Multiple neutrophilic dermatoses in myelodysplastic syndrome.

A 72-year-old woman developed three consecutive processes that showed characteristics of different neutrophilic dermatoses. First, she developed a picture resembling granuloma faciale, followed by a Sweet's syndrome-like eruption, and then by a superficial pyoderma gangrenosum. She was later diagnosed with myelodysplastic syndrome. This case demonstrates that neutrophilic dermatoses form a spectrum of entities that do not necessarily occur in isolation.

[Familial acanthosis nigricans]. / Acantosis nigricans familiar.

After a brief introduction about the classification and clinicopathological findings of acanthosis nigricans, we present a clinical case of the familial type of acanthosis nigricans in a woman with lesions beginning in childhood and with three family members affected. We comment the characteristics that permit us to individualize this condition from the other forms of benign acanthosis nigricans.

[Progressive symmetric erythrokeratodermia. Report of a case with delayed onset treated by etretinate]. / Eritroqueratodermia simétrica y progresiva. Aportación de un caso de inicio tardío tratado con etretinato.

A case of delayed onset (17 years) progressive symmetric erythrokeratodermia is presented. The treatment with etretinate initially improved the clinical picture, but it had to be discontinued because of personality changes, particularly depressive crisis. In addition, clinical manifestations, histology, kinetics and ultrastructural changes in this condition are also commented on.

[Systemic mastocytosis]. / Mastocitosis sistémica.

We report a case of systemic mastocytosis in a 21-year-old male with skin, liver and bone marrow involvement. During the clinical course he developed important gastrointestinal manifestations including a peptic ulcer probably caused by mast cell mediators. In this article we also review the most remarkable characteristics of mastocytosis, especially their systemic forms.