- Acantholysis
- Accessory digit
- Accessory nipple
- Accessory tragus
- Acne keloidalis
- Acral skin
- Actinic keratosis
- Adenoid cystic carcinoma
- Adipocytic tumors
- Adnexal carcinoma, microcystic
- Aggressive digital papillary adenocarcinoma
- Allergic contact dermatitis
- Aluminum chloride (Drysol solution)
- Amyloid
- Amyloidosis, macular (not pictured)
- Amyloidosis, nodular
- Angiokeratoma
- Angioleiomyoma
- Angiolipoma
- Angiolymphoid hyperplasia with eosinophilia
- Angiosarcoma
- Apocrine adenoma, tubular
- Apocrine gland and duct
- Apocrine hidrocystoma
- Argyria
- Arthropod bite reaction
- Aspergillosis
- Atypical fibroxanthoma
- Auricular pseudocyst
- Axillary granular parakeratosis
- Axillary skin
- Bacillary angiomatosis
- Back skin, normal
- Balanitis circumscripta plasmacellularis
- Basal cell carcinoma
- Basal cell carcinoma, morpheaform
- Benign tumors
- Blastomycosis
- Blue nevus
- Blue nevus, cellular
- Blue nevus, hypopigmented
- Bowen disease
- Branchial cleft cyst
- Breast carcinoma, metastatic see Metastatic breast carcinoma
- Bronchogenic cysts (not pictured)
- Bullous pemphigoid
- Burn
- Calcinosis cutis
- Carcinoma en cuirasse, breast (metastatic breast carcinoma, interstitial pattern)
- Cholesterolosis, extracellular (erythema elevatum diutinum)
- Chondrodermatitis nodularis helicis
- Chondroid syringoma
- Chromomycosis
- Chronic spongiotic dermatitis
- Ciliated cyst, cutaneous
- Clear cell acanthoma
- Clonal seborrheic keratosis
- Coccidioidomycosis
- Cryoglobulinemia (type I)
- Cryptococcosis, gelatinous
- Cylindroma
- Darier disease
- Deep penetrating nevus
- Dermal filler (hyaluronic acid)
- Dermatitis herpetiformis
- Dermatofibroma
- Dermatofibroma, hemosiderotic
- Dermatofibrosarcoma protuberans
- Dermatophytosis
- Dermoid cyst
- Desmoplastic trichoepithelioma
- Digit, accessory
- Digital fibrokeratoma
- Digital mucous cyst
- Digital papillary adenocarcinoma, aggressive
- Dilated pore of Winer
- Discoid lupus erythematosus
- Drysol solution (aluminum chloride)
- Eccrine adenoma, papillary
- Eccrine gland and duct
- Elastosis perforans serpiginosa
- Endometriosis, cutaneous
- Endothelial cells
- Eosinophils
- Epidermal inclusion cyst
- Epidermodysplasia verruciformis
- Epidermolytic hyperkeratosis
- Erosive adenomatosis of the nipple
- Erythema elevatum diutinum
- Erythema induratum
- Erythema multiforme
- Erythema nodosum
- Erythropoietic protoporphyria
- Eyelid skin
- Ferric subsulfate (Monsel solution)
- Fibroblasts
- Fibroepithelioma of Pinkus
- Fibrofolliculoma
- Fibrous papule
- Fibroxanthoma, atypical
- Fixed drug reaction
- Flegel disease
- Florid papillomatosis (erosive adenomatosis) of the nipple
- Focal cutaneous mucinosis
- Follicular infundibulum, tumor of
- Follicular mucinosis
- Gel foam
- Giant cells
- Giant cell tumor of tendon sheath
- Glomangioma
- Glomus tumor
- Gout
- Graft-versus-host disease
- Granular cell tumor
- Granuloma annulare
- Granuloma faciale
- Grover disease
- Guttate psoriasis (not pictured)
- Gyrate erythema
- Hailey-Hailey disease
- Hair follicles
- Halo nevus
- Hemangioma, infantile
- Hemangioma, targetoid
- Hemosiderin
- Herpes (pemphigoid) gestationis
- Herpes simplex virus infection
- Hibernoma
- Hidradenoma, nodular
- Hidradenoma papilliferum
- Histiocytes
- Histoplasmosis
- Hyaluronic acid (dermal filler)
- Ichthyosis vulgaris
- Incontinentia pigmenti
- Infantile digital fibromatosis
- Infantile hemangioma
- Inflammatory cells
- Inflammatory disorders
- Inflammatory linear verrucous epidermal nevus
- Interface (lichenoid) change
- Interface (vacuolar) change
- Interstitial inflammation
- Intradermal nevus
- Inverted follicular keratosis
- Kaposi sarcoma
- Kaposi sarcoma, nodular
- Kaposi sarcoma, patch/plaque
- Keratin granuloma
- Keratinocytic tumors
- Langerhans cell histiocytosis
- Leiomyoma
