muramidase and Adenocarcinoma--Mucinous

Mucinous-type adenocarcinoma and non-mucinous-type adenocarcinoma are known to be the representative histological subtypes of bronchioloalveolar carcinoma. Mucinous-type adenocarcinoma is also known to carry abnormalities of the K- ras gene at high frequency. However, the mixed subtype of the both mucinous-type and non-mucinous-type adenocarcinoma (mixed-type) has not been analyzed in detail, although its existence has been reported in a few papers. In this study we carried out immunohistochemical and molecular biological analyses of 15 examples of the mixed-type, in comparison with 11 cases of mucinous-type and 21 cases of non-mucinous-type adenocarcinoma. Immunohistochemically, lysozyme - one of the specific markers of mucinous-type adenocarcinoma - was not stained in the mucinous component of the mixed-type. K- ras gene mutations were detected only in mucinous-type (73%) and non-mucinous-type (10%) adenocarcinomas and not in either the mucinous or non-mucinous component of the mixed-type (0%). Therefore, although mixed-type adenocarcinomas consist of tumor cells showing both mucinous and non-mucinous morphology, the mucinous component of this type differs from mucinous-type adenocarcinoma in terms of immunohistochemical features and K- ras gene alteration.

Topics: Adenocarcinoma, Mucinous; Aged; Aged, 80 and over; Female; Genes, ras; Humans; Immunohistochemistry; Lung Neoplasms; Male; Middle Aged; Muramidase; Mutation

Adenoma malignum of the uterine cervix (mucinous type of minimal deviation adenocarcinoma, mucinous MDA), is a unique neoplasm that is difficult to diagnose owing to the deceptively benign appearance of the tumour cells. The present study was undertaken to explore the phenotypic expression of this tumour compared with those of non-neoplastic cervical tissues and of cervical carcinomas of various types. Ten cases of mucinous MDA, 50 cases with non-neoplastic cervical tissues, 13 of cervical adenocarcinoma including the mucinous (endocervical or intestinal type) and endometrioid types, and 2 of mucoepidermoid carcinoma were examined by various histochemical staining methods, including those for gastric mucins, pepsinogen, lysozyme, chromogranin A and carcinoembryonic antigen. The results revealed that mucinous MDA characteristically exhibited gastric phenotypes. The presence of gastric metaplasia was also demonstrated in 9 cases of mucinous MDA and in 5 of the other cases examined. The 7 endocervical-type adenocarcinomas also included 4 that expressed gastric phenotypes, and 2 of the 3 intestinal-type adenocarcinomas showed the same properties focally. These results indicate the presence of a group of lesions expressing gastric phenotypes in the uterine cervix and suggest a close relationship between these lesions. Cervical adenocarcinomas expressing gastric phenotypes are probably derived from MDA.

Topics: Adenocarcinoma, Mucinous; Adolescent; Adult; Chromogranin A; Chromogranins; Female; Histocytochemistry; Humans; Metaplasia; Middle Aged; Mucins; Muramidase; Neuraminic Acids; Pepsinogens; Stomach; Uterine Cervical Neoplasms

We investigated immunohistochemically the localization of lysozyme and Leu M1 in normal skin, 76 cases of benign sweat gland tumors, 28 cases of malignant sweat gland tumors, 23 cases of extramammary Paget's disease, 7 cases of sebaceous carcinoma, 6 cases of malignant trichilemmoma, 10 cases of squamous cell carcinoma, and 10 cases of basal cell carcinoma and compared the results with those for gross cystic disease fluid protein (GCDFP)-15 to assess the sensitivity and specificity of our assay conditions for apocrine differentiation. Normal apocrine glands were stained with all three antibodies, while eccrine glands were positive only for GCDFP-15, and other portions of normal skin were not stained with any of the antibodies used. In neoplastic tissue thought to be from apocrine tumors, antibodies raised against lysozyme and GCDFP-15 had a greater specificity (100%) for apocrine differentiation, while Leu M1 had a greater sensitivity (88%). Tissues that were stained with two or three of these antibodies appeared to exhibit apocrine differentiation. In the tumors examined, the specificity for apocrine differentiation was 100% and the sensitivity for such differentiation was 92% by these criteria. According to these criteria, some cases of syringocystadenoma papilliferum, primary mucinous carcinoma of the skin, and extramammary Paget's disease with underlying adenocarcinoma showed apocrine differentiation.

Topics: Adenocarcinoma; Adenocarcinoma, Mucinous; Adenocarcinoma, Sebaceous; Adenoma, Sweat Gland; Adolescent; Adult; Aged; Apocrine Glands; Apolipoproteins; Apolipoproteins D; Biomarkers, Tumor; Carcinoma, Basal Cell; Carcinoma, Squamous Cell; Carrier Proteins; Cell Differentiation; Eccrine Glands; Female; Glycoproteins; Humans; Immunohistochemistry; Lewis X Antigen; Male; Membrane Transport Proteins; Muramidase; Neoplasm Proteins; Neoplasms, Basal Cell; Paget Disease, Extramammary; Sensitivity and Specificity; Skin; Skin Neoplasms; Sweat Gland Neoplasms

Statistics from a 64 case study showed that mucinous adenocarcinoma was apt to invade the intestinal wall and to metastasize to lymph nodes (P < 0.05). The activity of arylsulfatase and lysozyme of mucinous adenocarcinoma was stronger than that of the papillary and tubular adenocarcinoma (P < 0.05). In RR staining for electron microscopic observation, a significant decrease of proteoglycan granules was found in the surrounding matrix of mucinous adenocarcinoma, which correlated with the amount of arylsulfatase and lysozyme secreted by mucinous adenocarcinoma. These enzymes reduced the degree of sulfation in heparan sulfate and degraded proteoglycans. The proteoglycan structural barrier having been destroyed, facilitates mucinous adenocarcinoma to infiltrate and metastasize.

