Derm Dx: Asymptomatic Blisters on a Child's Upper Leg

Derm Dx: Asymptomatic Blisters on a Child's Upper Leg

A 7-year-old boy presents with new-onset, asymptomatic blisters on his upper thigh.

Derm Dx: Swelling in the Finger Following a Cat Scratch

Derm Dx: Swelling in the Finger Following a Cat Scratch

A 61-year-old woman presents with swelling in her finger after experiencing a cat scratch that resulted in bleeding 5 days ...

Derm Dx: Hyperpigmented Macule on the Abdomen

Derm Dx: Hyperpigmented Macule on the Abdomen

An 11-year-old adolescent presents with acne on her face and back as well as a sizable hyperpigmented macule on her ...

Derm Dx: Asymptomatic Blisters on the Hands, Arms, and Feet

Derm Dx: Asymptomatic Blisters on the Hands, Arms, and Feet

A 26-year-old man presents with asymptomatic blisters on his hands, arms, and feet that have been present for 4 days. ...

Derm Dx: Erythematous Rash on the Upper Back

Derm Dx: Erythematous Rash on the Upper Back

A 32-year-old man presents with an erythematous rash on his upper back that has been present for approximately 2 months. ...

Derm Dx: Asymptomatic Lesion Above the Left Eye

Derm Dx: Asymptomatic Lesion Above the Left Eye

A 36-year-old woman presents with a lesion above her left eye that has gradually increased in size over the past ...

Derm Dx: Rash on the Abdomen and Upper Arms

Derm Dx: Rash on the Abdomen and Upper Arms

A 75-year-old, obese woman presents with an asymptomatic rash affecting her abdomen and upper arms that has been present for ...

Derm Dx: Itchy Lesion on the Chest

Derm Dx: Itchy Lesion on the Chest

A 66-year-old man presents with a growth on his chest that has been present for several months. The lesion does ...

Derm Dx: A Bleeding Mole on the Forehead

Derm Dx: A Bleeding Mole on the Forehead

A 34-year-old woman presents with a bleeding mole situated on her upper forehead that has been present for approximately 3 ...

Derm Dx: Rash on the Lower Abdomen and Groin

Derm Dx: Rash on the Lower Abdomen and Groin

A 56-year-old overweight woman presents with a rash affecting her lower abdomen and groin that has been present for 1 ...

Derm Dx: Growth on the Left Index Finger

Derm Dx: Growth on the Left Index Finger

A 58-year-old man presents with a mass on his index finger that only recently became bothersome after increasing in size ...

Derm Dx: Flesh-Colored Growth on the Cheek

Derm Dx: Flesh-Colored Growth on the Cheek

A 75-year-old man presents with a flesh-colored, asymptomatic growth on his right cheek that has persisted for 2 years.

Derm Dx: Dark Spots on the Arms

Derm Dx: Dark Spots on the Arms

A 57-year-old woman presents with dark spots on her arms that have persisted for several months.

Derm Dx: Asymptomatic Genital Rash

Derm Dx: Asymptomatic Genital Rash

A 65-year-old man presents with an asymptomatic rash on his penis. He denies any recent sexual activity, commencement of new ...

Derm Dx: Flesh-Colored Nodule in the Left Medial Canthus

Derm Dx: Flesh-Colored Nodule in the Left Medial Canthus

A 66-year-old woman presents with a flesh-colored nodule in the left medial canthus that had been previously removed but has ...

Derm Dx: Asymptomatic Lesion on the Forearm

Derm Dx: Asymptomatic Lesion on the Forearm

A 52-year-old man presents with a growing lesion on his right forearm that has developed following prolonged sun exposure.

Derm Dx: Rash on the Cheek and Scalp

Derm Dx: Rash on the Cheek and Scalp

A 24-year-old man presents to his clinician with acute-onset rash that developed on his left cheek and scalp.

Derm Dx: Dermatitis on the Torso of a Baseball Player

Derm Dx: Dermatitis on the Torso of a Baseball Player

A 21-year-old baseball player presents for evaluation of multiple erythematous papules and occasional pustules on his chest and back.

