By Gary M. White, MD

A sinus tract is an epithelial-lined tunnel with one opening at the surface of the skin and the other ending blindly. It may form and persist in the setting of acne.


A linear or angular dermal lesion with an opening or pore is characteristic. In contrast to a typical acne cyst, the sinus tract persists. It may periodically fill, become inflamed, drain etc.


Usually, sinus tracts need to be excised.


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