月归档:五月 2011

This lung in a patient with tuberculosis 肺癌患者伴肺结核

This is more extensive caseous necrosis, with confluent cheesy tan granulomas in the upper portion of this lung in a patient with tuberculosis. The tissue destruction is so extensive that there are areas of cavitation (cystic spaces) being formed as … 继续阅读

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Caseous necrosis in a hilar lymph node 干酪样坏死在肺门淋巴结

This is the gross appearance of caseous necrosis in a hilar lymph node infected with tuberculosis. The node has a cheesy tan to white appearance. Caseous necrosis is really just a combination of coagulative and liquefactive necrosis that is most … 继续阅读

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Fat necrosis adjacent to pancreas 脂肪坏死毗邻胰腺

Microscopically, fat necrosis adjacent to pancreas is seen here. There are some remaining steatocytes at the left which are not necrotic. The necrotic fat cells at the right have vague cellular outlines, have lost their peripheral nuclei, and their cytoplasm … 继续阅读

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Fat necrosis of the pancreas 胰腺脂肪坏死

This is fat necrosis of the pancreas. Cellular injury to the pancreatic acini leads to release of powerful enzymes which damage fat by the production of soaps, and these appear grossly as the soft, chalky white areas seen here on … 继续阅读

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This abscess is an example of localized liquefacteve necrosis该脓肿是局部性液化性坏死的典型例子

The liver shows a small abscess here filled with many neutrophils. This abscess is an example of localized liquefactive necrosis.

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The small intestine is infarcted 小肠梗死

The small intestine is infarcted. The dark red to grey infarcted bowel contrasts with the pale pink normal bowel at the bottom. Some organs such as bowel with anastomosing blood supplies, or liver with a dual blood suppy, are hard … 继续阅读

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This is an odd place 这是单个梗死灶

The contrast between normal adrenal cortex and the small pale infarct is good. The area just under the capsule is spared because of blood supply from capsular arterial branches. This is an odd place for an infarct, but it illustrates … 继续阅读

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Loss of the blood supply from a major coronary artery led to ischemia and cell death损失的血液供应的一个主要的冠状动脉导致局部缺血和细胞死亡

When there is marked cellular injury, there is cell death and necrosis. This microscopic appearance of myocardium shown here is a mess because so many cells have died that the tissue is not recognizable. Many nuclei have become pyknotic (shrunken … 继续阅读

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Normal immune system maturation正常成熟的免疫系统

In this fetal thymus there is involution of thymic lymphocytes by the mechanism of apoptosis. In this case, it is an orderly process and part of normal immune system maturation. Individual cells fragment and are consumed by phagocytes to give … 继续阅读

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Cellular dysplasia in the uterine cervix子宫颈细胞不典型增生

This is cellular dysplasia in the uterine cervix. The normal cervical squamous epithelium has become transformed to a more disorderly growth pattern, or dysplastic epithelium. This is farther down the road toward neoplasia, but dysplasia is still a potentially reversible … 继续阅读

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