Case Report: Primary cardiac atypical lipoblastoma in an adolescent female

Primary cardiac lipoblastoma is a rare benign tumor of embryonic adipose tissue, typically occurring in infants and young children. This case report describes a 15-year-old female with an atypical lipoblastoma in the pericardial atrioventricular groove-an unprecedented age and location, with imaging features not previously reported. CT showed a hypodense mass without macroscopic fat density, indicating the absence of typical mature adipose tissue, and a slender right coronary artery traversed the lesion without invasion. Postoperative pathology confirmed atypical lipoblastoma. This case illustrates that lipoblastoma may lack macroscopic fat on CT due to immature adipocytic differentiation, and that vascular traversal-as seen with the coronary artery in this case-is a useful imaging clue that may aid radiologists in narrowing the differential diagnosis.