Table of Content


Spring 2021, Vol. 29 No. 1

Hong Kong J. Dermatol. Venereol. (2021) 29, 41-42

Dermato-venereological Quiz

Dermato-venereological Quiz

CMT Cheung 張敏彤, AWS Chan 陳慧詩, PCL Choi 蔡祥龍

A 30-year old Chinese man, previously good past health with no known drug allergy, was admitted for acute cholecystitis with emergency operation done. He was also given Augmentin, Vitamin K1, Panadol and Tramadol since admission. Five days later, he complained of itchy rashes over his body and limbs. There were otherwise no systemic symptoms.

Examination revealed symmetrical confluent erythematous maculopapular eruption over trunk and limbs, accentuating over flexural areas (Figure 1). A punch skin biopsy was obtained for histological evaluation (Figure 2).

Figure 1 Confluent erythematous maculopapular eruption, accentuated over the flexures.

Figure 2 Skin biopsy. Haematoxylin & eosin stain, magnification x 400


  1. What are the clinical differential diagnoses?
  2. What does the biopsy show?
  3. What is the diagnosis?
  4. What is the management?