Eccrine spiradenomas are clinically characterized by a solitary, tender mass and they are situated on the upper parts of the body, predominantly on the ventral aspect. We herein report two cases of eccrine spiradenoma in 35-year-old man and 53-year-old woman, which located on upper extremity and inguinal region. The masses are round, well circumscribed and measuring 0.7x0.5x0.5 cm, 5x4.5x3 cm in size, respectively. Histopathologically, the tumor consists of masses of two types of cells, intensely staining cells and pale staining cells, usually arranged in chains, cords and pseudoglands. Immunostainings for low molecular cytokeratin, high molecular cytokeratin, carcinoembryonic antigen, and S-100 protein show positivity in neoplastic cells. Electron microscopically, the tumor was composed of three types of cells, i. e. 1) round or ovoid tumor cells in shape with scanty cytoplasm and poorly developed intracytoplasmic orgenelles, 2) spindle shaped dark cells interconnected by desmosomes, 3) large epithelial cells with abundant cytoplasm and cytoplasmic intermediate filaments which formed glandular structures. The large epithelial cells joint each other by desmosomal attachments and luminal cells featured small numbers of microvilli, but either secretory granules nor ductal type granules were noticed.
Female ; Male ; Humans

We report a case of dedifferentiated liposarcoma of retroperitoneum as a recurrent form in a 41 year old male. The patient received a extirpation for retroperitoneal mass and diagnosed as myxoid liosarcoma 4 years ago. The patient experienced 3 recurrences over a period of 4 years and diagnosed as myxoid liposarcoma in the second, third recurrence also. Histologically, the mass was composed of several clearly distinct elements : well differentiated liposarcoma, myxoid liposarcoma, myxoid malignant fibrous histiocytoma, poorly differntiated sarcoma, and fibrosarcoma. Immunohistochemically, S-100 protein was expressed in the area of spindle cell sarcoma, well differentiated liposarcoma, and malignant fibrous histiocytoma but alpha-1-antichymotrypsin was only expressed in the area of myxoid malignant fibrous histiocytoma.

In the present study, immunohistochemical detection of p53 oncoprotein was performed to determine whether the grade of differentiation and the histologic type of gastric adenocarcinoma, and the degree of atypia accompanied with adenoma can be related to p53 mutation. Paraffin sections of 22 gastric adenomas and 56 gastric adenocarcinomas were examined for the overexpression of p53 oncoprotein with the avidin-biotin peroxidase complex staining procedure. The obtained results were as follows; 1. All the 22 cases of adenomas and 16 cases of well differentated adenocarcinomas showed uniformly negative staining. 2.Seven of 18 cases of moderately differentiated adenocarcinomas(39%), and five of 30 cases of poorly differentiated adenocarcinomas(17%) exhibited p53 protein expression. 3. Three of 29 cases of diffuse type (10%) and 9 of 19 cases of intestinal type(47%) exhibited p53 protein expression. These results suggest that p53 mutation is important in carcinogenesis of the intestinal type of gastric adenocarcinoma, and there is no correlation between the differentiation of gastric adenocarcinoma and the degree of p53 oncoprotein overexpression.
Adenocarcinoma ; Adenoma

Occurrence of a retroperitoneal duplication cyst associated with a heterotopic pancreas is rare. We report a case of a retroperitoneal duplication cyst associated with a heterotopic pancreas. A 35-year-old male was admitted, presenting with back pain. A pelvic computed tomographic scan disclosed a 10 cm-sized cystic mass filling the lower pelvis and displacing the rectosigmoid colon anteriorly. Histologically, the cyst wall was lined partly by mucin-secreting columnar epithelium, showing atypical hyperplasia and partly by a gastric fundic-type and a colonic-like mucosa. Beneath the epithelium, organized bundles of smooth muscle were arranged in two layers analogous to smooth muscles layers of the bowel and a small piece of pancreatic tissue were present in the smooth muscle wall of the cyst.
Adult ; Back Pain ; Colon ; Epithelium ; Humans ; Hyperplasia ; Male ; Mucous Membrane ; Muscle, Smooth ; Pancreas* ; Pelvis

BACKGROUND/AIMS: This study was aimed to examine if FB1 induced-hepatotoxicity involves apoptosis, and cholesteryl hemisuccinate (CS) pre-treatment would selectively interfere with FB1 induced-apoptosis of hepatocytes. METHODS: Sprague-Dawley rats were intravenousely injected with FB1 (1.25 mg/kg/day) for two days, and were sacrificed at 3, 6, 12, 24 and 48 hours after injection. Another experiment group was composed of rats with pretreatment of CS (100 mg/kg/day, i.p.) before FB1 injection. RESULTS: This study demonstrated that administration of hepatotoxic dose of FB1 to Sprague-Dawley rats resulted in liver injury leading to cell death by apoptosis. FB1-induced apoptosis was preceded by early elevation in serum alanine aminotransferase (ALT), aspartate aminotransferase (AST), total cholesterol, and appearance of injured pre-apoptotic cells at 12 hours was followed by massive fragmentation and margination of heterochromatin at 24 hours. CS pre-treatment prior to FB1 injection ameliorated serum biochemistry and hepatic injury with apoptosis, demonstrated by histological, ultrastructural and TUNEL (terminal deoxyribonucleotidyl transferase-mediated dUTP-digoxigenin nick end labeling) methods. In addition, there was remarkable decrease in number of PCNA (proliferative cell nuclear antigen)-positive proliferating hepatocytes compared to that of FB1 treated group. CONCLUSION: This study suggests that apoptosis significantly contributes to FB1-induced hepatotoxicity in vivo, and pre-exposure of rat to CS prevents FB1-induced hepatic apoptosis and proliferation.
Alanine Transaminase ; Animals ; Apoptosis* ; Aspartate Aminotransferases ; Biochemistry ; Cell Death ; Cholesterol ; Hepatocytes* ; Heterochromatin ; In Situ Nick-End Labeling ; Liver* ; Proliferating Cell Nuclear Antigen ; Rats* ; Rats, Sprague-Dawley

