TUMORS. 



331 



on nearly all the cerebro- spinal peripheral nerves. The writer has de- 

 scribed a case (Figs. 177 and 178), in which more than eleven hundred 



>x\fc=-\ i{?rtL*-.' r =b*>* fci^Sis 



FIG. 176. -FALSE NEUROMA-FIBROMA OF LUMBAR NERTE. 



The fibrous tissue is loose in texture and in places oedematous, so that many of the nerve fibres pass through 

 the tumor with little structural alteration. 



and eighty-two distinct tumors were found distributed over nearly all 

 the peripheral nerves of the body. l 



The nerve fibres in these tumors may be crowded apart by the new 

 growth and considerably atrophied ; or, in casqs in which the tumor is 

 composed of soft tissue, as in myxoma or the soft fibroma, they may 



FIG. 177. MULTIPLE FIBROMATA (FALSE NEUROMATA) OF PNEUMOGASTRIC NERVE. One-quarter natural 



size. 



From the same case as that from which the photographic reproduction of Fig. 178 is made. 



pass through or around the tumor entirely unchanged. The multiple 

 false neuromata are in many cases congenital.* 



ANGIOMA. 



Angiomata are tumors consisting in large part or entirely of new- 

 formed blood- or lymph-vessels or cavities. In many tumors of various 

 kinds the new-formed or the old blood- and lymph-vessels may be very 

 abundant or prominent by reason of their dilatations; the vessels of 

 otherwise normal tissues may also be largely dilated, thus simulating 



1 P)-udden, American Journal of the Medical Sciences, vol. Ixxx., p 134, 1880. 

 Consult also Preble and Hektoen, Trans. Assn. Am. Phys., vol. xv., p. 470, 1900. bibl. 



2 For association of these tumors with sarcoma see Larkin, Jour. Med. Research, 

 vol. ix.. 1903. 



