Two patients present with asymptomatic red lesions -- a 60-year-old man, whose lesion was present for five years before beginning to bleed, and a 27-year-old man whose lesion doubled in size during a two year period. Can you differentiate between the two?
A 54-year-old nurse and a 26-year old woman both present with bimalar facial rashes caused by two different things. Can you tell the difference?
Two patients present with oval-shaped plaques with central clearing on the trunk. Can you tell the difference?
Two patients present to the dermatology clinic with scaly pruritic lesions on the forearm. Can you differentiate between the two?
A 3-year-old boy and 45-year-old man present separately to the dermatology clinic with similar looking erythematous rashes. Can you differentiate between the two?
Two patients present to the dermatology clinic with pink rashes — one with a hyperpigmented rough patch on the nose, the other with pink papules in a linear pattern on the lateral thigh.
A patient presents with a yellow plaque on her left eyelid and a yellow papule on her left cheek. Are the two related?
A woman presents with papules on the areola that had been enlarging for several months. A man presents with protuberant papules with a red, yellow and whitish hue. Can you differentiate between the two?
Two patients present with newly developed brown papules. The first patient, a 45-year-old man, presented with a new mole that continues to grow and is associated with occasional pruritus and bleeding. The second patient, a 47-year-old man, presented with a 6-month history of a brown, growing "mole." Can you differentiate between the two?
Two patients present with discoloration of the eyelid. The first patient, a black woman aged 65, presents with velvety plaques and skin tags near hear right area that did not itch, burn or hurt. The second, an 8 year old boy with a family history of atopy, presented with eyelid dermatitis. Can you differentiate between the two?
Two patients present with growths on the fingers. The first patient, black woman aged 45 years, presents with papules on the outside of her pinkies that had been present since birth, had not grown and did not bother her. The second, is a man aged 40 years with a six-month history of a growth on the side of one middle finger. Can you differentiate between the two?
Two patients present with red lesions. A white infant aged 4 months presented with a three-month history of a red, verrucous nodule on his scalp, that grew from a small papule to a 3-cm nodule. A white man aged 50 years who had developed red papules on his legs, arms, chest and abdomen 20 years earlier, noticed that a group of the papules grew together to form a plaque. Can you differentiate between these two patients' lesions?
Two patients present with facial pustules, a 35-year-old man and an 18-year old woman. Can you differentiate between these two different dermatologic conditions?
Two patients present with blisters. One has bilateral blister formation on the dorsum of the hands, the other has blisters on the foot, face and diaper regions. Can you differentiate between the two?
Two patients present with hair loss. The first, a 55-year-old gay man presented with patchy-scalp hair loss. The scalp did not itch, burn or hurt, and was not scaly. The other patient, an 8-year-old boy with a several month history of hair loss and palpable lymph nodes. Can you differentiate between the two?
Two patients present with painless annular lesions. One presented to the dermatology clinic with a two-month history of a ringed rash on his abdomen, and the other patient had a three-week history of a slowly enlarging, pruritic rash on his left arm. Can you differentiate between the two?
Two patients present facial rashes. One presented to the dermatology clinic with an eight-month history of an asymptomatic progressive rash on his arms and legs, and the other patient had a history of multiple nonmelanoma skin cancers presented with asymptomatic scaly lesions on his hands, arms, and head. Can you differentiate between the two?
Two patients present with similar hyperpigmented spots on the skin — one with a series of macules on the cheek, and the other with lesions on his back.
A 42-year-old man presented with abnormally thick skin of the palms.
A woman aged 34 years was referred for treatment of a recurrent, painful, nonhealing ulcer of six months' duration on her left hand.
Two patients present with scaly papules. One presented to the dermatology clinic with an eight-month history of an asymptomatic progressive rash on his arms and legs, and the other patient had a history of multiple nonmelanoma skin cancers with asymptomatic scaly lesions on his hands, arms and head.
