Skip to main content
. Author manuscript; available in PMC: 2022 Jun 1.
Published in final edited form as: J Allergy Clin Immunol. 2021 Feb 3;147(6):2213–2224. doi: 10.1016/j.jaci.2020.12.651

Figure 1: Ultrasonography identifies deep dermal tunnels in HS.

Figure 1:

Clinical assessment of tunnels marked by superficial ostia (white arrows) (A) Axilla (B) Axilla (C) Breast (D) Axilla. (E-H) Corresponding ultrasound images of tunnels detected by clinical examination. Red arrows highlight the hyperechoic border of the tunnel on ultrasound. (E-H) Light microscopy of the tunnel (1.2x magnification). White brackets outline the tunnel.