The American Society of Dermatopathology

Case Study Archives

Please note that some of the zoomable images are currently unavailable. We are working to correct it as soon as possible. Cases are archived by topic, date and diagnosis.

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53-year-old woman with a lesion on the left wrist

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
74-year-old male with a nodule on dorsal foot
Asymptomatic nodule of the lower eyelid
Asymptomatic nodule on the finger
Painless unilateral eyelid swelling
Vascular papule on neck of a 79-year-old woman

Fibrous tumors
28-year-old man with an arm mass
45-year-old female with a finger mass (with zoomable virtual slide)
‎47-year-old male with a finger mass
‎56-year-old female with nasal papule‎
A 24-year-old African American male with a firm, non-painful nodule on the shoulder
A 6-month-old female with a finger mass
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
57-year-old woman with a pretibial nodule
A 69-year-old man presented with a tender papule on his neck ‎
Stable nodular lesion on the midline lower back (with zoomable virtual slide)

Vascular tumors
‎28-year-old male with a painful pink papule
‎29-year-old immunocompromised man with subcutaneous nodules
32-year-old woman with a red papule on the abdomen
85-year-old man with small pink papule
A 61-year-old female with a verrucous lesion on the calf
A slowly growing red nodule on the hand
Back Nodule
Mobile subcutaneous nodule on the thigh of a 29-year-old male
Multinodular plaque on the scalp of a 60-year-old male ‎
Suspected Ingrown Toenail in a 17-year-old Patient

Other tumors
51-year-old man with a rapidly growing, thickened fingernail
An 80-year-old man with a lesion on his left lower leg
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 70-year-old man with a nodular lesion on the right auricle
A verrucous plaque on the wrist
Asymptomatic hyperkeratotic papule of the left forearm
Asymptomatic linear cluster of papules on the back of a 72-year-old female

A 68-year-old female with 10 x 10 cm thigh mass
Enlarging vulvar growth in a 51-year-old female
Small Finger Mass on a 44-Year-Old Male

‎60-year-old woman with a tender, rapidly growing nodule

80-year-old with painful chest nodule

75-year-old man with an eroded plaque on the back


66-year-old male with firm plaques on the trunk and extremities

Numerous monomorphic discrete red-brown macules and papules on the trunk and extremities of a 47-year-old male.

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

71-year-old female with linear, pruritic, hyperpigmented papules on her arm

70-year-old man with a scaly erythematous eruption

44-year-old with diffuse outbreak of blistering rash
A 53-year-old male with multiple blisters on hands and forearms
Painful mucocutaneous eruption in a middle-aged man

Granulomatous or Histiocytic
70-year-old man with a scrotal papule
86-year-old woman with a reticular rash
A progressively enlarging nodule on the face of a 32-year-old female

Isolated Painless Left Hip Plaque ‎

Other inflammatory
54-year-old man with arthralgia, weight loss, fever and rash
A 72-year-old male with a red papule on the upper back
An Erythematous, Friable, Pedunculated Papule on the Abdomen
Infant with a papular rash

21-month-old male with chest nodule and scalp patch


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
23-year-old female with tender erythematous nodules over the medial thighs and volar forearms
A 25-year-old male with a painful nodule in the perianal region
A 59-year-old man presented with a history of a rash on his torso and upper extremities
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

45-year-old female with multiple papular lesions on the vulva

47-year-old male with anosacral plaque

‎55-year-old woman with rash ‎

62-year-old with patches on the knee

‎72-Year-Old Man with Papule of Medial Eye

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

Mass of the Shoulder

Multiple small yellow papules on the left lower neck

Vascular papule on neck of a 79-year-old woman

Collagen and elastin disorders
A 58-year-old man with multiple asymptomatic, slightly indurated thin plaques
Mass of the Shoulder


53-year-old woman with yellow papules

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

53-year-old woman with a lesion on the left wrist


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

An enlarging right arm mass in a 7-month-old male

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

A 75-year-old male with violaceous papules and nodules on the torso and face.

Erythematous plaque on the shoulder of a 67-year-old male


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


49-year-old man with a patch of alopecia

Hair breakage in a 38-year-old patient

Numerous monomorphic discrete red-brown macules and papules on the trunk and extremities of a 47-year-old male.

Cysts, Sinuses and Pits

‎74-year-old woman with a subcutaneous nodule at the left angle of the jaw‎

Vascular disease

‎55-year-old woman with rash ‎

63-year-old woman with a painful, retiform plaque of the lower extremity

Violaceous nodules on the extensor elbow of an adult female

Cutaneous Deposits

A Painful Indurated Plaque on the Shin

‎58-year-old man with a clinical impression of a neoplasm

Disorders of epidermal maturation and keratinization

74-year-old woman with spiny patch