Medium-Sized Congenital Melanocytic Nevus with Halo Phenomenon: A Report of Two Cases

Congenital melanocytic nevi with halo phenomenon in children is a rare clinical finding. We report two cases of children who developed depigmentation within medium-size congenital melanocytic nevi. Clinicians should be suspicious when confronted with this phenomenon due to the risk of development into malignant melanoma. Herein, we review these rare cases of medium-sized halo congenital melanocytic nevi with and without associated vitiligo, with emphasis that depigmentation does not necessarily indicate malignant growth.