BACKGROUND: Although immunophenotyping of leukemias has improved diagnostic accuracy and reproducibility, it has also caused diagnostic confusion regarding the lineage of leukemic cells. So far, lots of papers about acute leukemias with coexpression of another lineage markers with different technical methodologies and different criteria have been published in Korea and other countries. The authors investigated the frequency and immunophenotypic characteristics of the leukemias with aberrant lineage markers from data obtained at Korea University Hospital by a retrospective study. METHODS: From Jan. 1993 to Feb. 1996, 179 leukemias had been requested for immunophenotypig and 28 cases among them with unusual immunophenotypes were retrieved according to their immunophenotyping results. For the final diagnosis all the slides stained with Wright-Giemsa, peroxidase, Periodic-Acid Schiff, Sudan black B, and nonspecific esterase were re-examined, and all the flow cytometric results were reanalyzed. RESULTS: Among 28 cases, 3 cases(10%) were acute biphenotypic leukemias(BP) one with B lymphoid and myeloid markers and the other two with T lymphoid and myeloid markers. One case of intralineage bilinear acute leukemia(ILBL) with two separate populations of megakaryocytic cells and monocytic cells was noted. 6 cases(21%) were acute myeloblastic leukemias expressing lymphoid associated markers(Ly+AMLs; CD19) and 8 cases(28%) were myeloid antigen-positive acute lymphoblastic leukemias(My+ALLs, four with CD13+ and three with CD33+ and one with blastic transformation of chronic myelogeneous leukemia). Because of the change in diagnostic criteria, lymphocyte contamination, or low setting of negative control, 10 cases (36%) were not included to be of unusual immunophenotypes. CONCLUSIONS: Frequency of acute hybrid leukemia was 2.2 % of all leukemias. Ly+AMLs was 3.4%, and My+ALL was 4.4%. In conclusion, first, quality control of the flow cytometry and careful interpretation especially in terms of positive cut-off value and gating, are needed. Secondly, national guidelines for the criteria of the hybrid leukemia and My+ALLs and Ly+AMLs are necessary for the elucidation of the prognostic implication of those leukemias.
Carboxylesterase ; Diagnosis ; Flow Cytometry ; Immunophenotyping ; Korea ; Leukemia* ; Leukemia, Myeloid, Acute ; Lymphocytes ; Peroxidase ; Quality Control ; Retrospective Studies ; Sudan

Eight bacterial strains were examined whether they have phoP/phoQ genes which were known to be involved in the intracellular survival of Salmonella typhimurium. The phoP/phoQ operon were known to sense the stimuli of the genes involved in the adaptation of the environment. Using 514-basepairs EcoRV DNA fragment of phoP region of Salmonella typhimurium as a probe, dot blot hybridization were performed. Chromosomal DNAs of Klebsiella pneumonia, Pseudomonas aeruginosa, Serratia marscescens, Enterobacter cloacae, Salmonella typhimurium, Escherichia coli, Shigella dysenteriae, and Listeria monocytogenes were examined by DNA hybridization assay. Against our expectation, intracellular pathogen, L. monocytogenes, did not have similar DNA sequences to phoP/phoQ of S. typhimurium, while E, coli, S. dysenteriae, and E. cloacae showed the positive signal even though they were not intracellular pathogens. This result suggested that the phoP/phoQ operon was absent in intracellular pathogenic bacterias other than S. typhimurium. Rather it was found in phylogenetically closer bacterias to S. typhimurium, which were not able to survive in intracellular environment. Some different mechanism, which is not dependent on phoP/phoQ operon, could be involved in the intracellular survival of L. monocytogenes.
Bacteria* ; Base Sequence ; Cloaca ; DNA ; Enterobacter cloacae ; Escherichia coli ; Klebsiella ; Listeria monocytogenes ; Operon ; Pneumonia ; Pseudomonas aeruginosa ; Salmonella typhimurium ; Serratia ; Shigella dysenteriae

