The mass tends to be hypoechoic, or of mixed
echogenicity, with a small, eccentric, gas-filled
lumen. This cannot be differentiated, however,
from an inflammatory mass on ultrasound. Vigorous
Doppler flow can usually be visualized in
both (Fig.ultrasound images below)
Ultrasound images of Hypoechoic, caecal carcinoma. The eccentrically thickened bowel wall is demonstrated with a narrow,
hyperechoic lumen (arrow).
Ultrasound images of Caecal carcinoma presenting as a mass in the right iliac fossa.