150 PATHOLOGY 



occurring at the metatarsophalangeal joint in connection 

 with the affection termed bunion. 



Angioma. Angiomata are benign tumors composed 

 of blood- or lymph-vessels. Those composed of blood- 

 vessels are called hemangiomata, while those com- 

 posed of lymph-vessels are termed lymphangiomata. 

 Strictly speaking, these are usually but enlargements 

 and dilations of existing vessels. In some instances, 

 however, actual proliferation of vessels occurs, espe- 

 cially in hemangiomata. 



Vascular nevi, or Port wine birth-marks, are angio- 

 mata of congenital origin. 



Myoma. Myomata are benign tumors composed al- 

 most exclusively of muscular fibers. 



Leiomyomata are composed of smooth muscular fibers, 

 and occur most frequently in the uterus. 



Rhabdomyomata are composed of striated muscular 

 fibers, and occur in the kidney, uterus, vagina, muscles, 

 etc. 



Glioma. Gliomata are benign tumors composed of 

 neuroglia or the cells of the stroma of the central nervous 

 system. These growths occur in the brain and spinal 

 cord. While they are benign tumors, they are often 

 dangerous to life because of their location. 



Neuroma. Neuromata are benign tumors composed 

 of nerve-fibers. True neuromata are rare. False neuro- 

 mata (fibrous growths springing from the endoneurium 

 or perineurium of nerves) are, in reality, a form of 



