Macrocystic lymphatic malformation with intralesional hemorrhage

Case contributed by Yaïr Glick


Retroaxillary bump noticed right after birth.

Patient Data

Age: Newborn
Gender: Male

Elastic nonmobile subcutaneous thoracic mass under right axilla measuring ~3 cm in diameter. The skin is not ulcerated but shows signs of vascularization.

Photo taken with the parents' permission.

Retroaxillary subcutaneous lesion measuring 3.3 x 3.2 x 1.7 cm, of moderate echogenicity, containing dilated lymphatic channels resembling cysts, with internal fluid-fluid levels. No internal vascular flow demonstrated.

Features in keeping with a macrocystic lymphatic malformation with intralesional hemorrhage.

Case Discussion

The lesion was not detected on perinatal ultrasonography and had become swollen due to intralesional hemorrhage, possibly incurred from passage through the birth canal.

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