Radiological features of head and neck mammary analogue secretory carcinoma: 11 new cases with a systematic review of 29 cases reported in 28 publications.

MASCs are newly recognized malignant tumors. Characteristic T1WI high intensity on MRI and predominant cystic morphology may reflect its unique histological profile. Ill-defined tumor margin status was related to frequent metastasis. Awareness of these characteristic radiological features can assist radiologists in better detection of this novel entity.