Recurrent pleomorphic adenomas of the parotid gland
| Patient | Age/Sex | Time after Initial Surgery (y) | Site of Recurrence | No. Lesions | Size of Lesions (mm) | T2 Signal/Enhancement Characteristics |
| 1 | 35/F | 16 | Angle of mandible, deep lobe | 1 | 20 | T2 HI, peripheral enhancement |
| 2 | 54/F | 4 | Superficial parotid, subcutaneous tissue op bed | 1 | 9 | T2 isointense, solid enhancement |
| 3 | 38/F | 4 | Inferior parotid gland | 1 | 18 | T2 HI, no enhancement |
| 4 | 49/F | 25 | Inferior parotid gland | 2 | 2–20 | T2 HI, no enhancement |
| 5 | 62/M | 7 | Superficial parotid | 1 | 14 | T2 HI, peripheral enhancement |
| 6 | 32/F | 18 | Subcutaneous tissue op bed, superficial to masseter | 1 | 30 | T2 HI, peripheral enhancement |
| 7 | 63/F | 21 | Multiloculated lesion, superficial parotid | 2 | 10–20 | T2 HI, solid and peripheral enhancement |
| 8 | 62/M | 23 | Preauricular mass, subcutaneous tissue op bed | 2 | 10–25 | T2 HI, heterogeneous enhancement |
| 9 | 37/F | 10 | Preauricular mass, subcutaneous tissue op bed | 2 | 8–15 | CT, smooth margin, enhancing lesions |
| 10 | 59/M | 6 | Superficial parotid | 1 | 19 | CT, single smooth margin, enhancing lesion |
| 11 | 47/F | 25 | Multiloculated lesion, superficial parotid | 2 | 30–40 | T2 HI, peripheral enhancement |
| 12 | 63/F | 24 | Deep parotid, parapharyngeal space, parotid tail, submandibular space, carotid sheath, subcutaneous tissue op bed | Multiple | 4–22 | CT, smooth margin, nonenhancing lesions |
| 13 | 47/F | 8 | Superficial parotid | 2 | 2–9 | T2 intermediate to hypointense, peripheral enhancement |
| 14 | 40/M | 34 | Superficial parotid, subcutaneous tissue op bed, parotid tail | Multiple | 3–8 | T2 HI, solid (smaller lesions) and peripheral enhancement (largest lesion) |
| 15 | 55/M | 35 | Multiloculated lesion, superficial parotid, superficial to masseter, subcutaneous tissue op bed, subcutaneous tissue inferior to tail of parotid | Multiple | 2–30 | T2 HI, heterogeneous enhancement, peripheral enhancement in smallest lesion |
| 16 | 41/M | 5 | Superficial parotid | 1 | 23 | T2 HI, heterogeneous enhancement |
| 17 | 29/F | 10 months | Deep parotid, stylomastoid foramen, parapharyngeal space, subcutaneous tissue op bed, postauricular subcutaneous tissue | Multiple | 4–13 | T2 HI, peripheral enhancement |
| 18 | 58/F | 40 | Subcutaneous tissue op bed | 2 | 2–6 | T2 HI, no enhancement |
| 19 | 31/M | 10 | Multiloculated lesion, superficial parotid, parapharyngeal space, subcutaneous tissue op bed | Multiple | 4–10 | T2 HI, peripheral enhancement |
| 20 | 55/F | 22 | Multiloculated lesion, superficial parotid, deep parotid, stylomastoid foramen, subcutaneous tissue op bed, parapharyngeal space, below tail of parotid | Multiple | 5–15 | T2 HI, peripheral enhancement |
| 21 | 46/M | 6 | Superficial parotid, deep parotid, parapharyngeal space, subcutaneous tissue op bed | Multiple | 4–40 | T2 HI, postgad images, nondiagnostic |
| 22 | 48/F | 21 | Superficial parotid | 1 | 6 | T2 isointense to parotid, hypointense on T1, solid enhancement |
| 23 | 49/M | 24 | Superficial parotid, subcutaneous tissue op bed | Multiple | 1–12 | T2 HI, both solid and peripheral enhancement |
| 24 | 60/F | 5 | Superficial parotid, subcutaneous tissue op bed | 3 | 12, 7, 7 | T2 HI, peripheral enhancement |
Note:—T2 HI indicates T2 hyperintense relative to the normal parotid; op bed, indicates operative bed; postgad, postgadolinium.