The authors studied the ultrastructural changes of liver cell mitochondria in autolysis. The male Sprague-Dawley rats, weighting 140~160 gm were sacrificed for extract liver tissue. The slices of the liver tissue were incubated in 37 degrees C aseptic normal saline, and those were examined by following intervals; 10, 20 and 30 minutes and 1, 2, 6, 12 and 24 hours with light and electron microscope. The results obtained by light microscopy were summerized as follow. Several fine intracytoplasmic vacuoles were observed 1 hour after incubation. After 3 hours, focal destruction of cytoplasmic membrane with pyknosis of nuclei were observed. More delicate intracytoplasmic architectural changes could not be detected at light microscopic studies. The cord arrangement and cellular boundaries were relatively well preserved until 24 hours after incubation. Electronmicroscopically, mild intramitochondrial swelling with diminution of intramatrical granules were observed at 20 minutes. These were the earliest findings. Both high amplitude swelling and destruction of mitochondrial membrane were observed concurrently at 1 hour after incubation. The earlier membrane changes were observed at inner membrane with cristae and followed by degeneration of the outer membrane. The intramatrical amorphous dense deposits were observed at 30 minutes when the membranes were not destroyed. These deposits were noted in the other experimental groups which were incubated longer than 30 minutes. More electron dense deposits were observed after 1 hour at that time the membrane changes appeared. Vhe results suggest in this experiment that the earliest autolytic changes of liver cell mitochondria is loss of intramitochondrial granules and the membraneous changes led to the irreversible mitochondiral injury. The appearance of two types of intramitochondrial dense deposits would be an interesting finding needed to require further investigation for the chemical stucture and mechanism of dense deposit formation.
Male ; Humans

No abstract available.
Diagnosis* ; Ossification, Heterotopic* ; Risk Factors* ; Spinal Cord Injuries* ; Spinal Cord*

No abstract available.
Evoked Potentials, Motor* ; Stroke*

PURPOSE: To determine the significance of anomalous position of the gallbladder. MATERIALS AND METHODS: Sixteen patients with anomalous position of the gallbladder were evaluated for analysis. The diagnosis was confirmed by ultrasonography(15 patients) and oral cholecystography(1patient). Among those, six patients underwent CT scan and a patient had 99mTc-DISIDA scan. The images were analysed with respect to the location of the GB and configuration and associated abnormality of the liver and hepatobiliary systems. Medical records of each patient were also reviewed. RESULTS: Among 16 patients having an anomalous position of the gallbladder, nine had retrodisplaced gallbladder, four had left-sided gallbaldder, two had suprahepatic gallbladder, and one had floating gallbladder. Except for one patient, fifteen had abnormality in the liver such as focal atrophic or hypoplastic change and liver cirrhosis. Intrahepatic stones were demonstrated in 6 patients. CONCLUSION: Our results showed that anomalous position of the gallbladder was commonly associated with atrophy or hypoplasia of the liver rather than congenital in origin. The possiblity of an anomalous location of gallbladder should be kept in mind when GB is not in its normal location.
Atrophy ; Diagnosis ; Gallbladder* ; Humans ; Liver ; Liver Cirrhosis ; Medical Records ; Technetium Tc 99m Disofenin ; Tomography, X-Ray Computed

No abstract available.
Nephrotic Syndrome* ; Venous Thrombosis*

PURPOSE: The identification of factors present at the time of initial evaluation may be important to predict the prognosis in patients with superficial bladder carcinoma. Attempts were made to identify predictive factors of recurrence and progression. MATERIALS AND METHODS: This study included twenty seven patients with superficial bladder tumor(pTa-pTl) who had no recurrence within 5 years. A comparative non-randomized study was performed of a control group of twenty six patients with same superficial bladder tumor who had recurrence within 1 year after transurethral resection of bladder tumor(TURBT) was done. Between the former and the latter patients cumulative and multivariate analyses were performed to estabilish predictive factors of pathological recurrence and progression. The resected tumors were immunohistochemically stained with anti-lamin rabbit serum to evaluate the presence or absence of basement membrane breakage, the vascular and/or lymphatic invasion, and to count number of neovascularizasion. RESULTS: In superficial bladder carcinoma, invasion of basement membrane, grade, invasion of lymphatics and vessels, and neoangiogenesis were significant factors affecting recurrence and progression, and these factors acted independently. CONCLUSIONS: These factors used to predict recurrence and progression of superficial bladder tumor were thought to be the important risk factors. These results suggested that close follow-up and aggressive treatment such as BCG instillation should be considered for the treatment of superficial bladder cancer with unfavourable prognostic factors.
Basement Membrane ; Follow-Up Studies ; Humans ; Multivariate Analysis ; Mycobacterium bovis ; Prognosis ; Recurrence* ; Risk Factors ; Urinary Bladder Neoplasms* ; Urinary Bladder*

