June 12, 2012
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?
May 15, 2012
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?
April 11, 2012
Two patients present with oval-shaped plaques with central clearing on the trunk. Can you tell the difference?
March 13, 2012
Two patients present to the dermatology clinic with scaly pruritic lesions on the forearm. Can you differentiate between the two?
February 14, 2012
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?
January 10, 2012
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.
December 13, 2011
A patient presents with a yellow plaque on her left eyelid and a yellow papule on her left cheek. Are the two related?
November 09, 2011
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?
October 12, 2011
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?
September 12, 2011
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?
August 09, 2011
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?
July 12, 2011
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?
June 08, 2011
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?
May 10, 2011
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?
April 13, 2011
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?
March 08, 2011
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?
February 01, 2011
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?
January 11, 2011
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.
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.
November 05, 2010
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?
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.
August 01, 2010
Two patients present with similar cutaneous growths—one a series of ulcerative lesions on the lower leg, and the other a painless forearm lesion.
July 01, 2010
Two boys with similar patches of hair loss—one developed six months ago, and the other had been present since birth.
June 01, 2010
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
Two patients present with leg rashes. One rash developed after a woman started taking cefazolin, and the other featured the deposition of hemosiderin.
Two young girls with hypopigmented patches—one on the right buttock, the other on the knees, fingers, and ankles.
March 01, 2010
Two patients with purple lesions and no other abnormal skin findings.
February 04, 2010
Two patients with erythematous trunk plaques—the first developed eight months earlier, and the other 15 years ago.
Two patients present with similar vesiculobullous eruptions. One was preceded by painful mouth sores, the other had no oral involvement.
Sun exposure is the common link between these two conditions. Can you tell them apart?
Two women present with growing scalp nodules. One patient reported recent unintentional weight loss.
Can you distinguish between two purpuric plaques on patients' legs?
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.
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.
Differentiating two similar-appearing cases of axillary papules and plaques
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.
August 10, 2009
Can you distinguish between these two facial lesions with similar characteristics?
July 14, 2009
Painful lesions on a man's axilla and groin and a woman's breast. Can you guess the correct diagnosis?
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.
June 11, 2009
An 18-year-old student and a 72-year-old woman bear similar pedal lesions that interfere with walking.
May 11, 2009
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.
April 30, 2009
Two women with considerable comorbidities present with lower leg trouble.
Two cases of neck plaques—one that gets more pruritic at night and one that worsens after a visit to the barber.
Two patients presented with similar multiple moles on the extremities and torso. Can you tell which case was mild and which was severe?
