Detection of clinically occult primary tumours in patients with cervical metastases of unknown primary tumours: comparison of three-dimensional THRIVE MRI, two-dimensional spin-echo MRI, and contrast-enhanced CT

•Preop localization of the primary tumour is critical in patients with neck LN metastases. •3D THRIVE is more sensitive at detecting primary tumours than is SE T1-weighted MR. •Using the 3D THRIVE sequence may improve biopsy targeting and therapeutic planning. Aim To evaluate and compare the utility of contrast-enhanced three-dimensional (3D) T1-weighted high-resolution isotropic volume examination (THRIVE), spin-echo (SE) T1-weighted magnetic...