The mask of deficiency: A rare case of facial hyperpigmentation in vitamin B12 deficiency - a case report and review of literature.

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Title: The mask of deficiency: A rare case of facial hyperpigmentation in vitamin B12 deficiency - a case report and review of literature.
Authors: Viswanathan RA; Assistant professor, Department of General Medicine, Sri Manakula Vinayagar Medical College and Hospital, Puducherry, India.
Source: Tropical doctor [Trop Doct] 2026 Jan; Vol. 56 (1), pp. 215-218. Date of Electronic Publication: 2025 Sep 16.
Publication Type: Journal Article; Case Reports; Review
Journal Info: Publisher: Sage Country of Publication: England NLM ID: 1301706 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1758-1133 (Electronic) Linking ISSN: 00494755 NLM ISO Abbreviation: Trop Doct Subsets: MEDLINE
Database: MEDLINE Ultimate
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ISSN:1758-1133
DOI:10.1177/00494755251378821