Incontinentia Pigmenti (IP) is a genetic disease of the skin, hair, teeth and central nervous system. The condition was named because of the way the skin looks under the microscope. "Bloch-Sulzberger Syndrome" is another name commonly used for IP. Other names are: Bloch-Siemens incontinentia pigmenti, melanoblastosis cutis linearis, and pigmented dermatosis, Siemens-Bloch type.