Table of Content


Spring 2016, Vol. 24 No. 1

Hong Kong J. Dermatol. Venereol. (2016) 24, 49

Dermato-venereological Quiz

Dermato-venereological Quiz

FC Ip 葉方正

A four-month old girl was referred for a white patch on the buttock since birth. The mother recalled that the patch would sometimes become more prominent when the baby was crying. The baby girl was born full-term uneventfully. There was no family history of inheritable diseases. Physical examination revealed a hypopigmented pale patch with irregular and a fairly well demarcated border on the right buttock (Figure 1). There was no epidermal change. On palpation there was no induration or swelling in the patch.

Figure 1


  1. What bedside tests would you perform to help the diagnosis?
  2. What are the differential diagnoses and which one is the mostly likely diagnosis?
  3. What further workup would you like to do?
  4. What is the management?