OVERGROWTH OF SEBACEOUS GLANDS. 397 



with a little accessory sac occupied by a new hair In a more or 

 less advanced stage of development; we find the appearances 

 which KoUikei' has figured in his Handbook (figs. 79 and 80). I 

 cannot but seek the essential feature of the ncevus sjnhis In this 

 overgrowth of hair. The sebaceous glands are in nowise implicated. 



§ 340. Once, and once only have 1 met with a true over- 

 growth or THE SEBACEOUS GLANDS, and I question whether 

 the growth described by F'drster under the name of " glandular 

 tumour" of the sebaceous follicles is a true hypertrophy at all, 

 since it exhibits a certain rodent tendency which is only asso- 

 ciated with the false hypertrophies, with lupus and cancroid. 

 The tumour Avhich I examined was sent me by Professor Wernlier 

 of Giessen ; it was as big as a pigeon's Qgg, and attached by a 

 broad base to the hairy scalp ; it was freely moveable. The skin 

 over it was pitted ; the holes could be seen with the naked eye ; 

 they were the mouths of hypertroj^hied sebaceous follicles ; no 

 hairs were present. 



Sections of the tumour forcibly reminded me of slmilai* sec- 

 tions from a normal mammary gland. Amid the thick trabecular 

 of a very tough stroma, there lay acini consisting of from three 

 to five terminal follicles with a common efferent duct ; among 

 these were scattered wider ducts, cut across transversely and 

 obliquely. Each acinus contained very small, round, epithelial 

 cells ; the ducts were filled with solid and liquid fattv matter. 

 The growth as a whole was of a homologous character ; it was 

 nothing more than an overgrowth of the normal type of a seba- 

 ceous gland, similar to that which is normally carried out in the 

 mammary gland. 



§ 341. This is the place to say a few words about a true 



HYPERTROPHY OF THE SUDORIPAROUS GLANDS, by Way of appcudlx 



to the present section ; for I do not intend to devote a separate 

 chapter to these structures. The false hypertrophies of the 

 sweat-glands, like those of the sebaceous follicles, fill under the 

 head either of epithelioma or of lupus. True hypertropliy of the 

 sudoriparous glands gives rise to a flat, fungoid elevation of the 

 skin, which, smooth and hairless. Is not unlike a soft wart. On 

 cutting into it however, we see at once that neither the papillary 

 body, nor any other part of the cutis, is involved. The sweat- 

 glands, as everybody knows, lie at the junction of the skin with 

 the subcutaneous connective tissue ; it is here therefore that the- 



