Practical pathology; a manual for students and practitioners . congestion, which are specially markedwhere the embolism follows diabetic coma or fracture of a bone,especially of one of the cranial bones. The following case was diagnosedduring life as one of fat embolism, due to fracture of one of the cranialbones. There was intense congestion of both lungs, accompaniedby a number of bright subpleural haemorrhages which, though small,were very distinctly seen. On examination of a fresh section (.§ 36),X50, bright refractile globules were observed in a number of thecapillary vessels, and also in
Practical pathology; a manual for students and practitioners . congestion, which are specially markedwhere the embolism follows diabetic coma or fracture of a bone,especially of one of the cranial bones. The following case was diagnosedduring life as one of fat embolism, due to fracture of one of the cranialbones. There was intense congestion of both lungs, accompaniedby a number of bright subpleural haemorrhages which, though small,were very distinctly seen. On examination of a fresh section (.§ 36),X50, bright refractile globules were observed in a number of thecapillary vessels, and also in some of the larger branches of thepulmonary artery. These were stained black with osmic acid. Inthe stained specimen some of the emboli in the larger vessels weredistinctly seen as elongated masses, completely filling the vessel, and \ 490 TI/£ LUNG ending at its point of bifurcation. At the proximal end of some ofthe fat emboli the vessel had ruptured, and there was an extravasationof blood into the surrounding air vesicles; most of the emboli and \ Fig. 150.—Fat embolism of tlie lung. Stained with osmic acid. ( X 100.) cinb. Fat embolus stained black, filling one of the larger vessels. h. Mass of coloured blood corpuscles in an air vesicle, theresult of rupture of some of the smaller blood vessels behindthe embolus. hemorrhages were situated near the surface, where the terminalbranches of the blood vessels are usually distributed. Harden (§ 60 or 63), stain (§ 135), and mount (i^ 195). ( X 50 and X 300).—Confirm the above points, and ol)serve thedifferent sizes and positions of the fatty globules stained black byosmic acid. Some are extremely small, and are in the centre of theblood mass. Others, larger and crescentic, are adherent to the wallof the vessel; whilst others again completely fill the luniina of vesselsof very various diameters. TUBERCULOSIS—TUBERCLE BACLLLI 49i Similar small haemorrhages are met with in cases of phosphoruspoisoning, in septic fev
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