Fig. 4From: The needle and the damage done: musculoskeletal and vascular complications associated with injected drug useAxial fat-saturated T1-weighted MR images pre-contrast (a) and post-intravenous contrast (b) administration. An intermediate/low intensity defined collection is demonstrated within the perineum. Avid peripheral mural rim-enhancement is seen with non-enhancing internal abscess contentsBack to article page