A total of 127 cases of seborrheic keratosis examind at the Dept. of Pathology, Yonsei
University School of Medicine during 1980∼1986 was reviewed.
The results were as follow;
1) Sex distribution showed without preponderance with male; Female ratio of 1.05:1.
2) Age distrubution were 10∼19 years 0.8%, 20∼29 years 4.7%, 30∼39 years 14.2%, 4
0∼49 years 25.2%, 50∼59 years 29.1%, 60∼69 years 17.3%, 70∼79 years 6.3% and 80∼
89 years 2.4%. The man age was 52.2 years.
3) The most common site was face (44.8%), followed by trunk (29.8), lower extremities
(10.4%), scalp (6.7%) and neck (3.7%).
4) The clinical diagnoses were sebrorrheic keratosis (47%), nevus (15.4%), verruca
(12%), malignat melanoma (7.7%), actinic keratosis (3.4%), pyogenic granuloma (2.6%),
mass (2.6%), basal cell epithelioma (0.9%), corn (0.9%), leprosy (0.9%), and
angiokeratoma (0.9%).
5) The distributtions of the light microscopic diagnosis were acanthotic 52 cases
(42.9%), hyperkeratotic 33 cases (30%), irritated 17 cases 13.4%), adenoid 15 cases
(11.8%), clonal 3 cases (2.4%), melanoacanthoma 1 case (0.8%) and mixed 6 cases
(4.7%).
6) The lesions measured from 0.2 cm to 3 cm in maximum diameter and its color was
light brown to black with sharply demarcated papule, pladque or nodule.
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