86 RESPIRATORY SYSTEM. 
What tumors may be present in the larynx ? 
Retention cysts, papillomata of fibrous connective tissue, fibromata, 
lipomata, myxomata, angiomata, chondromata, sarcomata and 
carcinomata. 
PLEURA. 
What are the different varieties of pleurisy ? 
Pleurisy with the production of fibrin. 
Pleurisy with the production of jibrin and serum. 
Pleurisy with the production of fibrin, serum and pus. 
Chronic pleurisy with the formation of adhesions. 
Tubercular pleurisy. 
‘What are the changes in the first three forms? 
The form of inflammation is of the exudative type, and gives the 
same changes as described with that form of inflammation. There 
may also be a proliferation of the connective-tissue cells. 
Describe chronic pleurisy with the formation of adhesions. 
It may follow after the preceding types, or tubercular pleurisy, or 
may occur by itself. It resembles the productive form of inflamma- 
tion. There is also an increase-in the number of bloodvessels. 
What are the changes in tubercular pleurisy ? 
They are the same as described under tubercular inflammation. 
What tumors have been found occurring in the pleura ? 
Fibromata, lipomata, carcinomata and sarcomata. The two latter 
types usually occurring as metastatic growths. 
BRONCHI. 
What are the changes in an acute catarrhal bronchitis ? 
The changes are those found in a slight exudative inflammation. 
The only lesions produced are, an increased amount of mucus, the, . 
infiltration of the stroma with a few pus cells, and a general conges- 
tion of the mucous membrane. 
What are the lesions of a chronic catarrhal bronchitis ? 
The mucous membrane may be little changed or may be congested. 
The epithelium may be deformed and desquamated, and there may be 
a production of cells in the deeper layers. The smaller bronchi may 
contain mucus and pus. As a rule the microscopical changes seem to 
be very slight when compared with the marked symptoms that may be 
given with the trouble. 
