Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) Before treatment with parenteral vitamin B12. Hypopigmented, well-demarcated patches on the nose, lips, cheeks, eyebrows, part of the ears, and forehead in a symmetrical distribution. (b) Repigmentation of affected parts of the skin 3 weeks after treatment.
