No abstract available.
DNA*

Primary tumors of the adrenal cortex are comparatively rare. In the medical literature they are most frequently reported as single case. Because of their infrequent occurence some features of their clinical behavior and pathologic anatomy are not widely known. For this reason the recording of the 7 cases from the Department of Pathology, School of Medicine, Chungnam National University is thought to be worth while. Of the seven tumors, five were associated with primary aldosteronism, one Cushing's syndrome, and the remaing one virilizing syndrome. All were benign. Females were affected more frequently than males. Adrenocortical adenomas tend to be small, weighing less than 42 gm. The tumors associated with primary aldosteronism were composed of zona fasciculata-like cells and "hybrid" cells. The tumor with Cushing's syndrome consisted of zona reticularis-like cells. The tumor with virilizing syndrome consisted of zone reticularis-like cells.
Female ; Humans ; Adenoma

Pulmonary lymphangiomyomatosis is a rare disease of haphazard overproliferation of smooth muscle from perilymphatics, peribronchial and perivascular regions of the lung that leads to chylous effusion, hemoptysis, spontaneous pneumothorax and pulmonary insufficiency. The disease only affects women of child-bearing age. There is presently no successful therapy and most of the patients die within 10 years of diagnosis. We experienced a case of pulmonary lymphangiomyomatosis in a 30-year-old woman who had suffered from three episodes of spontaneous pneumothorax for 4 years. Open lung biopsy was performed. Microscopically, abnormal excess proliferation of smooth muscle tissue was identified in the wall of perivascular lymphatic channels as well as around small bronchi, and more distal air spaces. Varying sized cytic spaces Iined by cuboidal cells were also present. Tamoxifen, given if February 1991, did not influence the course of her disease. She died of respiratory failure at age of 31 in April 1991.
Female ; Humans ; Biopsy

No abstract available.
Colon* ; Fibromatosis, Aggressive*

Nuclear DNA content in 31 cases of thyroid neoplasm was determined by flow cytometry with the use of paraffin-embedded archival tissue. DNA aneuploidy was found in 6 cases (19.4%) of the 31 thyroid neoplasms; such as 2 of 8 (DI=1.16, 1.56) follicular adenomas, 1 of 6 (DI=1.10) follicular carcinomas, 1 of 15 (DI=1.18) papillary carcinomas and 2 of 2 (DI=1.76, 2.07) medullary carcinomas. The remaining tumors were diploid. No significant difference between follicular adenomas and carcinomas was detected with respect to the S phase fraction(SPF). In the papillary carcinoma group the SPF was higher than in the follicular neoplasm group, but it was statistically insignificant. Regional lymph node metastasis was present in 8 of 15( 53.3%) papillary carcinomas but absent in all of the 14 follicular neoplasms. In the medullary carcinoma group one case showed regional node metastasis at the time of resection and the other developed metastasis 11 months after surgical removal of the primary lesion. In this study tumors predominantly composed of Hurthle cells were found to have a significantly higher D.I. than those with few or no Hurthle cells. No significant difference was found between tumors with metastasis and those without metastasis.
Adenoma ; Neoplasm Metastasis

Benign hemangioma of the mediastinum is rare. This slowly growing tumor is described as well circumscribed, cystic, hemorrhagic tumor. Histologically it can be differentiated into capillary or cavernous form. We present a case of mediastinal hemangioma. A 20-year-old-man was presented with a slowly growing posterior mediastinal mass of 6 years duration, 8x6 cm in size. The mass was relatively well defined but focally invasive. Microscopically, it was differentiated into vessels of capillary, cavernous, and venous patterns. A solid cellular proliferation with inconspicuous capillary lumens was focally seen. The stroma between variable-sized vessels showed marked myxoid change associated with some smooth muscle bundles and adipose tissue. Ultrastructurally, areas of solid cellular proliferation showed formation of lumens. These lumens were lined by active endothelial cells showing plasmalemmal vesicles and Weibel-Palade bodies on the abluminal surface.
Adipose Tissue ; Capillaries ; Cell Proliferation ; Endothelial Cells ; Hemangioma* ; Mediastinum ; Muscle, Smooth ; Weibel-Palade Bodies

In order to clarify morphologic changes associated with cyclosporine (CS) nephrotoxicity, CS in ethyl alcohol at 25 mg/kg/day i.p. was administered to male Sprague-Dawley rats for periods of 1 to 8 weeks. Mean systolic BP was slightly increased in the CS group at 4 weeks (p < 0.05), but there was no difference compared to a control group at 8 weeks. Blood urea nitrogen was significantly elevated at 4 weeks and continued to rise (p < 0.005), whereas serum creatinine was elevated at 8 weeks. Microscopic examination of the kidneys from CS-treated rats at one week revealed cytoplasmic vacuolization in all segments of the proximal tubules, tubular inclusion bodies, and peritubular capillary congestion. Ultrastructurally, some vacuoles were neutral fat droplets, while others appeared as single membrane-bound structures due to dilatation of the endoplasmic reticulum. The tubular inclusion bodies were enlarged autolysosomes filled with distorted mitochondrial fragments. At two weeks, tubular regeneration was prominent, in addition to the above mentioned toxic tubulopathy. At four weeks, focal areas of interstitial fibrosis and tubular atrophy associated with cystic dilatation were seen. At 8 weeks, interstitial and intratubular microcalcification were present, in addition to patchy foci of interstitial fibrosis, but vascular lesions were not demonstrated. Although renal tubular changes characterized by vacuolization, inclusion bodies, and microcalcification and interstitial fibrosis are not specific for CS toxicity, these changes are commonly found in both humans and rats at high doses of CS.
Acute Disease ; Animal ; Body Weight/drug effects ; Chronic Disease ; Cyclosporine/*toxicity ; Immunosuppressive Agents/*toxicity ; Kidney Diseases/*chemically induced/*pathology ; Kidney Tubules/drug effects/pathology/ultrastructure ; Male ; Microscopy, Electron ; Rats ; Rats, Sprague-Dawley

No Abstract Available.

No abstract available.
Diagnosis* ; Ultrasonography*

No abstract available.
Diagnosis* ; Ultrasonography*