polygonal/hemorrhage

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Intra-epidermal and intra-dermal sebocrine adenoma with cystic degeneration and hemorrhage.

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BACKGROUND The ducts of eccrine glands may give rise to intra-epidermal, confluent epithelial and intra-dermal adenomas known as hidroacanthoma simplex, eccrine poroma, and dermal duct tumor, respectively. An apocrine and sebaceous counterpart of the eccrine poroma has been described by several

Vascular changes involved in pulmonary hemorrhage of stroke-prone spontaneously hypertensive rats.

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The frequency of pulmonary hemorrhagic lesions in stroke-prone spontaneously hypertensive rats (SHRSP) was higher in older than in younger rats. Hemoglobin and protein contents in pulmonary lavage fluid which may indicate alveolar hemorrhage showed an increase with the progress of age, but the

Thymic cystic degeneration, pseudoepitheliomatous hyperplasia, and hemorrhage in a dog with brodifacoum toxicosis.

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Thymic cysts with pseudoepitheliomatous hyperplasia are described in a 7-month-old female American Eskimo Dog that died of complications from brodifacoum poisoning. Grossly, there was hemothorax with marked cranial mediastinal hemorrhage. Histologically, thymic lobules were expanded and distorted by

Severe intestinal bleeding caused by intestinal metastases of a primary angiosarcome of the thyroid gland.

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A 75 year old male presented with gastrointestinal bleeding after resection of both upper lobes of the lungs because of metastases. One year ago an angiosarcoma was the reason for a complete removal of the thyroid gland. In esophago-gastro-duodenoscopy we found multiple hemorrhagically stained

Laparoscopic findings in hereditary haemorrhagic telangiectasia (Osler-Weber-Rendu disease).

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The laparoscopic findings observed in eight patients with hereditary haemorrhagic telangiectasia are reported. Clinical signs or laboratory data suggestive of liver involvement were present in all cases and constituted the main indication for laparoscopic examination. Characteristic vascular lesions

Fatal haemorrhage and neoplastic thrombosis in a captive African lion (Panthera leo) with metastatic testicular sex cord-stromal tumour.

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BACKGROUND The study of neoplasia in wildlife species contributes to the understanding of cancer biology, management practices, and comparative pathology. Higher frequencies of neoplasms among captive non-domestic felids have been reported most commonly in aging individuals. However, testicular

A novel angiomatoid epithelioid sarcoma cell line, Asra-EPS, forming tumors with large cysts containing hemorrhagic fluid in vivo.

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BACKGROUND Whereas we can use several human epithelioid sarcoma (ES) cell lines for basic and preclinical research, an angiomatoid ES cell line has not been reported to date. We have treated a case of an angiomatoid ES developing in the right upper extremity of a 67-year-old man. METHODS An

Primary pulmonary primitive neuroectodermal tumor (PNET). A case report.

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We describe a rare case of a primary primitive neuroectodermal tumor (PNET) in the lung of a 17-year-old girl. Grossly, the tumor, located in the right lower lobe, was relatively well-circumscribed and whitish to yellowish in color with scattered hemorrhagic necrosis. Microscopically, the tumor was

Extraskeletal osteosarcoma with pulmonary metastasis in a female f344 rat.

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A subcutaneous mass in the right femoral region of a female F344 Slc/N rat was examined histopathologically. At 83 weeks of age, the animal showed symptoms of severe anemia and nasal bleeding. Necropsy revealed that the mass had invaded the skeletal muscles but did not affect the bones. Multicentric

Pure pleomorphic rhabdomyosarcomas of the uterus.

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Pure rhabdomyosarcoma arising in the uterus is a rare tumor currently classified by the World Health Organization (WHO) as a uterine sarcoma. The records of eight women with uterine rhabdomyosarcomas were retrieved from the files of the Armed Forces Institute of Pathology (AFIP). The eight women

In vivo characterization of abnormalities in small-bowel diseases using probe-based confocal laser endomicroscopy.

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OBJECTIVE Probe-based confocal laser endomicroscopy (pCLE) enables real-time optical biopsy. Little is known about pCLE imaging deep inside the small bowel, therefore the aim of this study was to determine its usefulness. METHODS Between April 2014 and January 2016, we performed 38 pCLE examinations

Dermoscopy of Skin Adnexal Neoplasms:A Continuous Challenge.

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Dear Editor, Apocrine hidradenoma is a rare benign adnexal tumor related to the more common poroma, as they both originate from sweat glands. Hidradenoma usually has an eccrine differentiation, but an apocrine differentiation is possible. Due to its rarity and non-specific clinical appearance it is

Portal hypertensive gastropathy: A systematic review of the pathophysiology, clinical presentation, natural history and therapy.

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OBJECTIVE To describe the pathophysiology, clinical presentation, natural history, and therapy of portal hypertensive gastropathy (PHG) based on a systematic literature review. METHODS Computerized search of the literature was performed via PubMed using the following medical subject headings or

Pulmonary sclerosing hemangioma presenting with dense spindle stroma cells: a potential diagnostic pitfall.

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Pulmonary sclerosing hemangioma (PSH) is an uncommon pulmonary tumor. Histologically, PSH typically consists of two types of cells, surface cuboidal cells and polygonal cells, four architectural patterns including papillary, sclerotic, solid, and hemorrhagic. Herein, we present a case of PSH in a

Cytohistologic correlations in angiosarcoma including classic and epithelioid variants: Institut Curie's experience.

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To characterize the cytological features of angiosarcomas, we reviewed the fine-needle aspiration material and corresponding histologic sections of 29 tumors in 23 patients. Histologically, 24 tumors were of the classic type, and 5 were epithelioid angiosarcomas. The original corresponding cytologic

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