Imaging characteristics of postnatally confirmed fetal third or fourth branchial apparatus anomalies compared with consecutive cases of fetal lymphatic malformation

Third or Fourth Branchial Apparatus Anomalies (n = 4)Lymphatic Malformation (n = 14)P Value
Unilateral4/4 (100%)5/14 (36%)P = .08
Unilocular4/4 (100%)2/14 (14%)P = .005
Medial beak4/4 (100%)2/14 (14%)P = .005
Combination of findings: unilateral, unilocular, with medial beaking4/4 (100%)0/14 (0%)P <.001
Vascular displacement4/4 (100%)7/14 (50%)P = .12
Mediastinal involvement3/4 (75%)5/14 (36%)P = .28
Displaces airway3/4 (75%)11/14 (79%)P = 1.00
Extends posterior to airway4/4 (100%)7/14 (50%)P = .07
Contacts thyroid4/4 (100%)9/14 (64%)P = .12
Areas of susceptibility on EPI0/4 (0%)4/11 (36%)P = .41
Areas of T1 hyperintensity0/3 (0%)3/12 (25%)P = 1.00