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Table 2 Main clinical and histological characteristics of 1073 melanoma patients

From: Melanoma characteristics in Brazil: demographics, treatment, and survival analysis

Characteristics Number %
Anatomical location (primary tumour)   
Trunk 347 32.2
Lower extremities 300 28.0
Head and neck 197 18.4
Upper extremities 149 13.9
Mucosa 3 0.3
Multiple 2 0.2
Unknown 9 0.8
Not available 66 6.2
Histological subtype   
Superficial spreading 353 32.9
Nodular 288 26.8
Acral lentiginous 76 7.1
Lentigo maligna melanoma 40 3.7
Other/not classified 156 14.6
Not available 160 14.9
Tumour depth (Breslow)   
Up to 1.0 mm 225 21.0
1.1 to 2.0 mm 184 17.1
2.1 to 4.0 mm 171 15.9
More than 4.0 mm 231 21.5
Not available 262 24.4
Clark classification   
II 110 10.3
III 269 25.1
IV 350 32.6
V 129 12.0
Not available 216 20.0
Ulceration   
Present 307 28.6
Absent 371 34.6
Not available 395 36.8
Mitotic index   
Up to 1 mitosis/mm2 104 9.7
More than 1 mitosis/mm2 260 24.2
Not available 709 66.1
Lymph node status   
N0 615 57.3
N1 87 8.1
N2 72 6.6
N3 87 8.1
Not available 212 19.8
Clinical stage (AJCC)   
I 296 27.6
II 271 25.3
III 214 19.9
IV 168 15.7
Not available 124 11.6