Borderline malignant ovarian tumor are characterized as neoplasrns exhibiting cellular priliferative changes greater than those seen in the benign form, but not showing destnictive invasion of the ovarian strama. We reviewed 14 cases of borderline ovarian tumor who had been diagnosed and treated at Kyung Pook university hospital from 1987 to 1992. We nnalysed the clinical features, treatment and prognosis which were compared to 24 cases of the epithelial ovarian cancer at the same period The most common histological thpe of boderline tumnr was mucinous type (1 l cases, 79%), the next one was serous type (3 cases, 21%). In FIGO stage of Borderline tumor, 11 caseS weve stage I a, 1 with stage II c, 1 with stage gb and 1 with stage lV, and the FIGO stage of 24 cases of ovarian cancer was 8 cases with stage I a, 1 with stage I b, 2 with stage I c, 1 with II c, 2 with stage III a, 1 with stage III b, 7 with stage III c and 2 with stage 1V. The mean age of borderline and malignant tumor was 37.1 and 47.6 years.. 3 cases were being pregnant on the operatian. In the 14 cases of borderline turnor, 7 cases were managed by conservative operation, but 1 case recurred 4 years later so extirpative operation and pastoperative chemotherapy were given. The other 4 cases were managed by extirpative operation but postoperative chemotherapy was given in only 1 patient. Follow up ranged from 7 to 72 months. 12 cases were alive. 2 cases died, one was stage III b, the other was atage IV. This atudy suggeat, that it is neceasary to follow up carefully even the early stage of botderline tumor and manage as oyarian carcinama in the advanced stage.
Drug Therapy ; Female ; Follow-Up Studies ; Humans ; Mucins ; Ovarian Neoplasms ; Ovary* ; Prognosis

PURPOSE: Spiculation pathologically correlated with irregular fibrosis, localized lymphatic spread of tumor, or an infiltrative growth pattern of tumor, and the spiculation was Observed in malignant mass. But the spiculation was also observed in benign mass, particularly in tuberculoma. We retrospectively reviewed the length of spiculation under the hypothesis that the length of spiculation could be one of differential diagnostic points between lung cancer and tuberculoma. MATERIALS AND METHODS: We studied thirty seven patients (27 men and 10 women) ranging in age from 35 to 80 years (mean, 60 years). Analysis of spiculation included (a) the number of spicules (b) the mean length of spicules (c) the mean length of the longest spicule (d) the percentage of the mean length of spicules to the longest diameter of mass (e) the percentage of the mean length of spicules to the shortest dia, meter of mass. RESULTS: The mean length of spicules of tuberculoma was 13.8 mm (S. D. 6.7) and that of lung cancer was 5.7 mm (S. D. 3.5). The percentage of the mean length of spicules to the longest diameter of tuberculoma was 63.6% and that of lung cancer was 13.7%. The percentage of the mean length of spicules to the shortest diameter of tuberculoma was 90.4% and that of lung cancer w~s 18.3%. CONCLUSION: It is hard to differentiate lung cancer from tuberculoma on the basis of the spiculation being present or not, but we suggest that the longer spiculation be more highly suggestive of tuberculoma rather than lung cancer. The length of spiculation may help us differentiate lung cancer from tuberculoma.
Fibrosis ; Humans ; Lung Neoplasms ; Lung* ; Male ; Retrospective Studies ; Tuberculoma*