Document aD1w87mG965RrwVZEj1pXEG3B

Hair abnormalities (patchy baldness--alopecia areata). Hair abnormalities (alopecia totalis). Hair abnormalities (blue or violet colored hair). Hair abnormalities (localized canities). Hair abnormalities (excess hairiness on faces of women). Loss of nails. Watchmaker's nail. Beau's lines (transverse color ation of nails, brown or black). Discoloration of nails. Nail inflammation (and tis sues immediately around nails). Common causes--syphilis, arse nic, fungal infections; thallium, barium sulfides; synthetic rub ber intermediates. Baldness in industry; may be caused by x-ray, industrial or medical. Suspect improper or excessive hair dyeing; sometimes deliber ate. Chiefly hereditary. Hormonal dysfunction. Both industrial and nonindustrial causes, such as arsenic, fungal infection, alkalies. Characteristic _ occupational stigma involving hypertrophy of left thumbnail. Occur among mercury workers. Many industrial chemicals. Large number of industrial and nonindustrial chemicals; also nonindustrial infection. Industrially more important than widespread loss of hair because of possible industrial causation R. M. I. Extensive baldness commonly unrelated to work causes, and perhaps more related to testicu lar function, heredity. Usually unrelated to work, but various work materials settling on hair or scalp may impart divers colors. A fair number of persons present localized greying in midst of normally colored hair. In women cosmetic unsightliness from hair often associated with multiple indications of mascu linity. Depends upon specific cause. R. M. I. Due to continual opening of watches. Arise in many forms of debilitat ing disease. Many different colors produced, such as purple from acetanilid, brown from chromates, yellow from TNT, yellow from nitric acid, black from mercury, brown from photographers chemicals, light yellow from picric acid, Drown from hair dyes; many others. Among many others, it occurs among confectionery workers, arsenic workers, bakers, brick layers, chemists, dye workers; seek out particular exposure. Some forms of patchy baldness may involve eyebrows, beard, eyelashes, and the cause may be unknown. Any sudden extensive baldness or any baldness occurring in groups of workers quickly should be investigated. Not disabling and usually tem porary. Ordinarily harmless condition existing from early life. Rarely associated with scalp, skin tumors. May appear first at puberty or only in later life. Frequently nails are slowly sepa rated from bed among dish washers, bottle washers, laun dry workers, etc. Occurrence of condition on wane. R. M. I. Apart from contact, some nail discoloration may be produced as part of general involvement as m argyna. Nails themselves little subject to inflammation. See Chapter XIV. (continued) V IS IB LE M ASKS OF OCCUPATIONAL DISEASES co