• Alexandra Charrow, Sotonye Imadojemu, Sasha Stephen, Temitayo Ogunleye, Junko Takeshita, and Jules B Lipoff.
• Departments of Internal Medicine and Dermatology, Harvard University, Boston, Massachusetts.
• J. Am. Acad. Dermatol. 2016 Jul 1; 75 (1): 197-202.

BackgroundIgG4-related disease (RD) is a recently described fibroinflammatory condition with both cutaneous and systemic manifestations. To our knowledge, the cutaneous manifestations have not been well characterized or systematically investigated to date in the literature.ObjectiveWe sought to describe the cutaneous manifestations of IgG4-RD to guide clinical practice, aid in the diagnosis of IgG4-RD, and contribute to the creation of robust cutaneous diagnostic criteria.MethodsA systematic search of peer-reviewed publications pertaining to cutaneous manifestations of IgG4-RD yielded 56 cases from 32 case reports and series. The clinical findings among the diagnostic categories were compared.ResultsForty cases of IgG4-RD with cutaneous disease were identified. Cutaneous head and neck involvement was significantly associated with a diagnosis of IgG4-RD (P = .02). Macules and bullae were not described in any of the included cases. Among cases of systemic IgG4-RD, cutaneous head and neck involvement was most common and statistically significantly associated with the diagnosis of IgG4-RD (P = .001).LimitationsThese findings are limited by reporting and publication bias of particular cases and by small sample size.ConclusionsPapules, plaques, and nodules of the head and neck appear to characterize patients with cutaneous IgG4-RD, which nevertheless usually presents with systemic manifestations.Copyright © 2016 American Academy of Dermatology, Inc. Published by Elsevier Inc. All rights reserved.

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