis

It has been well known that ischemia reperfusion injury to skeletal muscle following an acute arterial occlusion causes significant morbidity and mortality. There are many causes of reperfusion injury, but the oxygen free radicals have a significant role. During ischemia the ATP is catalyzed to hypoxanthine anaerobically and hypoxanthine dehydrogenase is converted to xanthine oxidase under the presence of O2 resulting in the production of cytotoxic oxygen free radical, which are harmful to muscle. The reactivity of superoxide dismutase(SOD), one of the major antioxidant enzymes, is increased against the formation of the superoxide radical during reperfusion. SOD metabolyzes the superoxide radical to H2 O2 and O2.The severity of ischemic damage deports on the duration of muscle ischemia. The reversible changes in the muscle occur afar 2 hours of ischemia and recover within 24 hours after reperfusion. After 6 hours ischemia, irreversible damage occurs and causes necrosis of muscle. The authors performed the resent study to investigate the changes of Mn-SOD and the effects of allopurinol, the inhibitor of xanthine oxidase, by measuring the immunoreactivitiy of the ischemic reperfused rectus femoris muscle of rats after 2 hours and 6 hours ischemia and timely reperfusion. A total of 176 healthy spraque-Dawley rats weighing from 200 gm to 250 gm were used. Under urthane(3.0 gm/kg.,IP) anesthesia, a lower-abdominal incision was made and the left common iliac artery was ligated by using a vascular clamp for 2 hours and 6 hours. Rectus femoris muscle was obtained at 0 hour, 1 hour, 2 hours, 24 hours, and 48 hours after removal of the vascular clamp. The specimens were sectioned in 14micro miter thickness with a cryostat. The immunoreactivities of Mn-SOD were observed by using Mn-SOD antibodies. The result were as follows. 1. The immunoreactivies of Mn-SOD around sarcolemma were stronger than those on the sarcoplasm. 2. The immunoreactivities of Mn-S0D after 2 hours of ischemia increased to moderate or weak reactivities at 1 hour and 2 hours of reperfusion and returned to week or trace reactivities at 24 hours and 48 hours of reperfusion 3. The pretreatment of allopurinol decreased the immunoreactivies of Mn-SOD during reperfusion. The pattern of changes of SOD immunoreactivies were similar, but the range of changes significantly decreased. 4. The immunoreactivies of Mn-SOD after 6 hours of ischemia increased after 6 hours of ischemia increased after reperfusion and showed peak at 2 hours and 24 hours specimen. After 48 hours in the reperfused group, the reactivities slightly decreased. 5. After 6 hours in the ischemia-reperfused group, the pretreatment of allopurinol decreased the immunoreactivies of Mn-SOD during reperfusion, but the effects were weak. These results suggest that the immunoreactivities of the 6 hours ischemia reperfused group were higher than those of 2-hours ischemia reperfused group in the rectus femoris muscle of rats and that allopurinol pretreatment can be credited with decreasing ischemia reperfusion injury within a reversible period.
Adenosine Triphosphate ; Allopurinol ; Anesthesia ; Animals ; Antibodies ; Free Radicals ; Hypoxanthine ; Iliac Artery ; Ischemia ; Mortality ; Muscle, Skeletal ; Necrosis ; Oxygen ; Quadriceps Muscle* ; Rats* ; Reperfusion Injury* ; Reperfusion* ; Sarcolemma ; Superoxide Dismutase* ; Superoxides ; Xanthine Oxidase

