A unique case of the rapid onset of a large cystic hygroma in the adult

Cystic hygroma is an uncommon lymphatic tumor seen rarely in adults, with l ess than 100 cases reported in the literature. The etiology and pathophysio logy of this lesion is still in question. The majority of cystic hygromas o ccur in the head and neck, particularly in the posterior triangle. Although cystic hygromas tend to enlarge progressively over a span of weeks or mont hs, relatively rapid enlargement over a span of days has been described. We present the unique case of an adult woman who experienced sudden onset of a large cystic hygroma in the neck without history of antecedent swelling, infection, or trauma. Successful surgical removal of the hygroma was perfor med. A brief review of the literature is presented. (Am J Otolaryngol 2001; 22:206-210. Copyright (C) 2001 by W.B, Saunders Company).