[Sweet syndrome with immune complex vasculitis in a child].

We report on a rare case of Sweet's syndrome (SS) in a 7-year-old boy showing typical symptoms such as high fever, neutrophil leucocytosis in peripheral blood, elevated blood sedimentation rate, and arthralgia. The cutaneous lesions were painful erythematous, raised plaques on both limbs and the face. Histology confirmed the clinical diagnosis, including remarkable signs of cutaneous small vessel vasculitis, which was verified by direct immunofluorescence for IgM and complement (C3) in vessel walls as well as by the presence of circulating immune complexes in the blood.

[Benign chronic bullous dermatosis in childhood with involvement of the mouth mucosa].

We report on a rare case of benign chronic bullous dermatosis of childhood (BCBDC) in a 5-year-old girl. In addition to the characteristic symptoms such as abrupt onset of the disease, tense blisters, predominant affection of the face, and later imitation of impetigo, we observed uncommonly extensive involvement of the oral mucosa. Whereas histopathology was not diagnostic, direct immunofluorescence could verify BCBDC as it showed linear deposits of IgA along the basement membrane zone.

[Sterile eosinophilic pustulosis].

Sterile eosinophilic pustulosis (SEP) first described by Ofuji et al. in 1970 as "eosinophilic pustular folliculitis," is obviously a new entity. The majority of patients are Japanese.