Key clinical message:
Vogt-Koyanagi-Harada Disease (VKHD) is a systemic autoimmune condition
that affects melanocyte-rich tissues, leading to ocular, auditory, and
skin-related complications. While hair loss, vitiligo, and poliosis are
recognized features of VKHD, the emergence of vellus hair on the
normally hairless skin of the distal thumb is an unusual and previously
undocumented occurrence. This case emphasizes the possibility of immune
system dysregulation in VKHD contributing to hair follicle activation in
unexpected areas, broadening our knowledge of its dermatological
effects.