Changes of abdominal organs in early paragonimiasis are described in dogs and cats. Experimental infection was induced by feeding 40-50 and 20-30 metacercariae of Paragonimus westermani to 15 dogs and 15 cats respectively. These animals were killed sequentially starting from 8 days to 120 days after infection. Complete autopsies were carried out in all animals and the tissues were examined microscopically with the main emphasis on changes of the liver and the diaphragm. A definite bout of acute diffuse fibrinoexudative peritonitis with ascites ranging from 5 to 20 ml was present in both dogs and cats at the time of 20 days after infection. This was also the period of the maximum liver damage and diaphragmatic injuries. The peritonitic changes became minimized after 45 days of infection. The liver changes were of two folds. The first one was characterized by numerous pin-point or linear tissue defects on the surface of the lobes, which were often covered with fibrin clots. Some of these defects were impacted by the larvae. These 'scratch' marks appeared to be of mechanical effect, and the margins were often banal without a significant inflammatory reaction. The scratch marks were no longer observed in animals examined after 45 days. The second was noted in the Kupffer cells of the liver. A large amount of hemosiderin pigment was noted in the Kupffer cells and became prominent by 20 days through 45 days. Hemosiderin-laden macrophages were found also in the spleens of these animals. Some animals in 30 days group showed the most Kupffer cells heavily loaded with hemosiderin. However, no associated degenerative changes were noted in these cells. The diaphragm was quite unique in early phase of infection in all animals examined. Numerous pinpoint perforative lesions could definitely be seen grossly, and some of these lesions included migrating larval worms inside the tunnels. These lesions were microscopically characterized by tract or tunnel formation with accompanying tissue reaction. The diaphragmatic changes were manifest by 20 days after infection. The tracts of tunnels appeared to have been made by pressure necrosis and surrounding edema, and subsequently were associated with a massive eosinophilic influx and myocytolysis. The eosinophilic abscess and multinucleated giant cells were often observed in the animals of the 30 days group. The diaphragmatic changes seemed to be repaired with or without fibrous scar formation which was occasionally seen in 45 days and later.
parasitology-helminth-trematoda ; Paragonimus westermani ; paragonimiasis ; diaphragm ; dog ; cat ; pathology ; peritonitis

A case of congenital absence of right atriovntricular (A-V) connection of heart is reported. Patient was 81 day old male infant with chief complaints of dyspnea and irritability. Clinical evaluation revealed increased pulmonary vascularity on chest x-ray, absence of right A-V connection, regurgitation of left A-V valve, right-sided ventricular hypoplasia and L-TGA. Clinical assessment of the case was tricupsid atresia with LTGA and mitral regurgitation. Pulmonary artery banlding and artial septectomy was performed. Parenteral alimentation through the femoral veins resulted in obstruction of IVC and subsequent multiorgan failure. The autopsy findings of the heart were corrected transposition of great arteries with associated anomallies of right-sided mitral atresia, Ebstein's malformation of left-sided tricuspid valve, ventricular septal defect, muscular hypertrophy of right-sided left ventricle with luminal obliteration. Long segment of IVC was completely occluded due to occlusive thrombi with fungal infection. Bilateral kidneys were infarcted and azygos vein was markedly engorged. Microscopic examination revealed candidal colonization in the inferior vena cava and septic embolzation in brain.
Infant ; Male ; Female ; Humans

A case of congenital absence of right atriovntricular (A-V) connection of heart is reported. Patient was 81 day old male infant with chief complaints of dyspnea and irritability. Clinical evaluation revealed increased pulmonary vascularity on chest x-ray, absence of right A-V connection, regurgitation of left A-V valve, right-sided ventricular hypoplasia and L-TGA. Clinical assessment of the case was tricupsid atresia with LTGA and mitral regurgitation. Pulmonary artery banlding and artial septectomy was performed. Parenteral alimentation through the femoral veins resulted in obstruction of IVC and subsequent multiorgan failure. The autopsy findings of the heart were corrected transposition of great arteries with associated anomallies of right-sided mitral atresia, Ebstein's malformation of left-sided tricuspid valve, ventricular septal defect, muscular hypertrophy of right-sided left ventricle with luminal obliteration. Long segment of IVC was completely occluded due to occlusive thrombi with fungal infection. Bilateral kidneys were infarcted and azygos vein was markedly engorged. Microscopic examination revealed candidal colonization in the inferior vena cava and septic embolzation in brain.
Infant ; Male ; Female ; Humans

Hibernoma is a rare slowly growing painless subcutaneous neoplasm, and predominates in the scapular and interscapular region, mediastinum, and upper thorax. Microscopically, hibernomas display a distinct lobular pattern and are composed of cells with varying degrees of differentiation, ranging from uniform, round to ovoid, granular eosinophilic cells to multivacuolated cells with multiple, small lipid droplets and centrally placed nuclei. We report a case of hibernoma occurred on the right scapular region in a 33-year-old man.
Adult ; Eosinophils ; Humans ; Lipoma* ; Mediastinum ; Thorax