• Rochelle Lorenzo Castillo, Geraldine Zamora Racaza, and Francisca Dela Cruz Roa.
• Section of Dermatology, Department of Medicine, University of the Philippines-Philippine General Hospital, Taft Avenue, Manila, Philippines. shellycastillo@gmail.com.
• Singap Med J. 2014 Apr 1; 55 (4): e60-3.

AbstractKnowledge of both the common and atypical presentations of human immunodeficiency virus (HIV)-associated dermatoses may be helpful in arousing suspicion of HIV, especially in patients with no reported risk factors. Herein, we report the case of an otherwise healthy, nonpromiscuous 29-year-old man who presented to our institution with an eight-week history of plaques with oyster shell-like scales on the trunk, extremities and genital area. The plaques were associated with fever, and intermittent knee pain and swelling. Initial diagnostic tests were suggestive of drug hypersensitivity syndrome, and the patient's condition improved with treatment using oral prednisone. However, the lesions recurred when the dose of prednisone was tapered, even after the culprit drug had long been discontinued. Repeat skin punch biopsy and arthrocentesis revealed a diagnosis of psoriasis vulgaris with psoriatic arthritis. Due to the atypical presentation of psoriasis, the patient was counselled to undergo HIV testing, which came back positive. Clinicians should be attuned to the skin signs heralding HIV/acquired immunodeficiency syndrome, in order to facilitate early diagnosis and treatment.

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