Pemphigus syphiliticus with Jarisch-Herxheimer reaction in a newborn.

Congenital syphilis is a serious, disabling, and life-threatening infection that is transmitted transplacentally from mother to fetus. Early diagnosis is often difficult because affected infants are usually asymptomatic at birth and clinical findings are often subtle and nonspecific. Pemphigus syphiliticus is an early presentation of congenital syphilis which is characterized by fluid-filled vesicles and bullae which appear mostly on the extremities and tend to rapidly desquamate and erode. Awareness of the clinicians to this early cutaneous manifestation and possible treatment reaction will allow for prompt diagnosis and adequate treatment of syphilis-infected patients.