PMC9869679_01
(A) Multiple tortuous tubular structures within an irregularly shaped anechoic lesion were revealed by B-mode ultrasound. (B) Color Doppler flow imaging displayed rich colorful blood flow signals as a colored mosaic pattern. (C) Spectral Doppler showed continuous turbulent flow in the systolic and diastolic phases with a high-velocity low-resistance waveform.
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F1
Color Doppler flow imaging (CDFI) displayed rich colorful blood flow signals as a colored mosaic pattern in the same lesion, and spectral Doppler showed continuous turbulent flow in the systolic and diastolic phases with a high-velocity low-resistance waveform (Figure 1).
Computed tomographic angiography showed a large pelvic arteriovenous malformation (red arrow) supplied mainly by the right internal iliac artery.
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F2
The patient underwent computed tomographic angiography (CTA) after the sonographic diagnosis of pelvic AVM, whereby a large pelvic AVM supplied mainly by the right internal iliac artery was found (Figure 2), thus confirming the final diagnosis of pelvic AVM.
(A) Arteriography demonstrated pelvic arteriovenous malformation and feeding arteries arising from the right internal iliac artery. (B) Arteriography postembolization.
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F3
When arteriography indicated feeding arteries arising from the right internal iliac artery, the right internal iliac artery was embolized by spring coils (Figure 3).
(A) Part of the irregularly shaped anechoic lesions became hypoechoic (red arrow) in the B-mode ultrasound. (B) Color Doppler flow imaging showed the colored mosaic pattern decreased in volume. (C) Spectral Doppler showed the systolic blood flow velocity is reduced after embolization.
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F4
He remained asymptomatic during the follow-up period and was re-examined with abdominal US 19 months after embolization, in which the pelvic AVM decreasing in volume and the systolic blood flow velocity reduction were revealed (Figure 4).