Table 2.
Ultrasound characteristics of all identified lesions
| Patient (age, years/sex) | IOUS characteristics and impression | CE-IOUS characteristics and impression |
|---|---|---|
| 1 (73/M) | 2 lesions – anechoic with no wall = cysts | 2 lesions |
| Arterial phase: no rim enhancement Portal and delayed phase: no contrast uptake | ||
| 2 (77/F) | a) Hypoechoic with irregular border = equivocal | a) Arterial phase: hypo-intense with peripheral rim enhancement Portal phase: rim enhancement fades Delayed phase: dark defects (‘black holes’) on background of bright parenchyma = metastasis (classical contrast appearance) |
| b) As patient 1 = cysts | b) Cyst (as patient 1) | |
| 3 (82/F) | a) Hyperechoic with irregular border = equivocal | a/b) Continuous uptake of contrast, no ‘black holes’ Parenchyma bright in all 3 phases |
| b) Mildly hypoechoic, regular border = benign | = benign | |
| 4 (61/M) | 4 similar lesions | Classical contrast appearance of metastases (‘black hole’) (1 lesion not visible in delayed phase) |
| Hypoechoic rim, hyperechoic centre (classical appearance of metastases) | ||
| 5 (30/F) | 2 lesions | 3 lesions |
| a) Classical appearance = metastasis | a) Classical metastasis (‘black hole’) | |
| b) Hyperechoic with posterior enhancement | b) Centripetal filling in delayed and portal phase, brighter than contrast bright parenchyma = haemangioma | |
| c) Classical metastasis | ||
| 6 (77/F) | Classical appearance = metastases | Classical metastases |
| 7 (65/M) | Hyperechoic with irregular border = equivocal | As patient 3 = benign |
IOUS, intraoperative ultrasound; CE-IOUS, contrast-enhanced intraoperative ultrasound; M, male; F, female