By Gary M. White, MD
This page deals with true halos where the white halo is caused by loss of melanin (skin pigment) or blood. For a similar morphology, see target.
Cafe au lait macules: Cafe au lait macules with halos have been reported in patients with neurofibromatosis. [AD 1992;128;957]
Basal cell carcinoma [AD 1980;116;352]
Giant congenital nevus [Derm 1992;185;140 (CP)]
Halo Melanoma Note how irregular the halo is here, in comparison to a halo nevus (below).
Halo nevus Note how round/oval and regular the white area is.
Spitz nevus [Am J Dermatopath 1995;17;484]
Halo angioma. In the case of an angioma, the halo is usually caused by a relative paucity of blood.