Derm Dx: Flesh-Colored Papule With Pigmented Speckles

Derm Dx: Flesh-Colored Papule With Pigmented Speckles

A 70-year-old woman presents for evaluation of an asymptomatic growth on her right wrist.

Derm Dx: Coarse Hairs on the Lower Extremity

Derm Dx: Coarse Hairs on the Lower Extremity

A 30-year-old Hispanic man requests laser removal of cosmetically bothersome coarse hairs on his lower extremity.

Derm Dx: Pigmented Area in the Nail of the Hallux

Derm Dx: Pigmented Area in the Nail of the Hallux

A 42-year-old avid tennis player is referred by his primary care provider for evaluation of a pigmented area on his ...

Derm Dx: A growth on the scalp in an elderly man

Derm Dx: A growth on the scalp in an elderly man

A 91-year-old man is referred by his barber for assessment of a growth on his scalp. Although he had ...

Derm Dx: A moderately itchy rash on the neck and cheek

Derm Dx: A moderately itchy rash on the neck and cheek

A 56-year-old Hispanic man presents with a moderately itchy rash affecting his neck and lower cheek. Despite treatment with various ...

Derm Dx: Abrupt onset of hair loss

Derm Dx: Abrupt onset of hair loss

A 63-year-old Hispanic woman presents with an abrupt onset of hair loss, first noted 6 weeks ago. Examination reveals diffuse ...

Derm Dx: A growth on the armpit

Derm Dx: A growth on the armpit

The patient is a 42-year-old man requesting removal of a growth located on his right armpit. He is moderately obese ...

Derm Dx: A rapidly spreading rash and fever

Derm Dx: A rapidly spreading rash and fever

A 44-year-old Hispanic man presents for evaluation of a rash of 2 days’ duration. Lesions originated on his face and ...

Derm Dx: A sudden, blistering rash

Derm Dx: A sudden, blistering rash

A 47-year-old man presents for evaluation of a rash. The rash developed 24 hours after perioperative administration of vancomycin following ...

Derm Dx: A lesion on the cheek from shaving

Derm Dx: A lesion on the cheek from shaving

An 84-year-old man requests removal of a lesion on his cheek due to chronic irritation from shaving. The growth has ...

Derm Dx: Pain at the base of a fingernail

Derm Dx: Pain at the base of a fingernail

The patient is a 52-year-old woman who complains of pain at the base of a fingernail. The condition was first ...

Derm Dx: An itchy rash on the hands

Derm Dx: An itchy rash on the hands

The patient is a 62-year-old Hispanic woman seeking treatment for an itchy rash affecting both hands. The dermatitis is of ...

Derm Dx: Xerosis with a fish scale pattern

Derm Dx: Xerosis with a fish scale pattern

A 60-year-old man requests consultation for severely dry skin. Examination reveals marked xerosis with a fish scale pattern of both ...

Derm Dx: A large lesion on the thumb

Derm Dx: A large lesion on the thumb

A 74-year-old woman presents for treatment of a bothersome lesion on her thumb. A flesh-colored, semitranslucent nodule is noted between ...

Derm Dx: A large mass on the scalp

Derm Dx: A large mass on the scalp

A 40-year-old African American man presents for evaluation of a mass affecting his posterior scalp, which has enlarged in size ...

Derm Dx: A dome-shaped growth on the upper thigh

Derm Dx: A dome-shaped growth on the upper thigh

The patient is a 57-year-old man requesting removal of a growth on his left upper thigh. The lesion has been ...

Derm Dx: A sudden, blotchy rash on the cheeks

Derm Dx: A sudden, blotchy rash on the cheeks

The patient is an 18-month-old child who presents for evaluation of a rash affecting both cheeks. The onset was sudden ...

Derm Dx: Elastic skin and scattered scars

Derm Dx: Elastic skin and scattered scars

A 10-year-old boy presents for evaluation of scattered scars on his ankles and back, which are slightly atrophic and violaceous. ...

Derm Dx: Dark areas on a teenager's trunk

Derm Dx: Dark areas on a teenager's trunk

A 14-year-old moderately obese Hispanic female is concerned about dark areas on her trunk, which are asymptomatic but unsightly.

