Fig. 6

Hidradenitis suppurativa of the axilla. Massive hypoechoic thickening (yellow arrowheads) of the dermis (A) with pathological hypervascularization on high-sensitivity color Doppler (B) can be promptly observed at the level of the axillary skin. Very high-frequency ultrasound probes (C, D) better define additional sonographic signs of hidradenitis suppurativa as the superficial, saclike fluid collections (white asterisks) and the ballooning of hair follicles (white dotted line). HH Humeral head