For the estimation of the proliferative activity, related to the biologic behaviour, malignant potential, and prognosis, of human thyroid tumors, PCNA(proliferating cell nuclear antigen) immunohistochemical staining was performed on paraffin-embedded sections of 9 normal thyroid tissues, 9 adenomatous goiters, 9 follicular adenomas, 4 Hurthle cell tumors, 12 papillary carcinomas, 4 follicular carcinomas, and 3 anaplastic carcinomas. The results were as follows: 1) The PCNA labeling indices in adenomatous goiter, follicular adenoma, and Hurthle cell tumor were 1.1, 1.5, and 2.4, respectively. They were significantly higher than the labeling index in normal thyroid. 2) The PCNA labeling indices in papillary carcinoma and follicular carcinoma were 3.5 and 4.4, respectively. They were significantly higher than the labeling indices in adenomatous goiter and follicular adenoma, but there was no significant difference between papillary and follicular carcinoma. 3) The PCNA labeling index in anaplastic carcinoma, 14.1, was significantly higher than those in benign and other malignant tumors. According to the results, the PCNA labeling index was well correlated with the malignant potential of a tumor. So the PCNA immunohistochemical staining is thought to be a useful method for the evaluation of the malignant potential and prognosis of a tumor.
Humans

Histologic, immunohistochemical and ultrastructural studies were performed on 6 cases of undifferentiated thyroid carcinoma to study the histogenesis of the undifferentiated thyroid carcinoma, to determine the most useful markers for diagnosing these tumors and to investigate the nature of osteoclast-like giant cells rarely observed in these tumors. For the immuno-histochemical study, a panel of antibodies to epithelial (cocktailed keratin, low molecular weight keratin, CEA), mesenchymal(vimentin, desmin, actin, FVIIIRAg) endocrine(calcitonin, chromogranin), lymphocytic(LCA), histiocytic(alpha-l-ACT, alpha-1-AT, lysozyme, CD68), and Schwann cell(S-100 protein) markers were used. The following results were obtained; 1) Well differentiated carcinoma was associated with 2 cases of spindle cell type and 1 case of giant cell type of undifferentiated thyroid carcinoma and a transitional zone between the well differentiated and undifferentiated lesions was observed. 2) All of the examined cases expressed keratin, and 3 tumors expressed CEA. 3) All the mesenchymal markers, LCA, S-100 protein, calcitonin, and chromogranin were not expressed. Vimentin was coexpressed with keratin in 4 cases. 4) Osteoclast-like giant cells were observed in 1 case of spindle cell type. They expressed CD68 but not keratin. 5) Ultrastructural study revealed the desmosomes between the tumor cells and non-neoplastic, follicular, thyroid epithelial cells. The above results indicate that undifferentiated thyroid carcinoma originates from follicular epithelial cell, keratin is the most useful marker for diagnosis of this tumor, and the osteoclast-like giant cells are histiocytic in nature and reactive, rather than neoplastic.

Extraskeletal mesenchymal chondrosarcoma is a relatively rare tumor and its cytologic findings have rarely been reported. We experienced a case of mesenchymal chondrosarcoma of soft tissue of the right lateral neck diagnosed by fine needle aspiration biopsy in a 59 year-old man. Cytologic findings showed two cell components. One was an undifferentiated, small cell component with moderate amount of cytoplasm and spindle nuclei. The second population was a chondroid component. These cytologic findings were diagnostic to mesenchymal chondrosarcoma.
Biopsy ; Biopsy, Fine-Needle* ; Cellular Structures ; Chondrocytes ; Chondrosarcoma, Mesenchymal* ; Cytoplasm ; Humans ; Middle Aged ; Neck

Fine needle aspiration(FNA) biopsy has become the procedure of choice for initial diagnosis of adrenal masses. However, there have been relatively few reports discussing the FNA cytologic features of adrenal cortical carcinoma. Recently, we experienced a case of FNA cytology of bilateral adrenal cortical carcinoma in a 61-year old man. The smear revealed loosely cohesive pleomorphic tumor cells with hemorrhagic and necrotic background. The tumor cells showed oval to spindle hyperchromatic nuclei and prominent nucleoli with frequent mitotic figures. The cytoplasm of tumor cells was relatively abundant and sometimes vacuolated. These cytologic findings were interpreted as an adrenal cortical carcinoma, undifferentiated pattern.
Adrenocortical Carcinoma* ; Biopsy ; Biopsy, Fine-Needle* ; Cytoplasm ; Diagnosis ; Humans ; Middle Aged ; Needles

A case of left parietal pleomorphic xanthoastrocytoma that occurred in a 58-year-old woman is reported clinicopathologically. Histopathologic diagnosis of pleomorphic xanthoastrocytoma was made because of the unique pleomorphic histologic features, positive glial fibrillary acidic protein in immunohistochemical staining. The flow cytometric analysis reveals DNA aneuploidy and relatively high S-phase fraction. The pleomorphic xanthoastrocytoma is considered as a special subgroup of glioma on the basis of superficial cortical location, GFAP expression, marked cellular atypia, xanthomatous cells, and relatively favorable prognosis.
Female ; Humans