Derm Dx: A growth behind the ear with straw-colored fluid

Derm Dx: A growth behind the ear with straw-colored fluid

A 25-year-old woman presents for evaluation of a growth behind her right ear. The lesion was first noted several weeks ...

Derm Dx: A cluster of moles on a man's back

Derm Dx: A cluster of moles on a man's back

A 35-year-old man has a family history of skin cancer and requests a full body examination. His wife is especially ...

Derm Dx: A growth behind the ear

Derm Dx: A growth behind the ear

A 58-year-old man presents for evaluation of a growth behind his left ear. The lesion has been present for at ...

Derm Dx: A rash on the cheek and forehead

Derm Dx: A rash on the cheek and forehead

The patient is a 43-year-old Hispanic man who complains of a rash affecting his right cheek and forehead. The eruption ...

Derm Dx: A rash on the arms and trunk of an elderly man

Derm Dx: A rash on the arms and trunk of an elderly man

The patient is an 86-year-old man with a 4-decade history of skin rashes. The rash was first noted on his ...

Derm Dx: An asymptomatic rash on the lower extremities

Derm Dx: An asymptomatic rash on the lower extremities

A 27-year-old man presents with an asymptomatic rash of the lower extremities, which developed about 1 month prior. The rash ...

Derm Dx: A papular rash on the scalp

Derm Dx: A papular rash on the scalp

A 31-year-old man presents to a homeless clinic complaining of a papular rash located on the occipital region of his ...

Derm Dx: Pink plaques and crusting ulcerations

Derm Dx: Pink plaques and crusting ulcerations

A 53-year-old woman with a history of hypertension, alcohol abuse, and amphetamine dependence presents with painful wounds on the bilateral ...

Derm Dx: A blue-black nodule on the hand

Derm Dx: A blue-black nodule on the hand

A 33-year-old Malaysian woman requests removal of a blue–black growth on her right hand. The lesion has been present for ...

Derm Dx: Sudden onset of itchy, reddened macules

Derm Dx: Sudden onset of itchy, reddened macules

A 42-year-old woman presents with a sudden onset of itchy, reddened macules on her trunk. Stroking her skin induces localized ...

Derm Dx: Flesh-colored lesions on an infant

Derm Dx: Flesh-colored lesions on an infant

A mother brings in her 13-day-old baby for evaluation of facial lesions. Noted on examination are flesh-colored lesions located in ...

Derm Dx: Hair loss in a 15-year-old female

Derm Dx: Hair loss in a 15-year-old female

A Hispanic woman brings her 15-year-old daughter for evaluation of hair loss at the front of her scalp. Diffuse thinning ...

Derm Dx: An asymptomatic eruption on the legs and trunk

Derm Dx: An asymptomatic eruption on the legs and trunk

A 76-year-old man is referred for evaluation of an asymptomatic eruption that began on his legs about 2 weeks ago ...

Derm Dx: A rash after a streptococcal throat infection

Derm Dx: A rash after a streptococcal throat infection

A 16-year-old female presents with dermatitis that appeared suddenly after a streptococcal throat infection 10 days earlier. She is otherwise ...

Derm Dx: Scaling dermatitis on the scalp and face

Derm Dx: Scaling dermatitis on the scalp and face

A 7-month-old Hispanic female child presents for evaluation of a scaling dermatitis of several weeks in duration affecting her scalp ...

Derm Dx: A growing lesion first observed in early childhood

Derm Dx: A growing lesion first observed in early childhood

An 18-year-old Caucasian male presents for evaluation of a growth on his leg that he first noted in early childhood. ...

Derm Dx: A hard, fixed nodule with a bluish tint on the leg

Derm Dx: A hard, fixed nodule with a bluish tint on the leg

A 33-year-old woman presents with a hard, fixed nodule of the left lower leg. She states that it developed approximately ...

Derm Dx: A red and itchy rash after a vacation

Derm Dx: A red and itchy rash after a vacation

A 37-year-old Caucasian man presents to the emergency department with a red and itchy rash for the past 7 days. ...

Derm Dx: A flesh-colored lesion above the lip

Derm Dx: A flesh-colored lesion above the lip

A 73-year-old man presents with a lesion above his lip, of approximately 1 year in duration. The site is traumatized ...

