To the Editor.—
Dr. Bean, writing in the Archives (99:705, 1969, and 106:72, 1972), has made an excellent study of hyperkeratosis lenticularis perstans (HLP). Since 1970, eight patients with HLP have been reported in the Japanese literature, but most of the Archives readers would not have the opportunity to read the original Japanese articles. The purpose of this letter is to record an additional case of HLP and to review the reported cases of HLP in Japan.
Report of a Case
A 48-year-old Japanese man had noted for the past two years an asymptomatic eruption with scales affecting the dorsa of the feet and hands. No family member was known to have a similar eruption. Examination revealed multiple lenticular, yellowish-brown papules with a keratinous mass on the dorsal aspects of the feet and hands and on the ankles (Figure). Some of the papules had a central depression with glistening surface.
Ikada J. Hyperkeratosis Lenticularis Perstans. Arch Dermatol. 1974;110(3):464-465. doi:10.1001/archderm.1974.01630090090031