KIT and endometriosis: In terms of endometriosis lesion subtypes, the intestinal endometriosis lesions (Figure 3E,F) contained the largest quantities of both NOTCH1+ (11.5 ± 7.7%) and CD117+ endometrial stromal cells (7.9 ± 6.2%), followed by the cutaneous scar (11.4 ± 4.9% NOTCH1+ and 0.48 ± 0.35% CD117+ stromal cells).