A 10-year-old boy referred by his pediatrician presented with a six-week history of a scaly scalp lesion.
A 28-year-old woman presents with a burning rash on her palms and arms. The rash appeared abruptly two days earlier along with numerous flat, pinkish-red lesions.
A Hispanic man age 23 years presented with a nine-month history of a nonhealing ulcer of his cheek. The erosion began as a small, painless erosion and had gradually enlarged.
A 35-year-old white woman presented with grouped vesicles and superficial crusting on both lips and grouped erosions on the gingiva and hard palate.
Two patients present with insect bites — one after walking in brush while vacationing and another after doing yard work. Can you differentiate between the two?
Asymptomatic erythematous papules on the arms, trunk, and neck are first thought to be insect bites in a man with weight loss, fatigue, and dyspnea.
A man taking an alternative medical treatment for periodontal disease presents with a history of skin discoloration.
Two patients present with dystrophies of the nail—one with a several-year history of yellowed toenails and the other with grooved thumbnails.
Two women present with similar red lesions on the extremities—one thought she had ringworm, and the other became severely ill after getting several vaccinations.
To combat cold temperatures at work, a woman kept a small heater under her desk. This led to netlike erythema on both lower legs.
A man presents with a six-month history of oral lesions that led to blistering and ulceration following intense sun exposure.
Two patients present with similar cutaneous growths—one a series of ulcerative lesions on the lower leg, and the other a painless forearm lesion.
One month after starting a new chemotherapeutic drug, the patient sought treatment for painful peeling and redness on her hands and feet.
A woman presents with a painful rash that developed immediately after exposure to water or sweating and disappeared an hour after drying.
Two boys with similar patches of hair loss—one developed six months ago, and the other had been present since birth.
A restaurant employee's intensely itching and burning hand lesions worsened after he was assigned to work in the kitchen.
For two years, a woman had lived with an itchy rash on her axillae and neck that became more symptomatic during the summer.
Two patients with enlarging lesions—one in a man with no history of skin cancer, and the other in a man with significant actinic damage
After four days with a high fever, cough, and conjunctivitis, a child is brought to the hospital with an extensive, maculopapular rash.
Five months of treatment with corticosteroids and antibiotics did not relieve the scaly rash on a man's scalp, cheeks, trunk, genitals, and legs.
Two patients present with leg rashes. One rash developed after a woman started taking cefazolin, and the other featured the deposition of hemosiderin.
A woman with no history of sexually transmitted diseases suffers intense vulvar itching. Hypopigmentation was noted with no erosions or papules.
A middle-aged woman with Graves' disease presented with asymptomatic, firm, nonpitting, flesh-colored nodules and plaques on her legs and feet.
Two young girls with hypopigmented patches—one on the right buttock, the other on the knees, fingers, and ankles.
Six weeks after it appeared, the small red bump on this man's right forearm had become an erythematous crater-shaped nodule
A woman with a history of type 2 diabetes presented with asymptomatic, shiny, waxy, round patches on her shins that turned from red to yellow.
Plaques develop on the face, trunk, and hands of a man with hepatitis C.
A 62-year-old man with a painful erythematous rash on the shins
Two patients with purple lesions and no other abnormal skin findings.
Two patients with erythematous trunk plaques—the first developed eight months earlier, and the other 15 years ago.
A man presents with complaints of itchy and uncomfortable red bumps on his skin at sites of pressure. The lesions typically dissipated after one hour.
A woman develops severe itching and burning two days after application of topical bacitracin and a compression bandage to a venous stasis ulcer.
Two patients present with similar vesiculobullous eruptions. One was preceded by painful mouth sores, the other had no oral involvement.
After moving to Colorado, a woman notices painful blue discoloration of her fingers on exposure to the cold.
Fearing a bacterial infection, a teenager seeks treatment for white facial patches.
Sun exposure is the common link between these two conditions. Can you tell them apart?