Topics: Adenocarcinoma; Adenocarcinoma, Mucinous; Adenocarcinoma, Papillary; Arylsulfatases; Colorectal Neoplasms; Humans; Lymphatic Metastasis; Muramidase; Neoplasm Invasiveness; Proteoglycans

One hundred and twenty-eight cases of gastric carcinoma were examined with immunohistochemical technic for carcinoembryonic antigen (CEA), human chorionic gonadotropin (HCG), serotonin, gastrin and lysozyme. CEA were observed in 105 cases. Twenty-four cases were positive for HCG, 53 cases for serotonin, 31 cases for gastrin, 89 cases for lysozyme. Sixty-nine cases exhibited more than two hormones or one hormone and lysozyme simultaneously in different cells of the same tumor. Ultrastructurally, sometimes three types of secretory granules were noticed. The electron dense granules in the lysozyme-containing tumor cells were similar to those of Paneth's cells in intestinal metaplasia. The positive rates of the above three hormones, lysozyme and multi-marker expression in diffuse type carcinoma were higher than those in intestinal type, and 42/44 cases of the diffuse type carcinoma were histologically undifferentiated carcinomas or signet-ring cell carcinomas. Lymph node metastasis occurred more frequently in those carcinomas with hormone or lysozyme positivity. These findings suggest that these neoplastic endocrine cells and Paneth's cells have originated from multipotential differentiation of neoplastic stem cells in the stomach, reflecting the state of the gene activity in the tumor cells.

Topics: Adenocarcinoma; Adenocarcinoma, Mucinous; Carcinoembryonic Antigen; Carcinoma; Chorionic Gonadotropin; Gastrins; Humans; Immunohistochemistry; Lymphatic Metastasis; Muramidase; Neoplasm Staging; Serotonin; Stomach Neoplasms

Topics: Adenocarcinoma, Mucinous; Epithelium; Gastric Mucosa; Humans; Immunohistochemistry; Male; Microscopy, Electron; Middle Aged; Muramidase; Stomach; Stomach Neoplasms

A total of 89 gallbladders with various conditions were examined histologically and immunohistochemically to detect various kinds of metaplastic changes. The gallbladder mucosa of the fetus and normal gallbladder showed no metaplastic changes. In 32 cases of chronic cholecystitis, metaplastic changes, such as mucous gland metaplasia (23 cases), Paneth's cells (six cases), and goblet cells (four cases) were observed. All cases containing Paneth's cells or goblet cells showed simultaneous lysozyme immunoreactivity and also contained argyrophilic cells. Among 23 cases with mucous gland metaplasia, 15 cases showed lysozyme immunoreactivity, eight contained argyrophilic cells, and 16 showed lysozyme immunoreactivity and/or argyrophilic reaction. The other seven cases showed only mucous gland metaplasia without endocrine cells or lysozyme immunoreactivity. These results suggest that the presence of lysozyme and/or endocrine cells is a conventional marker of gastrointestinal metaplasia of the gallbladder mucosa. Using these markers, 14 (28.6%) of 49 cases of adenocarcinoma of the gallbladder contained endocrine cells; 18 (36.7%) showed lysozyme immunoreactivity; and 25 (51.0%) contained at least one marker of endocrine cells or lysozyme immunoreactivity. These results suggest that at least half of adenocarcinomas of the gallbladder might be derived from metaplastic changes.

Topics: Adenocarcinoma; Adenocarcinoma, Mucinous; Adolescent; Adult; Argyria; Child; Child, Preschool; Cholecystitis; Cholelithiasis; Fetus; Gallbladder; Gallbladder Neoplasms; Histocytochemistry; Humans; Immunoenzyme Techniques; Infant; Metaplasia; Muramidase; Precancerous Conditions; Serotonin; Staining and Labeling

Topics: Adenocarcinoma, Mucinous; alpha 1-Antitrypsin; Colonic Neoplasms; Humans; Muramidase; Rectal Neoplasms

Topics: Adenocarcinoma, Mucinous; Animals; Arginine; Blood Coagulation; Blood Coagulation Tests; Brain Chemistry; Bronchi; Chemical Precipitation; Disseminated Intravascular Coagulation; Esterases; Factor V Deficiency; Factor VII; Factor VII Deficiency; Factor X; Fibrinogen; Hemophilia B; Humans; Hypoprothrombinemias; Kaolin; Mucins; Mucus; Muramidase; Phospholipids; Prothrombin; Rabbits; Thromboplastin; Time Factors; Venoms