Type I Neurofibromatosis, peripheral type or classic cutaneous form. Permanent, multiple, skin-coloured, calotte-like bulging, soft, smooth papules and nodules in the area of the back of the hand and the sides of the fingers. Positive bell-button phenomenon: subcutaneous tumours protruding like hernia through the skin can be pushed back with one finger.
Fibromatosis, digital infantile. multiple, chronic stationary, disseminated, rough, indolent, skin-colored, smooth papules and nodules without scaling, here on the finger extensor sides of a 10-year-old boy. No joint pain.
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