The American Society of Dermatopathology

Case Study Archives

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70-year-old with rubbery mass on lower back

Asymptomatic nodule on a 55-year old male

Asymptomatic red nodule on the posterior auricular scalp

Painless pink nodule on a thigh of a 94-year-old man

Sweat gland tumors
19-year-old male with a left leg lesion
Asymptomatic nodule of the lower eyelid
Asymptomatic nodule on the finger

Fibrous tumors
45-year-old female with a finger mass (with zoomable virtual slide)
A 24-year-old African American male with a firm, non-painful nodule on the shoulder
A 79-year-old-male with a "lump" on the thigh
An Infantile Scalp Mass (with zoomable virtual slide)
Back Mass, Elderly Male
Erythematous Lesion on the Back
Four-year-old with a flank mass
Grouped red-brown papules on the left dorsal hand
Mass on the foot of a 5-year-old girl
Nail bed lesion
Painless periorbital mass
Subcutaneous mass in a healthy infant
Upper thigh nodule in a 13-year-old girl

Neural tumors
Stable nodular lesion on the midline lower back (with zoomable virtual slide)

Vascular tumors
85-year-old man with small pink papule
A slowly growing red nodule on the hand
Back Nodule
Mobile subcutaneous nodule on the thigh of a 29-year-old male

Other tumors
Multiple skeletal fractures and asymptomatic foot nodule (with zoomable virtual slide)
Solitary mass on the right thigh of an adolescent
Solitary nodular lesion on left leg
Subcutaneous nodule on the neck
Vulvar mass

Undifferentiated tumors
8-year-old boy with subcutaneous nodule of the upper arm

Melanocytic tumors
An 80-year-old male with a mass on the upper lip
Flesh colored papule on the neck of a 46-year-old male
Speckled pigmented patch

Erythematous plaque on chest of 62-year-old female

A 48-year-old female with a flesh-colored papule on the face
A verrucous plaque on the wrist
Asymptomatic hyperkeratotic papule of the left forearm

A 68-year-old female with 10 x 10 cm thigh mass
Enlarging vulvar growth in a 51-year-old female


Thirty-two-year-old female with intermittent pain of the umbilicus

70-year-old man with a scaly erythematous eruption

44-year-old with diffuse outbreak of blistering rash
Painful mucocutaneous eruption in a middle-aged man

Granulomatous or Histiocytic
70-year-old man with a scrotal papule

Other inflammatory
A 72-year-old male with a red papule on the upper back
An Erythematous, Friable, Pedunculated Papule on the Abdomen


23-year-old immunocompromised female with asymptomatic dermal plaque on proximal thigh

A 79-year-old-male with a "lump" on the thigh

Asymptomatic penile ulcer

Indurated plaque on the right upper extremity

Bacterial and spirochetal
A 25-year-old male with a painful nodule in the perianal region
Eschar on the leg of a 56-year-old woman
Wrist nodule on a 74-year-old man

Hemorrhagic lesions in a female with systemic lupus erythematosus
Pustular Dermatitis

Protozoa, helminth, marine and other infestations
Crusted plaque on the cheek of a medical student

27-year-old woman with several macules on the chest and neck


10-year-old with morbilliform rash

47-year-old male with anosacral plaque

62-year-old with patches on the knee

A 2-year-old girl with verrucous papules

A 63-year-old woman with an enlarging erythematous plaque on the forearm (with zoomable virtual slide)

A persistent gluteal plaque

Asymptomatic skin colored papules in a patient with rheumatoid arthritis

Enlarging right thigh mass in a morbidly obese patient

Multiple small yellow papules on the left lower neck


Diffuse dry, scaly skin with occasional blisters

Follicular neoplasm

66-year-old female with a scalp nodule

A slowly enlarging pearly papule

Autoimmune disorder

60-year-old male with a slowly growing subcutaneous nodule on the leg for six months

Fibrous tumors
A 31-year-old presents with a papule on the nasal bridge

Vascular tumors
Eyebrow mass in a 55-year-old male
Nodule on the scalp of a 76-year-old male

Lymphomatous infiltrates
Asymptomatic ecchymotic plaques on the chest

Intertriginous Lesions
Nine-month-old female with pruritic blistering


60-year-old male with a slowly growing subcutaneous nodule on the leg for six months

A 2-year-old girl with verrucous papules

A 31-year-old presents with a papule on the nasal bridge

A 34-year-old female with a slowly enlarging yellow plaque on her left lower abdomen

A mass in the breast of a 34-year-old female

Back Mass, Elderly Male

Tender nodule on left calf of a 48-year-old-male

Fibrous tumors
An 11-year-old healthy male with an asymptomatic nodule on the scalp
Solitary nodule on the left calf of an elderly male

A 34-year-old female with a slowly enlarging yellow plaque on her left lower abdomen


90-year-old female with breast erythema and axillary lymphadenopathy


An Asymptomatic Mass on the Wrist of a 44-year-old Female