Diseases of the chest and the principles of physical diagnosis . - resembled a hernia of the Fig. 232.—Case No. 238S (Phipps Institute). Upper three-fourths of lung taken up bythree cavities with great outgrowth of fibrous tissue. Another important feature of cavities is that those of any considerablesize contain in their walls or the trabecula traversing them, blood-vessels(Fig. 233). As a rule the blood-vessels in and about the cavity becomethrombosed and obliterated. If thej- remain patulous, small aneurismaldilatations occur in their walls and the rupture of one of these will giveri
Diseases of the chest and the principles of physical diagnosis . - resembled a hernia of the Fig. 232.—Case No. 238S (Phipps Institute). Upper three-fourths of lung taken up bythree cavities with great outgrowth of fibrous tissue. Another important feature of cavities is that those of any considerablesize contain in their walls or the trabecula traversing them, blood-vessels(Fig. 233). As a rule the blood-vessels in and about the cavity becomethrombosed and obliterated. If thej- remain patulous, small aneurismaldilatations occur in their walls and the rupture of one of these will giverise to a hemorrhage. Fig. 234 represents a cavity filled with blood clotin which this accident occurred. (See also Fig. 59.) DISEASES OF THE LUNGS 317 In addition to a knowledge of how the disease develops it is importantto recognize the routes it follows from the time the initial deposit oftubercles occurs to the final stages. The proportion of cases in whichthe apex is the primary site of the disease is so large that, generally speak-ing, the exceptions can be disregarded. Laennecs brief des
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