- Leishmaniasis
- Lepromatous leprosy
- Leukemia
- Leukocytoclastic vasculitis
- Lichen myxedematosus (not pictured)
- Lichen nitidus
- Lichenoid drug reactions (not pictured)
- Lichenoid interface change
- Lichenoid keratosis, benign (not pictured)
- Lichen planus
- Lichen sclerosus et atrophicus
- Lichen simplex chronicus
- Lichen striatus
- Lip
- Lipodermatosclerosis
- Lipoid proteinosis
- Lipoma
- Lupus profundus
- Lupus tumidus
- Lymphangioma
- Lymphocytes
- Lymphoma
- Malignant tumors
- Mastocytoma
- Mastocytosis
- Meissner's corpuscles
- Melanin
- Melanocytic tumors
- Melanoma
- Melanoma, balloon cell
- Melanoma, desmoplastic
- Melanoma cells, malignant
- Merkel cell carcinoma
- Metastatic breast carcinoma
- Metastatic breast carcinoma, interstitial pattern
- Microcystic adnexal carcinoma
- Molluscum contagiosum
- Mongolian spot
- Monsel solution (ferric subsulfate)
- Morphea
- Morpheaform basal cell carcinoma
- Mucinous carcinoma
- Mucocele
- Mycosis fungoides
- Myofibroma
- Myrmecium
- Necrobiosis lipoidica
- Necrobiotic xanthogranuloma
- Nephrogenic systemic fibrosis (not pictured)
- Neural cells
- Neurilemmoma see Schwannoma
- Neurofibroma
- Neuroma, palisaded encapsulated
- Neurothekeoma
- Neutrophils
- Nevomelanocytes, benign
- Nevus sebaceus of Jadassohn
- Newborn, subcutaneous fat necrosis of
- Nipple, accessory
- Nipple adenoma
- Nodular fasciitis
- Nodular hidradenoma
- Nodular inflammation
- “Normal” appearing skin
- Nutritional deficiency
- Ochronosis
- Orf
- Osteoma cutis
- Pacinian corpuscles
- Paget disease
- Palisaded encapsulated neuroma
- Pancreatic fat necrosis
- Papillary eccrine adenoma
- Papulosquamous changes
- Paracoccidioidomycosis (not pictured)
- Paraffinoma
- Parakeratosis
- Pemphigoid (herpes) gestationis
- Pemphigus foliaceus
- Pemphigus vegetans
- Pemphigus vulgaris
- Perifollicular inflammation
- Perivascular inflammation
- Perniosis
- Pigmented purpuric dermatosis
- Pigmented spindle cell nevus of Reed
- Pilar cyst
- Pilar sheath acanthoma
- Pilomatricoma
- Pityriasis lichenoides et varioliformis acuta
- Pityriasis rosea
- Pityriasis rubra pilaris
- Plasma cells
- Polyarteritis nodosa
- Polymorphous light eruption
- Porokeratosis
- Poroma
- Porphyria cutanea tarda
- Pretibial myxedema
- Proliferating pilar tumor
- Pseudoxanthoma elasticum
- Psoriasis
- Pyogenic granuloma
- Radiation dermatitis
- Rash
- Reactive perforating collagenosis
- Recurrent nevus
- Renal cell carcinoma
- Reticulohistiocytosis
- Rheumatoid nodule
- Rosai-Dorfman disease
- Ruptured cyst
- Sarcoidosis
- Scabies
- Scar
- Scar, hypertrophic
- Schwannoma
- Scleredema
- Sclerema neonatorum (not pictured)
- Scleromyxedema
- Sclerotic fibroma
- Sebaceoma (sebaceous epithelioma)
- Sebaceous adenoma
- Sebaceous carcinoma
- Sebocytes
- Seborrheic keratosis, acanthotic
- Seborrheic keratosis, clonal
- Seborrheic keratosis, reticulated
- Smooth muscle tumors
- Spiradenoma
- Spitz nevus
- Spongiosis
- Spongiotic dermatitis
- Sporotrichosis (not pictured)
- Squamous cell carcinoma
- Stasis dermatitis
- Steatocystoma
- Subcutaneous fat necrosis of newborn
- Subcutaneous inflammation
- Subcutaneous T-cell lymphoma
- Suture granuloma
- Sweet syndrome
- Syphilis, secondary
- Syringocystadenoma papilliferum
- Syringofibroadenoma
- Syringoma
- Targetoid hemosiderotic hemangioma
- Tattoo
- Tinea versicolor
- Tragus, accessory
- Trichilemmoma
- Trichoadenoma
- Trichoblastoma
- Trichoepithelioma
- Trichoepithelioma, desmoplastic
- Trichofolliculoma
- Tuberculosis verrucosa cutis (not pictured)
- Tubular apocrine adenoma
- Tufted angioma
- Tumor of the follicular infundibulum
- Tumors
- Vacuolar interface change
- Venous lakes (not pictured)
- Verruca plana
- Verruca vulgaris
- Vitiligo (not pictured)
- Xanthelasma
- Xanthogranuloma
- Xanthogranuloma, juvenile
- Xanthogranuloma, necrobiotic
- Xanthoma