In order to study the histogenesis of gastric carcinoma, and to find the correlationship between the gastric carcinoma and endocrine tumor of digestive tract, we performed immunoperoxidase staining for serotonin, somatostatin and gastrin respectively in the 34 cases of surgically resected gastric carcinoma. The results were as follows; 1) Endocrine cells were found in 26.5% (9/34) of the gastric adenocarcinoma, but in 58.6% (17/29) in the normal gastric mucosa near the cancer area. The occurrence of endocrine cells was less frequent in cancer than in the normal gastric mucosa. 2) Among the 15 cases of intestinal type adenocarcinoma, serotonin-positive cells were found in 2 cases, somatostatin-positive cells in 1 case and gastrin-positive cells in 1 case. Among 16 cases of diffuse type adenocarcinoma, gastrin-positive cells were found in 2 cases, and somatostatin-positive cells were found in 2 cases. 3) We concluded that, the endocrine cells are more frequently observed in the well differentiated gastric carcinoma than poorly differentiated carcinoma tissue. In summary, gastric carcinomas are supposed to arise from the totipotent stem cells of endoderm origin, and they have multidirectional property of differentiation into both endocrine and nonendocrine cells. Most of them differentiate into nonendocrine cells and only a few of them differentiate into endocrine cells.

This study was designed for the evaluation of the mean proportions and range of individual difference of muscle fiber types in human Gastrocneminus, Soleus, Peroneus longus and Tibialis anterior muscles, respectively. Flash-frozen muscle sections obtained from 15 cadavers were stained for H&E, trichrome, PAS, regular & reversed myosin ATPase, succinic dehydrogenase (SDH), acid phosphatase (Ac-Pase) and alkaline phosphatase (Alk-Pase). The results obtained were as follows. 1) Differentiation of muscle fiber types was not evident in H&E and trichrome stained specimen. Three types of muscle fibers were, however, evident in PAS-stained sections according to the degree of positivity in observed skeletal muscles. 2) Two fiber types (Types I and II) were only differentiated and the predominant muscle fiber type was type I by regular myosin ATPase reaction in Gastrocnemius, Soleus, Peroneus longus and Tibialis anterior muscles. 3) Three muscle fiber types (Type I, IIa and IIb) were, however, differentiated and the predominant muscle fiber type was type IIa, contrary to patterns of regular myosin ATPase in skeletal muscles except for Soleus muscle by reversed myosin ATPase stains. Only two muscle fiber types (Type I and II) and predominant type I fibers were shown in Soleus muscle. 4) SDH stains showed three types of muscle fiber except Soleus muscle. The mean proportions(%) of type 1 fibers were 48.0% in Gastrocnemius, 62.3% in Soleus, 40.8% in Peroneus longus, and 39.8% in Tibialis anterior muscles, respectively. 5) The mean proportions (%) of muscle fiber types in human skeletal muscles were markedly different, according to individuals and various enzyme histochemical stains. 6) The size of muscle fibers was relatevely small in type I fibers compared with type IIb. 7) Evaluation for the combination patterns of various enzyme histochemical activities showed that the common muscle fiber types (Type I, IIa and IIb) were markedly reduced in the mean proportions and unusual rare muscle fibers predominant. This predominance of unusual muscle fiber types and marked discrepancy in muscle fiber types between regular and reversed myosin ATPase seemed to be ascribed to decreased muscle enzyme activities following postmortem period.
Humans

