Lesions 



815 



tremely vascular. The mycelial or filamentous mass occu- 

 pies the center of an area of degeneration, where it can 

 be beautifully demonstrated by the use of appropriate 

 stains, Gram's and Weigert's methods being excellent for 



Fig. 271. Melanoid form of mycetoma. Section showing black 

 granules and general features of the lesions as they appear under a 

 low-magnifying power. Zeiss 0,1 (James H. Wright). 



Fig. 272. Melanoid form of mycetoma. showing structure and ap- 

 pearance of the hyphae of the mycelium obtained from the granules. 

 Zeiss apochromat; 4 mm. (James H. Wright). 



the purpose. The tissue surrounding the nodes is infiltrated 

 with small round cells. Tne youngest nodules consist of 

 granulation-tissue, whose development is checked by early 

 coagulation-necrosis. Giant-cells are few. 



