IPLab:Lab 13:Hyaline Membrane Disease

Images

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  This is a gross photograph of lung demonstrating hyaline membrane disease and atelectasis.

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  This is a low-power photomicrograph of a triangular-shaped section of lung (1) and an oblong section of liver (2). The lack of open air spaces in this neonatal lung indicates its immaturity.

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  This is a low-power photomicrograph of liver which contains dark blue-stained cells in the hepatic sinusoids. These are immature blood cell precursors and this represents extramedullary hematopoiesis of the liver.

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  This high-power photomicrograph of liver shows more clearly the immature blood cell precursors (arrows) which represent extramedullary hematopoiesis of the liver. The liver is a normal site of fetal hematopoiesis and, for this stage of gestation, extramedullary hematopoiesis of the liver is normal.

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  This low-power photomicrograph of lung demonstrates hypercellular pulmonary interstitium and small air spaces (as compared to adult lungs).

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  This is a medium-power photomicrograph showing a large bronchus with cartilage. Interstitial congestion with numerous red cells is apparent. Even at this magnification hyaline membranes (arrows) can be seen lining the alveoli.

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  This high-power photomicrograph shows an airway with adjacent lung tissue. Some alveoli have hyaline membranes (arrows). There is severe congestion of the interstitium throughout this section.

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  This medium-power photomicrograph shows the pink acellular homogeneous material lining the alveoli which comprises the hyaline membranes (arrows). The interstitium shows congestion, as in previous sections.

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  This higher-power photomicrograph shows more clearly the hyaline membranes (arrows) and the congestion in the interstitium.