ICHTHYOSIS 



2281 



ICHTHYOSIS— SCLERODERMIA— MORPHEA. 



Every type of Ichthyosis is met with in the tropics, from simple 

 Xerodermia to Ichthyosis hystrix. Diffuse Sclerodermia is rare, 



Fig. 908. — Ichthyosis. 



but circumscribed sclerodermia (morphea) is rather frequent. We 

 have seen a case of Sclerema neonatorum in a Sinhalese baby. 



KAPOSI'S DISEASE— ACANTHOSIS NIGRICANS— DARIER'S 



DISEASE. 



We have seen in the tropics several cases of Kaposi's disease 

 (xerodermia pigmentosa) among European and half-caste children. 

 We have come across in the tropics a case of Acanthosis nigricans. 

 We have observed in Ceylon a typical case of Darier's disease in a 

 Sinhalese beggar. 



LENTIGO— CHLOASMA. 



Freckling cannot be seen in very dark-skinned natives, but is 

 easily visible in half-castes. It is very common among Europeans, 

 especially those who live an open-air life, and are much exposed to 

 the sun. 



Chloasma is a very common affection in the tropics, and is found 

 among Europeans as well as natives. The dark brownish or dirty 

 yellowish patches of chloasma are plainly distinguishable in the 

 skin of Indian and Sinhalese natives, though in African negroes 

 they may be indistinguishable. (For more details see p. 2231.) 



