A pilot retrospective CT angio study of the internal pudendal arteries in male bodies, for the purpose of penis transplantation to trans men

Figures & data

Figure 1. Set points of measurement along the internal pudendal artery. API: base of the internal pudendal artery. RB: distally to the rectal branch of the internal pudendal artery. BF: bifurcation of the bulbourethral artery and the dorsal artery of the penis.

Table 1. Diameters of the left and right internal pudendal arteries (in millimeters).

	Left API	Right API	Left RB	Right RB	Left BF	Right BF
N Valid	12	12	12	12	11	12
N Missing	0	0	0	0	1	0
Median	2.1	2.4	1.8	1.9	1.5	1.5
Range	2.0–3.7	1.9–3.6	1.5–3.2	1.3–3.1	1.3–1.9	1.1–1.9

API: internal pudendal artery; RB: rectal branch; BF: bifurcation of bulbourethral artery and dorsal artery of the penis.

Table 2. Diameters of the left and right internal pudendal arteries for group with BMI under 30 in millimeters.

	Left API		Right API		Left RB		Right RB		Left BF		Right BF
	BMI <30	BMI >30	BMI <30	BMI >30	BMI <30	BMI >30	BMI <30	BMI >30	BMI <30	BMI >30	BMI <30	BMI >30
N Valid	7	7	7	3	7	3	7	3	7	3	7	3
N missing	0	0	0	0	0	0	0	0	0	0	0	0
Median	2.1	2.0	2.0	2.6	1.7	1.9	1.9	1.9	1.5	1.3	1.5	1.5
Range	2.0–3.5	1.9–3.6	1.9–3.6	2.0–2.8	1.5–3.2	1.8–2.0	1.5–3.1	1.8–2.1	1.3–1.9	1.3–1.8	1.2–1.9	1.3–1.7

API: internal pudendal artery; RB: rectal branch; BF: bifurcation of bulbourethral artery and dorsal artery of the penis.

Figure 2. 3D colour image of highlighted (line marked) passage of IPA from its offspring from the internal iliac artery to the final bifurcation at the root of the penis.

Table 3. Lengths of the left and right internal pudendal arteries (in millimeters).

	Left API-RB	Right API-RB	Left RB-Bif	Right RB-Bif	Left API-Bif	Right API-Bif
N Valid	12	12	11	12	11	12
N Missing	0	0	1	0	1	0
Median	61.1	62.5	54.0	51.6	105.7	116.4
Range	22.6–103.0	34.0–150.8	34.1–70.3	17.8–100.9	75.6–173.3	59.1–177.9

API-RB: distance between the origin of the API and the take-off of its pudendal branch. RB-BiF: distance between the take-off of IPA’s rectal branch, and IPA’s final bifurcation. API-Bif: lengths of the IPA from its origin to its final bifurcation.

Table 4. Lengths of the left and right internal pudendal arteries (in millimeters) and its segments for groups with MBI <30 and BMI > 30.

	Left API-RB		Right API-RB		Left RB-Bif		Right RB-Bif		Left API-Bif		Right API-BiF
	BMI <30	BMI >30	BMI <30	BMI >30	BMI <30	BMI >30	BMI <30	BMI >30	BMI <30	BMI >30	BMI <30	BMI >30
N Valid	7	3	7	3	7	3	7	3	7	3	7	3
N missing	0	0	0	0	0	0	0	0	0	0	0	0
Median	55.3	78.6	48.1	62.2	53.0	57.0	49.6	51.0	91.0	135.6	111.4	114.4
Range	22.6–79.2	64.6–103.0	34.0–150.8	59.6–89.6	34.1–60.5	54.0–70.3	17.8–68.9	42.7–52.2	75.6–137.4	118.6–173.3	59.1–177.9	110.6–132.2

API-RB: distance between the origin of the API and the take-off of its pudendal branch. RB-BiF: distance between the take-off of IPA’s rectal branch, and IPA’s final bifurcation. API-Bif: lengths of tthe IPA from its origin to its final bifurcation.

Figure 3. 3D CT Angiogram of pelvic arteries processed on Siemens Syngo Embolization Guide platform. Left IPA pathway is highlighted correctly, while right IPA pathway was divergent and had to be adjusted manually.