On the other hand, the face-to-face diagnoses consisted of pigmented basal cell carcinoma (4),
intradermal nevus (6), seborrheic keratosis (4), benign melanocytic lesion (14), blue nevus (3), exogenous pigmentation atypical nevus (2), dermatofibroma (1), congenital nevus (1), solar lentigo (2), and melanoma (3).
The histological criteria of typical MN were the presence of nests of melanocytes / nevus cells that are distributed at the dermoepidermal junction (junctional nevus), confined to the dermis (
intradermal nevus), or with both components Atypical histological features included poor circumscription, asymmetry, irregular confluent nests, predominance of single melanocytes, cytological atypia, frequent mitosis, and presence of necrosis (7).
Cases n Total N Junctional nevus 5 Nevi
Intradermal nevus 7 30 Compound nevus 10 Atypical nevus 8 SSMM 17 PM Nodular Melanoma 29 14 Lentigo Malignant Melanoma 5 MM Metastatic Melanoma 29 29 significance Melanocytic tumor type and subtype Gender Age M F Median(Range) Junctional nevus Nevi
Intradermal nevus 11 19 43 (33-53) Compound nevus Atypical nevus SSMM PM Nodular Melanoma 14 15 58 (48-68) Lentigo Malignant Melanoma MM Metastatic Melanoma 19 10 67 (58-76) significance P = 0.08 P = 0.00025 M: male; F: female; CI: confidence interval; PM: primary melanoma; MM: metastatic melanoma; SSM: superficial spreading melanoma.