Table 3. Tumors of the epidermis (1080, 48.5%).
| Type of tumor | Cases | Epidermal tumors (%) | All tumors (%) | Mean age (range), y | Sex ratio (F/M) | Location (U/L) |
| Benign tumors and cysts (874, 80.9%) | ||||||
| Seborrheic keratosis | 266 | 24.6 | 11.9 | 57 (18-35) | 1/1 | 0.6/1 |
| Squamous cell papilloma | 252 | 23.3 | 11.3 | 45 (9-86) | 1.3/1 | 0.8/1 |
| Epidermal cyst | 222 | 20.5 | 10 | 54 (6-84) | 1/1 | 2.5/1 |
| Dermoid cyst | 74 | 6.9 | 3.3 | 25 (1-74) | 1.2/1 | 5.7/1 |
| Inverted follicular keratosis | 36 | 3.3 | 1.6 | 63 (37-86) | 1.1/1 | 0.9/1 |
| Keratoacanthoma | 23 | 2.1 | 1 | 63 (28-85) | 0.5/1 | 1.3/1 |
| Pilar sheath acanthoma | 1 | 0.09 | 0.04 | 51 (51-51) | 0/1 | 0/1 |
| Premalignant tumors (26, 2.4%) | ||||||
| Actinic/solar keratosis | 26 | 2.4 | 1.1 | 59 (26-75) | 1.6/1 | 0.9/1 |
| Malignant tumors (180, 16.7%) | ||||||
| Basal cell carcinoma | 165 | 15.3 | 7.4 | 63 (12-85) | 0.9/1 | 0.3/1 |
| Squamous cell carcinoma | 11 | 1 | 0.5 | 58 (40-80) | 1.2/1 | 1.8/1 |
| Papillary squamous cell carcinoma | 2 | 0.2 | 0.09 | 65 (54-76) | 1/1 | 1/1 |
| Basosquamous carcinoma | 2 | 0.2 | 0.09 | 53 (49-57) | 0/2 | 1/1 |
F/M: Female/male; U/L: Upper/lower eyelid.