We have investigated an immunohistochemical expression of the Human-Ha-ras oncogene product p21 in tumor cells of the primary mass and metastatic lymph nodes with different histological features of gastric cancer by using avidinbiotin complex immunoperoxidase method in formalin-fixed tissue sections from 73 cases of primary tumor mass and 23 cases of metastatic lymph node. Histologic type of the gastric cancer was classification. The results obtained were as follows: 1) Expression of Ha-ras p21 was consistantly increased in the well differentiated tubular adenocarcinoma as compared with poorly differentiated tubular adenocarcinoma (p<0.01), and was substantially decreased in mucinous carcinoma and signet ring cell carcinoma. 2) Signet ring cell carcinoma showed that positive immunoperoxidase reaction for Ha-ras p21 exhibited in the majority of immature signet ring cell with scant cytoplasm rather than in the mature signet ring cells which have abundant cytoplasm filled with mucin. This findings indicate that mucin production from the tumor cell was not correlated with activation of ras gene in the tumor tissue of gastric carcinoma. 3) In general Ha-ras p21 expression was enhanced in the metastatic tumor cells of the regional lymph node compared with primary tumor, especially it was consistantly increase in the well differentiated tubular adenocarcinoma.
Humans ; Adenocarcinoma ; Neoplasm Metastasis ; Stomach Neoplasms

The increased susceptibility in patients of chronic renal failure to infection has been reported to be attributed to defects in granulocyte and lymphocyte function and proliferative activity of hematopoietic cells. The definite cause of the frequent infection in uremic patients, however, is still controversial. The effect of uremic plasma on the aspect of the hematopoietic cells has been scarcely been studied. In the present study, mouse bone marrow was cultured with uremic plasma, to evaluate the effect of uremic plasma on the proliferative activity and morphological features of CFU-GM. The results obtained were as follows. 1) The number of colonies in group co-cultured with uremic plasma was more reduced than that of normal plasma group. 2) There was no difference between the group cultured with predialytic uremic plasma and that of postdialytic plasma in number of colonies, macroclusters and microclusters. 3) The forms of colony were granulocytic and monocytic forms at 5 day of culture. Electron microscopically, granulocytes disclosed electron dense azurophilic granules and electrolucent specific granules in the cytoplasm, and monocyte showed numerous vesicles and vacuoles in the cytoplasm which had finger-like projections. 4) The molecular weight of inhibitory factor in the uremic plasma was supposed to be less than 50,000 daltons.
Mice ; Animals

The experiment was designed to investigate type-selectivity of the involved muscle fibers and changes in the component ratios of the fiber types following the progression of disuse atrophy in the skeletal muscle. After inducing disuse atrophy of the skeletal muscle by applying cast on the hind limb, we used histological and histochemical stains in the sections of the rat Tibialia anterior muscles. The results were as follows. 1. Even 8 weeks after immobilization of the hind limb, differentiation of muscle fiber types by histolo gical and histochemical staining methods in the Tibialis anterior muscle could be possible. 2. Atrophy of muscle fibers was more pronounced in type IIB and type I fibers than in type IIA fibers. 3. Central migration of sarcolemmal nuclei and ring fiber appeared after 6th and 8th weeks of immobilization respectively, in the H&E and trichrome preparations. Ac-pase or Alk-pase positive fibem were not noted throughout the experimental periods.
Animals ; Atrophy ; Coloring Agents ; Extremities ; Immobilization ; Muscle, Skeletal ; Muscles ; Muscular Disorders, Atrophic ; Rats

An immunohistochemistry for S-100 protein by biotin avidin system technique was done to evaluate the existence and distribution pattern of S-100 protein positive cells in various obtained were as follows. 1) Positive immunostaining for S-100 protein was observed in myoepithelial cell, serous acinar cell and nervous bundle in normal salivary gland. 2) Strong immunoreactivity for S-100 protein was shown in plemorphic adenoma, which was localized not only in myoepithelial cord or sheets of epithelial portion but also in chondrocytes, stellate cells of myxoid stroma and in squamous keratin pearl of mesenchymal metaplastic foci. 3) The S-100 protein was demonstrated in the tumor cells of tubular adenoma, acinic cell tumors and in epidermoid area of mucoepidermoid tumors. 4) Immunoreactivity for S-100 protein, however, was not found in the tumor cells of adenoid cystic carcinoma and adenolymphoma except for stroma reticulum cells. 5) Intensity of positive reaction for S-100 protein varied from cell to cell: Some had intense immunoreactivity, whreas others were only weakly positive or completely negative, even in myoepithelial cell nest of the same pleomorphic adenoma.

