Dermoscopic Perspective of Chik Sign: A Case Series of Post-Dengue Hyperigmentation

Abstract

‘Chik sign’ is a pattern of facial hyperpigmentation often found in chikungunya and dengue fever. It is an underreported cutaneous manifestation. Here we have highlighted documents of ten patients who were NS1 positive and developed hyperpigmented facial lesions after recovering from dengue fever. This case series has emphasized on clinical presentation, dermoscopic findings and therapeutic outcomes of Chik sign. Dermoscopy revealed a pseudo-reticular pigment network, perifollicular pigment accentuation and brownish globules aiding differentiation from melasma and other pigmentary disorders. All patients responded favorably within 4 to 6 weeks following application of hydroquinone cream and strict sun protection. Awareness and early intervention can ensure favorable outcomes in these cases.

Keywords: Dengue fever, post-dengue hyperpigmentation, dermoscopy, post-inflammatory hyperpig mentation.