Abstract:Objective To investigate the CT findings and diagnostic value of head and neck lymphatic malformation in children. Methods The CT data of 57 cases of head and neck lymphatic malformations confirmed by surgery and pathology from 2016 to 2021 were analyzed retrospectively. Results 41 cases (about 72%) were under 2 years old. The lesions were located on the left in 26 cases, on the right in 26 cases and on both sides in 5 cases; The lesions were located in the neck and parapharyngeal in 26 cases, in the head and face in 8 cases, and across the head, neck or mediastinum in 23 cases. The clinical manifestations were painless mass in 53 cases (about 93%), facial changes in 25 cases, laryngeal wheezing, dyspnea or dysphagia in 7 cases. The above symptoms could occur alone or at the same time. There were 25 cases of single chamber type and 32 cases of multi chamber type; There were 30 cases of intratumoral hemorrhage; 55 cases of CT diagnosis of lymphatic malformation, the positive rate was 96.5%. CT can show single chamber or multi chamber, round, irregular and lobulated low-density or equal density shadow, creeping growth along the tissue gap, clear or unclear boundary, separation shadow can be seen in the capsule, the contents of the capsule are not strengthened after enhancement, and fibrous separation and capsule wall are strengthened in point, strip, cord and grid shape. When combined with infection or bleeding, the CT value increased, and the liquid-liquid level could be seen at the same time. Conclusions CT examination can clearly show the location, size and range of head and neck lymphatic malformation, and has certain characteristic manifestations, which is of great value for diagnosis and treatment.