Review Article

MRI Visualization and Distribution Patterns of Foreign Modeling Agents: A Brief Pictorial Review for Clinicians

Figure 6

FatSat proton density sequence magnetic resonance was showing complications in the facial area in two different patients. Patient 1: this patient used polymethacrylate, an amount of 30 ml. (a) Axial T2 sequence: infiltration with a diffuse pattern of hyperintense signal is observed in the bilateral periorbital subcutaneous cellular tissue (white arrowheads). (b) Coronal T1 sequence, the signal in this sequence is hypointense, visualizing bilateral periorbital inflammation (white arrowheads). Patient 2: he used hyaluronic acid as a modeling agent with an approximate amount of 25 ml. (c) Axial plane: diffusely increased signal intensity is observed in the superficial soft tissues of the nasal pyramid due to infiltration of modelling material (white arrow). (d) Sagittal plane: in addition to infiltration with a diffuse pattern in the nasal pyramid, there is infiltration in the lips (white arrows). The importance of mentioning the amount of modelling agent and injected region is that these patients usually do not undergo surgery on the face (this case was from a patient with one of the most considerable amounts injected). For these patients, surgeons keep the clinical decision expectant; patients are managed with vigilance to avoid postsurgical aesthetic complications such as scars. Readers should remember that the face region usually receives smaller injected amounts than other areas), therefore, do not develop autoimmune systemic inflammatory syndromes as often as other regions.
(a)
(b)
(c)
(d)