Table 1.

Characteristics of the case study of 542 atypical melanocytic palmoplantar lesions (aMPPLs) comprising the iDScore-PalmoPlantar dataset.

Lesion Data	n (%)/Mean ± SD
Histological Diagnosis	542
Nevus	429 (79.2%)
Malignant melanoma	113 (20.8%)
Maximum diameter	8.83 ± 7.85
Four macro-areas of the sole	490 (90.6%)
• Toe area (fingers + interdigital spaces + lateral surface of the fingers)	111 (22.7%)
• Eminence of the sole area (anterior lateral + central + anterior medial eminence of the sole)	87 (17.8%)
• Plantar arch area	229 (46.7%)
• Heel area	63 (12.9%)
Three macro-areas of the palm	51 (9.4%)
• Palmar lateral area (proximal phalangeal surface + thenar eminence)	12 (23.5%)
• Fingers (lateral surface of the fingers + fingertips + interdigital spaces)	17 (33.3%)
• Palmar medial area (hypothenar surface + metacarpal surface + central metacarpal)	22 (43.1%)
Patient Data
Age	46.33 ± 19.07
Male	195 (36.0%)
Female	347 (64.0%)
ANAMNESTIC DATA/RISK FACTORS	YES	NO	NA
Personal/family history of melanoma—1st-degree-relative	11 (2.0%)	79 (14.5%)	452 (83.4%)
History of sunburns (>3) in childhood below the age of 14 years	41 (7.5%)	75 (13.8%)	426 (78.5%)
Chronic traumatism of palms	0 (0.0%)	7 (12.9%)	44 (86.3%)
Chronic traumatism of soles	10 (1.8%)	138 (25.4%)	342 (63.0%)
PHENOTYPIC TRAITS
Presence of >100 common nevi or >10 dysplastic nevi on the body	24 (4.4%)	67 (12.3%)	451 (83.2%)
Phototype	355 (65.5%)		187 (34.5%)
• II	94 (17.3%)
• III	248 (45.7%)
• IV	11 (2.0%)
• V	2 (0.3%)
Pheomelanin phenotype	35 (6.4%)	65 (11.9%)	442 (81%)
Presence of green/light blue/blue eyes	51 (9.4%)	76 (14%)	415 (76%)
Presence of blond hair	93 (17.1%)	69 (12.7%)	380 (70.1%)