THE RESPIRATORY SYSTEM. 



479 



Curschmann has described under the name "bronchiolitis exudativa" a 

 form of bronchitis in which small threads and bands of gray or yellow, 

 partly transparent, coagulated material are formed in the small bronchi 

 " Curschmann's spirals." These sometimes occur in pneumonia. In 

 different forms of bronchitis, especially in those associated with asthma, 

 the exudation may contain small, octahedral bodies, probably composed 

 of muciu. They are accidental formations, probably formed from cells,, 

 and may be found in the sputa. 



BBONCHIECTASIA. 



Dilatations of the bronchi may be cylindrical, fusiform, or sacculated. 

 The sacculated dilatations are usually the larger. These communicate 

 with one side of the bronchus. The peripheral portion of the bronchus 

 may be obliterated ; the bronchus leading to the cavity may be of normal 

 size, or dilated, or stenosed, or even completely obliterated. Such sac- 



KIG. 264.- L MuLTiPLE BRONCKIECTASI^E WITH INTERSTITIAL PNEUMONIA. 

 Portion of anterior free border of lungs. From an adult after unresolved lobar pneumonia. 



culated dilatations may reach a very large size and may communicate 

 with each other. Dilatations are apt to occur under conditions which 

 interfere with the integrity of the bronchial wall. 



In acute general bronchitis and broncho-pneumonia in children, cyl- 



