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A case is presented of squamous cell carcinoma developed from carcinoma in situ of the nail bed of the first finger in a 79-year-old patient. Stress is laid upon the importance of the differential diagnosis. Surgery is considered the treatment of choice for this uncommon condition.

A 15-month-old baby girl with extensive skin burns developed within the burned areas multiple lesions with the clinical and histological characteristics of granuloma pyogenicum. These lesions seem to differ from those reported by others as pyogenic granuloma with multiple satellites.

The authors discuss the main characteristics which enable a differential diagnosis to be made between the dermatoses due to atypical mycobacteria. Persistent bacteriological and epidemiologic studies are likely to result in a solution to the challenging problem presented by the conditions under consideration.

In a 7-year-old girl and a 12-year-old boy, with photosensitivity and hypertrichosis, the diagnosis of familial porphyria cutanea tarda was confirmed by the characteristic pattern of urinary porphyrin excretion, diminished erythrocyte uroporphyrinogen decarboxylase and elevated plasma porphyrin index with emission maxima at 617-618 nm. The patients were treated with a combination of low-dose oral chloroquine and oral S-adenosyl-L-methionine (SAM); in one case alkalinization of urine was also applied. Complete clinical and biochemical recovery was achieved within 3 months. No adverse ophthalmological or other side-effects were observed. We propose that the treatment of choice should be oral SAM (12 mg/kg/day) for 3 weeks and oral chloroquine (2 X 100 mg weekly) for about 120-150 days or until improvement of clinical and biochemical abnormalities is attained. So far no relapses have occurred. This combined therapy appears to be safe, simple, effective and very convenient for both patients and physicians.