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Both pyogenic granuloma and Kaposi’s sarcoma consist of proliferations of endothelial cells, and both are hyperplasias. In most instances, papules and nodules of Kaposi’s sarcoma are differentiated easily by microscopy conventional from lesions developed fully of pyogenic granuloma. Problems of differential diagnosis arise, however, when lesions of Kaposi’s sarcoma ulcerate and granulation tissue forms exuberantly […]