Sonographic Comparison of Morphologic Characteristics
Between Pilonidal Cysts and Hidradenitis Suppurativa
https://www.ncbi.nlm.nih.gov/m/pubmed/28649748
Link below for full research circulation for this
https://drive.google.com/file/d/1jQxYAkAJulXYH6QHrVMal_6o4opeAvDB/view?usp=drivesdk