Clinical differences between segmental nevus depigmentosus and segmental vitiligo

Area of Science:

• Dermatology
• Medical Diagnostics

Background:

• Segmental nevus depigmentosus and segmental vitiligo present diagnostic challenges.
• Accurate differentiation is vital due to differing prognoses and psychological impacts.

Purpose of the Study:

• To identify clinical indicators for differentiating segmental nevus depigmentosus from segmental vitiligo.
• To aid clinicians in accurate diagnosis and patient management.

Main Methods:

• A comparative study involving 63 patients with segmental nevus depigmentosus and 149 with segmental vitiligo.
• Evaluation of clinical parameters including age of onset, lesion site, dermatomal distribution, lesion margin, and presence of poliosis.

Main Results:

• Segmental nevus depigmentosus typically presents before age 10, while segmental vitiligo has a later onset in many cases.
• Distinct differences observed in lesion distribution (trunk/cervical for nevus depigmentosus; face/trigeminal for vitiligo), lesion margins (more serrated in nevus depigmentosus), and proximity to the body's axis.
• The number of dermatomes involved in truncal lesions also differed significantly between the two conditions.

Conclusions:

• Clinical features such as lesion distribution, margin characteristics, and age of onset are valuable in distinguishing segmental nevus depigmentosus from segmental vitiligo.
• These findings can improve diagnostic accuracy and guide appropriate treatment strategies.