The following table summarizes the diagnostic criteria for pattern analysis as thoroughly explained in step 3.
Diagnosis Global Patterns Specific Local Features Additional Local Features Confoundin Features
Melanoma Multicomponent, reticular, globular, parallel-ridge, unspecific Atypical pigment network, irregular dots/globules, irregular streaks, blue-whitish veil, irregular pigmentation, regression structures, dotted or linear irregular vessels Hypopigmented areas, hairpin vessels, red globules Homogeneous or starburst pattern; typical pigment network, regular dots/globules, regular streaks, milia-like cysts
Clark nevus Reticular, globular, homogeneous Typical pigment network, regular dots/globules, regular diffuse or localized pigmentation, hypopigmented areas Regular streaks, regression structures Multicomponent pattern; atypical pigment network, irregular dots/globules, irregular streaks, irregular pigmentation, dotted vessels
Unna and Miescher nevi Globular, cobblestone, reticular, homogeneous, unspecific Regular dots/globules, exophytic papillary structures, typical pseudonetwork, comma vessels Comedo-like openings, milia-like cysts Multicomponent pattern; irregular pigmentation
Reed and Spitz nevi Starburst, globular, multicomponent Regular streaks, regular diffuse pigmentation, reticular blue-whitish veil, regular dots/globules Dotted vessels, typical pigment network Reticular pattern; atypical pigment network, irregular dots/globules, irregular streaks, irregular pigmentation
Recurrent nevus Multicomponent, homogeneous, unspecific Irregular pigmentation, irregular streaks, white areas Atypical pigment network, irregular dots/globules All local features mentioned in this row are commonly found in melanoma
Blue nevus Homogeneous Regular diffuse pigmentation Hypopigmented areas Irregular diffuse pigmentation, arborizing vessels
Congenital nevus Multicomponent, cobblestone, globular, reticular Regular dots/globules, typical pigment network, localized multifocal hypopigmentation, regular pigmentation  Milia-like cysts, comedo-like openings, exophytic papillary structures Localized irregular pigmentation, regression structures
Combined nevus Multicomponent, homogeneous, globular, reticular  Typical pigment network, regular dots/globules, localized regular pigmentation Hypopigmented areas, exophytic papillary structures Atypical pigment network, localized or diffuse irregular pigmentation
Lentigo Reticular Typical pigment network or pseudonetwork, regular diffuse pigmentation Milia-like cysts, regular dots/globules Atypical pigment network, irregular pigmentation
Labial and genital melanosis Unspecific, parallel Regular diffuse pigmentation, typical pigment network Regular streaks Atypical pigment network, irregular pigmentation
Basal cell carcinoma Unspecific, multicomponent, globular Leaf-like areas, irregular blue-gray dots/globules, arborizing vessels Milia-like cysts, hairpin vessels Irregular gray-bluish pigmentation
Seborrheic keratosis Unspecific, globular, reticular, homogeneous Milia-like cysts, comedo-like openings, exophytic papillary structures, regular diffuse pigmentation, hairpin vessels Typical pigment network, hypopigmented areas, dotted vessels, gyri and sulci, whitish-yellowish horn masses Multicomponent pattern; irregular pigmentation, regression structures, irregular dots/globules
Vascular lesions Lacunar, globular, homogeneous Red lacunas, diffuse or localized structureless reddish-black to reddish-blue pigmentation Parallel pattern, regular dots/globules, whitish-yellowish keratotic areas Multicomponent pattern; irregular dots/globules, whitish veil
Dermatofibra Reticular, unspecific, multicomponent Annular pigment network, central white patch Localized pigmentation or crusting, regular dots/globules, erythema Irregular white areas