Preface. Acknowledgments. Chapter 1 Shape on Low Power. Polypoid. Square/rectangular. Regular acanthosis. Pseudoepitheliomatous hyperplasia above abscesses. Proliferation downward from epidermis. Central pore. Palisading reactions. Space with a lining. Epidermal perforation. Cords and tubules. Papillated dermal tumor. (Suggestion of) vessels. Circular dermal islands. Chapter 2 Top-Down. Hyperkeratosis/parakeratosis. Upper epidermal change. Acantholysis. Eosinophilic spongiosis. Subepidermal space/cleft. Perivascular infiltrate. Band-like upper dermal infi ltrate. Interface reaction. Granular "material" in cells. "Busy" dermis. Dermal material. Change in the fat. Chapter 3 Cell Type. Clear. Melanocytic. Spindle. Giant. Chapter 4 Color-Blue. Blue tumor. Blue infi ltrate. Mucin and glands or ducts. Mucin. Chapter 5 Color-Pink. Pink material. Pink dermis with vessels. Epidermal necrosis. Index by Pattern. Index by Histological Category. Alphabetical Index.