We performed 75 cases of daryocystorhinostomy from Jan. 1988 to Dec. 1990. A routine dacryocystography was performed prior to operation in all cases. A modified T oti's method was applied as a surgical technique "H" shaped incision was done. Both anterior and posterior flaps were sutured adequately and vaseline guaze was used as a plugging agent for 7 to 10 days Success was achieved in 72(96.0%) of 75 cases. The causes of 3-failures were organized granulation tissue and trauma.

The ultrastructural changes of the chorioretina following the intravitreal injection of ornithine in rabbit eyes at 1,2,4,8 week time intervals were investigated employing electron microscopy in this animal experiment. 1. 1 week after injection, swelling of the mitochondria in the cytoplasm of the pigment epithelium was seen. 2. 2 weeks after injection, phagosomes and phagolysosomes were present in the cytoplasm of the pigment epithelium and nerve elements in the inner nuclear layer disappeared and were replaced by Muller cell. 3. 4 weeks after injection, stroma of the choroid was atrophied and abundant melanocytes were aggregated, and papillary formed pigment epithelium with detachment of the retina was seen. 4. 8 weeks after injection, stromal atrophy and attenuated choriocapillaries of the choroid were present, and proliferation of the microvilli of the pigment epithelium after detachment of the retina was seen. 5. In summary intravitreal injection of ornithine in rabbits initially caused marked changes in the pigment epithelium with subsequent degeneration of the choroid and sensory retina.
Animal Experimentation ; Atrophy ; Choroid ; Cytoplasm ; Epithelium ; Intravitreal Injections ; Melanocytes ; Microscopy, Electron ; Microvilli ; Mitochondria ; Ornithine* ; Phagosomes ; Rabbits ; Retina

The pulmonary cytology has reached a high level of accuracy. By the examination of the sputum and/or bronchial brushings, it is now possible to make a diagnosis in 70% to 90% of patients with cancer. Primary melanoma of the lung is very rare and there have been reported about 20 cases in the world literature. We present a case of primary malignant melanoma of the lung in a 61-year-old male diagnosed by cytologic examination of sputum, bronchial brushing and aspirated pleural fluid. Histologic examination of bronchoscopic biopsy and examination of the skin and other primary sites confirmed the diagnosis.
Male ; Humans ; Biopsy

Although febrile convulsion (FC) is a common clinical entity with a high recurrence rate, no specific factors have been identified to be highly predictive of its recurrence. A total of 114 cases of FC identified during a 28 month period (January, 1989-May, 1991) was analysed. A slight predominance of boys over girls (1.3 to 1.0) was observed. the majority of cases (89.4%) were under 3 years of age and the most common age range for the onset of FC was 1~2 years. The most common form of FC was tonic type (54.0%), followed by tonic-clonic (32.5%), clonic (5.3%), and complex partial type (5.3%). Most FC episodes lasted less than 5 minutes (81.6%), and common clinical diagnosis underlying FC were as follows: pharyngotonsillitis (64.0%), bronchitis and/or pneumonia(16.7%), and gastroenteritis (9.7%). The family history for seizure disorder was present in 27.2% of the cases: FC in 21.1%, epiepsy in 4.4%, and both in 1.8%. Among 78 cases of the first FC, 43 cases were followed for 5 to 29 months without prophylactic anticonvulsant therapy. The overall recurrence rate of FC in this group was 67.4% and the highest incidence was observed in patients less than one year old (86.7%). A higher recurrence rate (80%) was observed in patients whose body temperature was lower than 39degrees C, as opposed to higher than 39degrees C (50%). It is concluded that the recurrence of FC is positively correlated with factors such as younger age (less than one year old), and lower body temperature at the time of onset of FC.
Body Temperature ; Bronchitis ; Diagnosis ; Epilepsy ; Female ; Gastroenteritis ; Humans ; Incidence ; Recurrence ; Seizures, Febrile*