Fig. 5

Commonly injected facial fat compartments and characteristic aspect of various fillers at MRI and CBCT. In all presented cases, the patients were symptom-free and were imaged for other reasons. a 55-year-old woman with collagen filler injections 5 months previously. On coronal STIR image, collagen filler injections in the superior (dashed arrows) and inferior (arrows) jowl compartments are seen as hyperintense, lobulated and reticulated areas. Asterisks indicate large artefacts due to dental implants. b 62-year-old woman with CHA injections 3 years previously. On axial CBCT with bone window settings, streaky calcific density of CHA filler is seen in the left and right medial and middle superficial cheek compartments (arrows) and extending towards the left lateral temporal cheek fat (short arrow). Thin dashed arrows point at the SMAS and muscles of facial expression (levator labii superioris, levator labii superioris aleque nasii, and zygomaticus minor muscles). c 64-year-old man with HIV-LA and HA injection 6 months earlier. Axial STIR image reveals HA injection performed in the deep medial compartment (short arrows) and buccal fat pad (large arrow). d 45-year-old woman with bilateral HA injections. On coronal STIR image, HA is detected in inferior orbital compartments (short arrows) and nasolabial fat compartments (long arrows). e and f 60-year-old woman with bilateral HA injections for cosmetic purposes. On coronal STIR image (e), HA injection of the superior (dashed arrow) and inferior jowl compartments (arrow). Sagittal T1 W image (f) shows hypointense HA in the nasolabial fat (short arrow), medial superficial cheek compartment (dashed arrow) and jowl compartment (arrow). Non-injected buccal fat compartment (asterisk)