The correct answer is C. Stains PAS positive and diastase resistant.

Lichen amyloid is PAS positive and diastase resistant.

Apple-green birefringence on Congo-Red staining. There is no underlying infection in lichen amyloid. Lichen amyloid demonstrates dermal amyloid deposition, not perivascular. Lichen amyloid is not associated with underlying malignancy (like primary systemic amyloid).

References:

Lachmann HJ, Hawkins PN. Amyloidosis of the skin. In: Goldsmith LA, Katz SI, Gilchrest BA, Paller AS, Leffell DJ, Wolff K, eds. Fitzpatrick’s Dermatology in General Medicine. 8th ed. New York, NY: McGraw-Hill; 2012:1574-1584

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