Additional File 2.

Longitudinal scan of the patient's right trochanter. A homogenous medium sized onchocercoma can be seen. Although there is no cystic – echo-free area, worm movements are presented in the b-mode image (arrow). Lateral shadows and a back wall reflection are visible. The corresponding image can be seen as figure 3A.

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Mand et al. Filaria Journal 2005 4:1   doi:10.1186/1475-2883-4-1