Two Cases of Solitary Eccrine Hidrocystoma on the Lower Limb.

Case of giant eccrine hidrocystoma of the scalp

“…Although the “classic” case described by Robinson manifested numerous lesions, Smith and Chernosky 2 reported that most patients with EH had solitary lesions. While “Robinson‐type” multiple EH are relatively common in Japan, “Smith‐type” solitary EH are rare 6,7 . The etiology of EH reportedly involves occlusion of the intradermal portion of the eccrine duct, 3,6 however, Murayama et al.…”

“…suggest that EH is a hamartoma‐like disorder that becomes more pronounced as a result of sweat retention 8 . Fifteen cases of solitary EH have been previously reported in Japan 7,9 . In diameter, these tumors ranged from 1–30 mm and no solitary EH arising on the scalp have been reported in Japan.…”