Fig. 13
From: Imaging foreign bodies in head and neck trauma: a pictorial review
Plastic drainage tube. Coronal CT image (a) showing a tubular hypodense structure with appositional calcifications in the left submandibular space. Adjacent soft tissue reactions raise the suspicion of superinfection. Note the retraction of the soft tissue contour (asterisk), representing the old surgical scar. b Photograph of 3 parts of a drainage tube after removal