Table 4.
Patient Characteristics in Cases of Malignant Tumors That Were Clinically Diagnosed as Melanocytic Nevi and Seborrheic Keratosis (Cases, %)
| Characteristics | MN (3503) | SK (1089) | P value |
|---|---|---|---|
| Overall misdiagnosis | < 0.001 | ||
| Yes | 590 (16.8) | 238 (21.9) | |
| No | 2913 (83.2) | 851 (78.1) | |
| CMTs | < 0.001 | ||
| Yes | 86 (2.5) | 62 (5.7) | |
| No | 3417 (97.5) | 1027 (94.3) | |
| CMTs group | < 0.001 | ||
| BCC | 73 (84.9) | 31 (50.0) | |
| SCC | 6 (7.0) | 26 (41.9) | |
| MM | 7 (8.1) | 5 (8.1) | |
| Clinical diagnosis included “need to rule out CMTs” | 0.258 | ||
| Yes | 22 (25.6) | 11 (17.7) | |
| No | 64 (74.4) | 51 (82.3) | |
| Age of patients with CMTs (years) | < 0.001 | ||
| M±SD | 57.3 ± 12.9 | 67.5 ± 14.2 | |
| 95% CI | 54.5–60.0 | 63.9–71.1 | |
| Age groups of patients with CMTs | 0.001 | ||
| ≤ 20 years | 0 (0.0) | 0 (0.0) | |
| 21–40 years | 9 (10.5) | 2 (3.2) | |
| 41–60 years | 43 (50.0) | 17 (27.4) | |
| >60 years | 34 (39.5) | 43 (69.4) | |
| Sex of patients with CMTs | 0.676 | ||
| Male | 32 (37.2) | 21 (33.9) | |
| Female | 54 (62.8) | 41 (66.1) | |
| CMTs location | 0.251 | ||
| Scalp and neck | 6 (7.0) | 6 (9.7) | |
| Face | 68 (79.1) | 41 (66.1) | |
| Trunk | 5 (5.8) | 7 (11.3) | |
| Buttocks and perineum | 0 (0.0) | 2 (3.2) | |
| Limbs | 7 (8.1) | 6 (5.4) | |
Abbreviations: CMTs, cutaneous malignant tumors; MN, melanocytic nevi; SK, seborrheic keratosis; BCC, basal cell carcinoma; SCC, squamous cell carcinoma; MM, malignant melanoma; CI, confidence interval; M, mean; SD, standard deviation.