Dermal sinus tracts represent congenital anomalies resulting from aberrant neurulation, often manifesting as small cutaneous openings along the midline of the back. These tracts can extend deeply to ...

Cutaneous dental (or odontogenic) sinus tracts are uncommon occurrences in which a channel forms from a dental focus of infection to a drainage site on the skin of the face or neck. Odontogenic sinus ...

A pilonidal sinus is a small tunnel that develops at the top of the crease in the buttocks. Trapped hair around the buttocks crease can lead to an abscess, and a pilonidal sinus may develop as a ...

A fungal ball is a mass that develops in your sinuses after you’ve breathed in fungal spores. Medications cannot treat it, but a doctor can surgically remove it. Sinus fungal balls are a type of ...