TWO CASES OF NEVUS FUSCOCAERULEUS WITH PAIN, INCLUDING A CASE OF PILAR NEUROCRISTIC HAMARTOMA

Two patients with nevus fuscocaeruleus over the back and simultaneous pain were reported. Although the significance of this association remains to be clarified, it is interesting because the dermal melanocytes and nerves are of neuroectodermal origin. Histology of one case revealed findings consistent with those of pilar neurocristic hamartoma (1). Electron microscopy revealed dermal melanocytes in the neighborhood of a nerve. Photographic studies confirmed Morikawa's view (2) that the location of melanin may be examined by reflection ultraviolet photography, conventional photography, and infrared photography.