Fig. 4From: Intruding implements: a pictorial review of retained surgical foreign objects in neuroradiologyBone wax granuloma. Axial unenhanced CT (a), T2-weighted (b), unenhanced (c), and post-contrast (d) T1-weighted images presenting an ovoidal mass (arrow in a, b, and c) hypointense on all sequences and surrounded by vasogenic edema (arrowheads in b). After contrast administration, rim enhancement is detectable (arrow in d)Back to article page