A child with fever presents with multiple tender erythematous skin lesions. On microscopic examination the skin lesions are seen to have neutrophilic infiltration in the dermis. What is the diagnosis: (A) Sweet syndrome, (B) Bechet's syndrome, (C) Pyoderma gangrenosum, (D) Juvenile dermatosis
Answer is A. Sweet syndrome is a neutrophilic dermatosis. Skin lesions consist of multiple, dusky, erythematous, tender papules or nodules that coalesce to form irregular plaques. There is fever and neutrophilic leukocytosis. In pyoderma gangrenosum is a rare , non infectious , neutrophilic dermatosis commonly associated with underlying systemic disease. From illustrated synopsis of dermatology and sexually transmitted diseases neena khanna 5th edition page no 202, 203