I have last week had a CT scan and the finding that an irregular lobulated heterogeneous mass was identified in the right iliac fossa anterior to the distal external iliac arteries. It measures approximately 43 x 39 x 26mm. Minimal internal vascularity is noted and the appearances are highly suspicious for a malignant deposit. I am having quite significant pain in my back, hip, R) groin and down R) leg. Could this pain be associated with the mass pressing on the artery and do you think that it could be cancer? I had a biopsy done today and it was very painful when the needle was inserted deeply into the mass. Are lobulated heterogeneous masses hard or soft and should there be significant pain with such a biopsy?