Figure 3
From: Frequent detection of worm movements in onchocercal nodules by ultrasonography
3A: Longitudinal scan of the patient's right trochanter. A homogenous medium sized onchocercoma can be seen. Although there is no cystic, echo-free area seen, worm movements were detectable in the b-mode image (blue arrow). Lateral shadows and a back wall reflection are visible. The corresponding video image can be seen as Additional File 2. 3B: Transverse scan of the patient's left iliac crest. The worm(s) is (are) surrounded by cystic fluid seen as echo-free areas (yellow arrowheads) and can be differentiated from the capsule of the onchocercoma. In this nodule no worm movements could be detected.