A summer-exacerbated truncal rash with golden-yellow fluorescence under Wood’s Lamp
Adrian KC Cheng 鄭嘉俊
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Clinical history:
A teenage boy presented with a one-year history of mildly pruritic rashes over his chest, abdomen and back. The limbs were spared. The rashes were more prominent during summer and worsened with sweating. Examination showed erythematous mildly scaly patches over the affected areas. Under a Wood’s lamp (ultraviolet A light; wavelength 365nm), the lesions demonstrated golden-yellow fluorescence.
What is the diagnosis?
| A. | Tinea versicolour |
| B. | Urticaria multiforme |
| C. | Psoriasis |
| D. | Impetigo caused by Staphylococcus aureus |
The slide and the question was prepared by:
Dr. Adrian KC Cheng, MBBS(HK), MRCP(UK), MSc GEOR (CUHK), FHKCP, FHKAM (Medicine)
Specialist in Dermatology & Venereology;
Associate Consultant,