Frequency of the prominent transverse nasal root vein in children.

Background: The presence of a vascular, blue linear discoloration on the nasal root of infants and young children is a frequent incidental feature, rarely reported in the medical literature. It is related to the trajectory of the transverse nasal root vein (TNRV).

Objective: To study the frequency and clinical characteristics of the vascular discoloration of the nasal root in children.