RESUMEN
Pigmented transverse nasal band/groove is an asymptomatic benign condition, characterized by the development of erythematous to hyperpigmented, well-demarcated, transverse groove at the junction of middle and lower two-third of the nasal dorsum. Although the pathogenesis is unclear, embryologic origin seems to be the most plausible hypothesis. This condition is often associated other related dermatological conditions such as milia, comedones, seborrheic dermatitis and atopic dermatitis. Diagnosis is mostly clinical, while reassurance is the mainstay of therapy. In persistent cases, topical retinoids have been used. In this article, we have reviewed the different aspects of this condition including treatment, along with the recent updates to create awareness about this dermatological entity
RESUMEN
Background: Transverse nasal groove is a condition of cosmetic concern which awaits due recognition and has been widely described as a shallow groove that extends transversely over the dorsum of nose. However, we observed variations in the clinical presentations of this entity, hitherto undescribed in literature. Aims: We conducted a clinicoepidemiological study of transverse nasal lesions in patients attending our outpatient department. Methods: We conducted a prospective observational study. We screened all patients attending our out-patient department for presence of transverse nasal lesions, signs of any dermatosis and associated other skin conditions. Results: One hundred patients were recruited in the study. Females (80%) predominated over males. Most patients were of 15-45 years age group (70%). Majority of the transverse nasal lesions were classical transverse nasal groove (39%) and others included transverse nasal line (28%), strip (28%), ridge (4%) and loop (1%). Seborrhoeic diathesis was the most common condition associated with transverse nasal lesion. Conclusions: Occurrence of transverse nasal line, strip, ridge and loop, in addition to classical transverse nasal groove implies that latter is actually a subset of transverse nasal lesions. Common association of this entity with seborrheic dermatitis, seborrhea and dandruff raises a possibility of whether transverse nasal lesion is a manifestation of seborrheic diathesis.