PMC5752972_01
(a) The hypopigmented keratotic lesions on the upper back. (b) The close-up appearance of the lesions on the extensor surface of the right upper arm.
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Dermatological examination revealed hypopigmented, 2-5 mm in size, nonfollicular, numerous keratotic lichenoid papules on the whole body with a symmetrical distribution (Figure 1(a)). The lesions coalesced to form larger and linear lesions on the extensor surfaces of the upper arms (Figure 1(b)).
Orthohyperkeratosis, irregular acanthosis, and sporadic papillomatosis. HE x40 (HE: hematoxylin and eosin).
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Histopathological examination of the lesions revealed orthohyperkeratosis, irregular acanthosis, and sporadic papillomatosis (Figure 2).
The appearance of the left upper back and the left upper arm after 2 months of the treatment.
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fig3
The patient was treated with topical 5% salicylic acid in petrolatum for 2 weeks and oral acitretin for 2 months and showed significant improvement predominantly on the keratosis (Figure 3).