Colloid degeneration of the skin, known as colloid milium, hyaloma and colloid pseudomilium, is a rare disease in North America and Europe. Jager1 in 1925 stated that not more than 19 authenticated cases had been reported since Wagner described it in 1866. Reuter and Becker2 were able to find only about 50 cases in 1942. Arnold3 recently added 1 case.
Australia is justly famous for its sunny climate. Over most of the continent the sky is clear and cloudless except for a few cumulus clouds about three hundred days a year. On the other days the sun shines at least part of the time. Over 90 per cent of the Australians are of English descent, and a large proportion of them are fair skinned and blond. Here is a perfect laboratory for the study of the effects of excessive sunlight on the susceptible human skin.
HAND EA. COLLOID DEGENERATION OF THE SKIN: REPORT OF THREE CASES FROM AUSTRALIA. Arch Derm Syphilol. 1944;49(4):234–235. doi:10.1001/archderm.1944.01510100010002
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