Naevus anaemicus with teleangiectatic vessels

Area of Science:

• Dermatology
• Vascular Malformations
• Histopathology

Background:

• Naevus anaemicus is a congenital, usually benign, pale macule caused by decreased blood flow.
• Port-wine stains (naevus flammeus) are common vascular malformations.
• Understanding the underlying vascular structures in congenital skin conditions is crucial for diagnosis and treatment.

Observation:

• Dermabrasion of a naevus anaemicus lesion on a patient's chest revealed enlarged, dark-red, telangiectatic vessels.
• These vessels differed significantly from the smaller capillaries observed in normal skin or vitiligo after dermabrasion.
• The presence of both naevus anaemicus and a port-wine stain in the same location suggested a phenomenon of vascular twin spotting.

Findings:

• Epidermal removal exposed a distinct vascular network within the naevus anaemicus, indicative of underlying vascular anomalies.
• The vascular twin spotting phenomenon was clearly visualized after epidermal ablation.
• Thin epidermal grafting resulted in healing but did not alter the appearance of the naevus anaemicus one year post-procedure.

Implications:

• This observation provides insights into the vascular architecture of naevus anaemicus and its potential coexistence with other vascular malformations.
• The findings suggest that naevus anaemicus may involve deeper, abnormal vascular structures not apparent in superficial examinations.
• Further research into grafting techniques or alternative treatments may be necessary for potential cosmetic improvement, though current methods are limited.