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Psoriasis is generally accepted as an autosomal, irregular, dominantly inherited dermatosis. The incidence of hereditary psoriasis may be as high as 80%.Recently five related persons with psoriasis have come under our care. Careful questioning enabled us to obtain information about their ancestors going back five or six generations.The following genetic charts will be of interest to all who manage this stubborn dermatosis. All five patients are identified by an asterisk on Charts 2 and 3. The cases reported as psoriatic were those who were diagnosed as such by physicians or those who had lesions resembling psoriasis, as described to us. Naturally, many of those identified as "normal" may have, have had, or will yet develop psoriasis.Comment on ChartsA psoriatic woman (A) married to a normal man

THE MANAGEMENT of hidradenitis suppurativa is sometimes difficult, and in chronic cases the results of treatment are often unsatisfactory. Because of therapeutic problems encountered, a review was made of 45 cases treated by us between 1950 and 1953. Table 1 gives a breakdown of these 45 cases from a clinical viewpoint.In acute hidradenitis the lesions were few in number, and they began as deep-seated nodules with a tendency towards cord-like coalescence. These characteristics permitted their clinical differentiation from furuncles of the axilla (or the groin) which are more superficial, more acutely inflamed, and do not show cord-like coalescence.In the chronic localized cases the lesions were also nodular and coalescent, and they showed only slight inflammatory reaction. The secretion was usually more serous than purulent, and there were always sinuses and tract formations as well as irregular and often hypertrophic scars.In the generalized cases most or all skin