Intermittent itching accompanies a persistent leg plaque.
For three years, the patient lived with an enlarging painless ulcer on the sole of his foot. The lesion occasionally drained liquid but never became red or tender.
The asymptomatic rash on a young woman's chest and back appeared to be spreading. Hyperpigmented papules had become larger verrucous plaques.
Two women present with growing scalp nodules. One patient reported recent unintentional weight loss.
Can you distinguish between two purpuric plaques on patients' legs?
The patient is concerned about a recent increase in his foul-smelling tongue discoloration.
Blue markings on the arm and leg of a newborn were first thought to be bruises from a traumatic delivery.
Numerous red target lesions develop on the extremities of a young woman being treated for acne.
Two men present with red rashes—one started on the back and spread to the upper arms, and the other was limited to the chest.
Two aging men develop similar-appearing asymptomatic facial plaques.
Peeling originating on the fingertips progresses to the palms of an African-American teenager following a 10-day course of ciprofloxacin.
One month after a painful neck rash, an HIV-positive man develops pruritic purple lesions at the same site.
An itchy rash is accompanied by facial edema in a young girl with a past history of osteomyelitis.
A 40-year-old woman and a 3-year-old boy experience similar patterns of hair loss—one of sudden onset and the other present at birth.
Skin-colored papules develop on the axillae of an African-American woman.
A patient seeks treatment for trauma-induced blistering and scarring.
Differentiating two similar-appearing cases of axillary papules and plaques
Linear leg lesions that "move"
Two women, the first bedridden with high fever and the second otherwise healthy, present with a vesicular rash.
Two men present with cutaneous heel lesions. Similar growths appear on the patients' hands as well.
Can you distinguish between these two facial lesions with similar characteristics?
An asthmatic woman experiences a recalcitrant burning facial rash that spares the lips.
A black boy with a family history of pigmentary problems presents with white patches on his trunk and legs.
A girl was brought by her mother to the dermatology clinic with a two-week history of a scaly rash.
Two men with papules on the nose, cheeks, and forehead.
Painful lesions on a man's axilla and groin and a woman's breast. Can you guess the correct diagnosis?
A young woman is concerned about multiple smooth bumps on her face.
A man complained of mild-to-moderate sensitivity in his lower incisor whenever he chewed for the past year. Four months ago, a painful tender swelling developed on his chin.
A man presented with a one-year history of progressive bilateral swelling and recurrent infections of the lower extremities. Maggots were observed in the skin crevices.
Two elderly men present with painful red rashes on their feet and lower leg. One patient had a history of gout, the other essential thrombocytosis.
Were an African-American man's scalp bumps caused by his barber?
An 18-year-old student and a 72-year-old woman bear similar pedal lesions that interfere with walking.
A man with a history of chest pain, light-headedness, and diaphoresis noted a bruise that had appeared spontaneously on his chest.
A woman has had discrete yellow areas on her eyelids for several years. During that time, the lesions had been slowly expanding.
A 58-year-old African-American man was alarmed to find that his freshly shaved scalp had many "ridges and valleys."
One man had a nodule on his palm, and another had one on his leg. Both lesions were painless, but the diagnoses were very different.
A 70-year-old white woman presented with a "mole" that had been growing on her right cheek for the past five years.
A 35-year-old Caucasian woman with diabetes mellitus was referred to us for evaluation and assessment of a slowly enlarging lesion that had first appeared on her hand eight weeks earlier.
Two women with considerable comorbidities present with lower leg trouble.
Asymptomatic hyperkeratotic papules affect two women.
Two cases of neck plaques—one that gets more pruritic at night and one that worsens after a visit to the barber.
A 17-year-old female developed diffuse blue-gray pigmentation of both shins over a two-month period.
A 54-year-old man complained of fevers and abdominal pain. Four days earlier, he had noted intense left upper-quadrant abdominal pain that was worse with inspiration and a throbbing pain in the distal left fifth digit.