Introduction:
Lymphatic malformations are commonly recognized as relatively benign congenital masses affecting infants and children in the perinatal period. In children, these masses are most commonly found in the neck, and are occasionally seen in other areas of the body.
Presentation of case:
A 58-year-old man presented with an acute axillary swelling measuring approximately 20cm in length, 12cm in AP width, and 7cm in depth. Biopsy and cytology analysis demonstrated this mass to be a cystic hygroma of adult-onset.
Discussion:
Given its multi-loculated nature and size, it was surgically excised and one year later the patient is without evidence of recurrence.
Conclusion:
As the incidence of adult-onset cystic hygroma is rare, the nature and reporting of their management is limited. This case report contributes to the body of literature which serves to elucidate the optimal management of this perinatal condition in adults.