... shape,
and placement of nests
Uniform size, shape,
and placement of
nests
Orderly arrange-
ment of nevus cells
in dermis
Nests often at tips of
retia
Nests often at tips of
retia
Transition from
epithelioid ... Clues
Signs of severe solar elastosis
Melanocytes in mitosis near the base of the neoplasm
Abundant melanin in melanocytes near the base of a neoplasm
Signs of regression of parts of the lesion, ... hyperplasia
Usually present Often present Often absent
Basal layer hyper-
pigmentation,
accentuated lower
poles of rete
Often present May be present Usually absent Often present Often present Present...