Table II.
Histologic criteria proposed by Clark, Elder, and colleagues (ref. 41)
| Architecture | Nests bridge rete |
| Nests at the side of rete | |
| Single cells between nests, nests predominating | |
| Lentiginous elongation of rete | |
| Anastomosis of rete | |
| Little or no pagetoid spread | |
| Host response | Patchy lymphocytic infiltrate |
| Eosinophilic fibroplasia | |
| Lamellar fibroplasia | |
| Prominent vessels | |
| Cytology | Variable slight to moderate atypia |
| Few (if any) mitoses | |
| Occasional macronuclei | |
| Scattered epithelioid nevus cells | |
| Scattered cells with finely granular melanin |