rounded or flat-topped elevations of skin

mosquito bites

dry, horny, platelike, usually the result of imperfect cornification

Excision and cryosurgery are the treatment of this

brownish, slightly raised,circumscribed, and verrucous.

precancerous lesion

Auspitz sign and Munro abcesses

Psoriasis:

actinic keratosis:

Occasionally these cells fuse and form multinucleate giant cells

slightly raised plaques with variegated pigmentation and irregular borders occurring in both sun-exposed and protected skin.

Nevus cells are arranged in nests in the lower epidermis.

The hallmark of the this is the proliferation of melanocytic nevus cells that look like spindle cells or epithelioid cells.

The nevus cells are found at the dermoepidermal junction and throughout the dermis.

This pigmented lesion occurs on the sun-exposed skin of elderly patients, predominantly on the face and neck.

When Melanoma invades the reticular dermis its level:

When Melanoma extend to papillary dermis its level:

in Melanoma, the most aggressive variant is: