- Acantholysis
- Actinic keratosis
- Darier disease
- Grover disease
- Hailey-Hailey disease
- Herpes virus infection
- Pemphigus foliaceus
- Pemphigus vulgaris
- Pityriasis rubra pilaris
- Squamous cell carcinoma
- Warty dyskeratoma
- Acanthosis, regular epidermal
- Bowen disease
- Clear cell acanthoma
- Inflammatory linear verrucous epidermal nevus
- Psoriasis
- Band-like dermal/papillary dermal infiltrate
- Langerhans cell histiocytosis
- Lichen nitidus
- Mastocytosis
- Mycosis fungoides
- Zoon balanitis
- Blue dense infiltrate see Diffuse/nodular infiltrate
- Blue tumor
- Basal cell carcinoma
- Glomus tumor
- Lymphoma
- Merkel cell carcinoma
- Sebaceoma (sebaceous epithelioma)
- Sebaceous carcinoma
- Spiradenoma
- Trichoblastoma
- Trichoepithelioma
- Tufted angioma
- “Busy” dermis
- Blue nevus, hypopigmented
- Dermatofibroma
- Granuloma annulare
- Kaposi sarcoma
- Leukemia cutis
- Metastatic breast carcinoma, interstitial pattern (carcinoma en cuirasse)
- Central pore
- Dilated pore of Winer
- Pilar sheath acanthoma
- Trichofolliculoma
- Change in the fat see Fat, change in the
- Circular dermal islands
- Adenoid cystic carcinoma
- Cylindroma
- Spiradenoma
- Trichoadenoma
- Trichoblastoma
- “Clear cells”
- Angiolipoma
- Clear cell acanthoma
- Cryptococcosis, gelatinous
- Granular cell tumor
- Hibernoma
- Histoplasmosis
- Leishmaniasis
- Lepromatous leprosy
- Lipoma
- Melanoma, balloon cell
- Nodular hidradenoma
- Renal cell carcinoma
- Sebaceous adenoma
- Trichilemmoma
- Xanthelasma
- Xanthogranuloma
- Xanthoma
- Cords/tubules and comma shapes
- Desmoplastic trichoepithelioma
- Metastatic breast carcinoma
- Microcystic adnexal carcinoma
- Morpheaform basal cell carcinoma
- Syringoma
- Dermal material
- Amyloidosis, nodular
- Calcinosis cutis
- Cryoglobulinemia (type I)
- Erythropoietic protoporphyria
- Gel foam
- Gout
- Hyaluronic acid (dermal filler)
- Lipoid proteinosis
- Ochronosis
- Osteoma cutis
- Paraffinoma
- Pseudoxanthoma elasticum
- Tattoo
- see also Mucin; Pink material
- Diffuse/nodular infiltrate
- Acne keloidalis
- Discoid lupus erythematosus
- Granuloma faciale
- Leukemia (myelogenous)
- Lymphoma
- Mastocytoma
- Sweet syndrome
- Endothelial cells (suggestion of vessels)
- Angioleiomyoma
- Angiolymphoid hyperplasia with eosinophilia
- Angiosarcoma
- Bacillary angiomatosis
- Chondrodermatitis nodularis helicis
- Dermatofibroma, hemosiderotic
- Fibrous papule
- Glomus tumor/glomuvenous malformation (glomangioma)
- Infantile hemangioma
- Kaposi sarcoma
- Lichen sclerosus
- Pyogenic granuloma
- Radiation dermatitis
- Stasis dermatitis
- Targetoid hemosiderotic hemangioma (hobnail angioma)
- Eosinophils, epidermal
- Allergic contact dermatitis
- Arthropod bite reaction
- Bullous pemphigoid
- Incontinentia pigmenti
- Pemphigus vegetans
- Scabies
- Epidermal necrosis
- Aspergillosis
- Burn
- Erythema multiforme
- Herpes simplex infection
- Nutritional deficiency
- Epidermal perforation
- Calcinosis cutis, perforating
- Elastosis perforans serpiginosa
- Granuloma annulare, perforating
- Reactive perforating collagenosis
- Fat, change in the
- Angiolipoma
- Dermatofibrosarcoma protuberans (often extends into the fat)
- Erythema induratum
- Erythema nodosum
- Hibernoma
- Lipodermatosclerosis
- Lupus profundus
- Nodular fasciitis (often deep in the fat)
- Pancreatic fat necrosis
- Polyarteritis nodosa
- Post-steroid panniculitis
- Sclerema neonatorum
- Subcutaneous fat necrosis of newborn
- Subcutaneous T-cell lymphoma
- Giant cells
- Atypical fibroxanthoma
- Erythema nodosum
- Giant cell tumor of tendon sheath
- Juvenile xanthogranuloma
- Mucocele
- Necrobiosis lipoidica
- Necrobiotic xanthogranuloma
- Pilomatricoma
- Reticulohistiocytosis
- Rosai-Dorfman disease
- Ruptured cyst/keratin granuloma
- Sarcoidosis
- Scar
- Suture granuloma
- Granular “material” in cells
- Aluminum chloride (Drysol solution)
- Ferric subsulfate (Monsel solution)
- Granular cell tumor
- Hemosiderin
- Leishmaniasis
- Melanin
- Tattoo
- Hyperkeratosis/parakeratosis
- Actinic keratosis
- Axillary granular parakeratosis
- Bowen disease
- Chondrodermatitis nodularis helicis
- Dermatophytosis
- Discoid lupus erythematosus
- Epidermolytic hyperkeratosis
- Flegel disease
- Ichthyosis vulgaris
- Inflammatory linear verrucous epidermal nevus
- Lichen planus
- Lichen sclerosus
- Nutritional deficiency
- Pityriasis lichenoides et varioliformis acuta
- Pityriasis rubra pilaris
- Porokeratosis
- Tinea versicolor
- see also Parakeratosis
- Interface (lichenoid) change
- Discoid lupus erythematosus
- Halo nevus
- Lichen planus
- Lichen striatus
- Pityriasis lichenoides et varioliformis acuta
- Interface (vacuolar) change
- Erythema multiforme
- Fixed drug reaction
- Graft-versus-host disease
- Lichen sclerosus
- Lichenoid interface change see Interface (lichenoid) change
- Lobular proliferation (proliferation downward from epidermis)
- Inverted follicular keratosis
- Molluscum contagiosum
- Poroma
- Seborrheic keratosis, acanthotic
- Trichilemmoma
- Melanocytes
- Blue nevus
- Blue nevus, cellular
- Deep penetrating nevus
- Intradermal nevus
- Melanoma
- Melanoma, balloon cell
- Melanoma, desmoplastic
- Mongolian spot
- Pigmented spindle cell nevus of Reed
- Recurrent nevus
- Spitz nevus
- Mucin
- Digital mucous cyst
- Focal cutaneous mucinosis
- Follicular mucinosis
- Lichen myxedematosus
- Lupus tumidus
- Neurothekeoma
- Nodular fasciitis
- Pretibial myxedema
- Scleromyxedema
- Mucin and glands or ducts
- Chondroid syringoma
- Mucinous carcinoma
- Mucocele
- “Normal” skin on low power
- Argyria
- Dermatophytosis/tinea versicolor*
- Ichthyosis vulgaris
- Macular amyloidosis* (not pictured)
- Scleredema
- Urticaria
- Vitiligo (not pictured)
- *when subtle
- Palisading reactions
- Gout
- Granuloma annulare
- Necrobiosis lipoidica
- Necrobiotic xanthogranuloma
- Rheumatoid nodule
- Papillary dermal infiltrate see Band-like dermal/papillary dermal infiltrate
- Papillated dermal tumor
- Aggressive digital papillary adenocarcinoma
- Erosive adenomatosis of the nipple (nipple adenoma)
- Hidradenoma papilliferum
- Papillary eccrine adenoma
- Syringocystadenoma papilliferum
- Tubular apocrine adenoma
- Papulosquamous (psoriasiform) change
- Chronic spongiotic dermatitis
- Lichen simplex chronicus
- Pityriasis rubra pilaris
- Psoriasis
- Secondary syphilis
- Parakeratosis
- Psoriasis
- Spongiotic dermatitis
- see also Hyperkeratosis/parakeratosis
- Perivascular infiltrate
- Granuloma annulare
- Gyrate erythema
- Leukocytoclastic vasculitis
- Perniosis
- Pigmented purpuric dermatosis
- Pityriasis rosea
- Polymorphous light eruption
- Pink ball of spindle cells
- Angioleiomyoma
- Myofibroma
- Scar, hypertrophic
- Schwannoma
- Pink dermis
- Lichen sclerosus
- Morphea
- Radiation dermatitis
- Pink material
- Amyloid
- Cryoglobulinemia (type I)
- Erythema elevatum diutinum
- Erythropoietic protoporphyria
- Gout
- Lichen sclerosus
- Lipoid proteinosis
- Pilomatricoma
- Proliferating pilar tumor
- Radiation dermatitis
- Rheumatoid nodule
- Sclerotic fibroma
- Polypoid shape (dome-shaped)
- Accessory digit
- Accessory nipple
- Accessory tragus
- Digital fibrokeratoma
- Fibrous papule
- Intradermal nevus
- Neurofibroma
- Pyogenic granuloma
- Proliferation downward from epidermis see Lobular proliferation
- Pseudoepitheliomatous hyperplasia above abscesses
- Blastomycosis
- Chromomycosis
- Coccidioidomycosis
- Psoriasiform change see Papulosquamous
- Regular epidermal acanthosis see Acanthosis, regular epidermal
- Reticulated epidermal proliferation
- Fibroepithelioma of Pinkus
- Fibrofolliculoma
- Nevus sebaceus of Jadassohn
- Seborrheic keratosis, reticulated
- Syringofibroadenoma
- Tumor of the follicular infundibulum
- Space with a lining
- Apocrine hidrocystoma
- Auricular pseudocyst
- Branchial cleft cyst
- Bronchogenic cyst
- Cutaneous ciliated cyst
- Cutaneous endometriosis
- Dermoid cyst
- Epidermal inclusion cyst
- Glomangioma
- Pilar cyst
- Steatocystoma
- Venous lake
- Spindle cells
- Angioleiomyoma
- Atypical fibroxanthoma
- Blue nevus, cellular
- Dermatofibroma
- Dermatofibrosarcoma protuberans
- Fibrous papule
- Infantile digital fibromatosis
- Kaposi sarcoma
- Leiomyoma
- Melanoma, desmoplastic
- Neurofibroma
- Neurothekeoma
- Nodular fasciitis
- Palisaded encapsulated neuroma
- Scar
- Schwannoma
- Squamous cell carcinoma
- see also Pink ball of spindle cells
- Spongiosis
- Allergic contact dermatitis
- Arthropod bite reaction
- Guttate psoriasis
- Lichen simplex chronicus
- Pityriasis rosea
- Psoriasis
- Square/rectangular shape
- Lichen myxedematosus
- Morphea
- Necrobiosis lipoidica
- Normal back skin
- Radiation dermatitis
- Scleredema
- Scleromyxedema
- Subcutaneous inflammation
- Erythema induratum
- Erythema nodosum
- Lupus profundus
- Polyarteritis nodosa
- Post-steroid panniculitis
- Subcutaneous fat necrosis of newborn
- Subcutaneous T-cell lymphoma
- Subepidermal space/cleft
- Angiokeratoma
- Bullous pemphigoid
- Dermatitis herpetiformis
- Erythema multiforme
- Herpes gestationis
- Lymphangioma
- Pemphigoid gestationis
- Polymorphous light eruption
- Porphyria cutanea tarda
- Sweet syndrome
- Upper epidermal change
- Bowen disease
- Clonal seborrheic keratosis
- Epidermodysplasia verruciformis
- Epidermolytic hyperkeratosis
- Myrmecium
- Orf
- Paget disease
- Verruca plana
- Verruca vulgaris
- Vacuolar interface change see Interface (vacuolar) change
- Vessels, suggestion of see Endothelial cells