• Niall James McInerney, Nick O'Keeffe, Andreea Nae, Juliana Morariu, and Con Timon.
• Department of Otolaryngology, Royal Victoria Eye and Ear Hospital, Dublin, Ireland. nialljmcinerney@rcsi.ie.
• Ir J Med Sci. 2023 Oct 1; 192 (5): 237323772373-2377.

AbstractCystic hygroma (CH) is a benign congenital lymphatic malformation, occurring predominantly in children, typically as an asymptomatic neck mass. Surgical resection or sclerotherapy is the recommended treatment options. A retrospective review of four cases of adult-onset CH was performed over 2 years by a single surgeon across two institutions. Four patients (two females, median age 31.5 years) who presented with supraclavicular neck masses (range 5-17 cm) are discussed. Ultrasound and MRI demonstrated supraclavicular masses, suggestive of CH. All patients underwent surgical resection. Post-operative courses were uncomplicated, with a mean length of stay of 4 days. All histological samples returned as CH. As of yet, there are no guidelines on the management of CH. Individualised care tailored to each patient, following careful discussion is the most prudent approach. This study demonstrates that surgical resection is a safe and effective treatment for adults in this rarely encountered clinical entity.© 2023. The Author(s).

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