Derm Dx: Discoloration on the buttocks and lower back

Derm Dx: Discoloration on the buttocks and lower back

A 52-year-old woman with a history of chronic vertebral disk problems and lumbar surgery is referred for evaluation of a ...

Derm Dx: Pink to flesh-colored papules on a young child

Derm Dx: Pink to flesh-colored papules on a young child

A 17-month-old Hispanic female presents with a 6-week history of a rash most prominent on her arms and legs. A ...

Derm Dx: A rash on the nasolabial folds, eyelashes, and scalp

Derm Dx: A rash on the nasolabial folds, eyelashes, and scalp

A 68-year-old male presents for treatment of a rash affecting his nasolabial folds, eyelashes, forehead, and scalp. He complains that ...

Derm Dx: Multiple moles and extensive sun exposure

Derm Dx: Multiple moles and extensive sun exposure

The patient is a 47-year-old female requesting full body examination, as she has multiple moles and a family history of ...

Derm Dx: Bumps on the leg 10 years after cancer surgery

Derm Dx: Bumps on the leg 10 years after cancer surgery

The patient had salivary gland cancer diagnosed and surgically excised 10 years ago. Examination of the affected ankle reveals scattered ...

Derm Dx: A pruritic eruption on the arms and trunk

Derm Dx: A pruritic eruption on the arms and trunk

A patient’s rash began more than 2 weeks ago and has not responded to 1% hydrocortisone cream. He denies fever ...

Derm Dx: Simultaneous appearance of multiple indurated plaques

Derm Dx: Simultaneous appearance of multiple indurated plaques

Several of these dusky red indurated plaques appeared simultaneously on the back, thigh, and scalp of a 70-year-old nonsmoker in ...

Derm Dx: A factory worker with an itchy rash on the wrists and ankles

Derm Dx: A factory worker with an itchy rash on the wrists and ankles

A 42-year-old manufacturing plant worker presents with an itchy rash that was previously diagnosed as contact dermatitis. Mometasone cream has ...

Derm Dx: A reddish rash on the scrotum

Derm Dx: A reddish rash on the scrotum

A 38-year-old man presents with diffuse erythema of his scrotum. Oral fluconazole and topical econazole have been ineffective. He is ...

Derm Dx: Discolored patches on the torso of a woman with vulvar lichen sclerosus

Derm Dx: Discolored patches on the torso of a woman with vulvar lichen sclerosus

Examination of a 62-year-old woman with biopsy-confirmed lichen sclerosus of the vulvar region finds discolored patches with central telangiectasias on ...

Derm Dx: A growing knot in the palm

Derm Dx: A growing knot in the palm

A nonsmoker who admits to binge drinking presents with a firm, fixed cord in her palm and loss of mobility ...

Derm Dx: Whitening and crumbling of fingernails

Derm Dx: Whitening and crumbling of fingernails

An 11-year-old boy presents with hand and foot blisters, a slight fever, mouth irritation, and most recently, distal whitening and ...

Derm Dx: Purplish scrotal lesions in a man with hypertension

Derm Dx: Purplish scrotal lesions in a man with hypertension

A 70-year-old man who takes hydrochlorothiazide for hypertension presents with violaceous papules on his scrotum, which also has a reddish ...

Derm Dx: Extensive sun exposure and red lesions on the arms and legs

Derm Dx: Extensive sun exposure and red lesions on the arms and legs

A 65-year-old man presents with red lesions on his arms and legs. He has no history of skin cancer but ...

Derm Dx: A firm nodule with a positive skin crease sign

Derm Dx: A firm nodule with a positive skin crease sign

A 10-year-old boy presents with an asymptomatic firm nodule on his cheek. When the lesion is squeezed, a longitudinal crease ...

Derm Dx: An enlarging erythematous nodule on the forehead

Derm Dx: An enlarging erythematous nodule on the forehead

A 43-year-old woman presents with a growing nodule on her forehead. When it was smaller, it was "easily covered by ...

Derm Dx: A baby with a rash on the hands and feet

Derm Dx: A baby with a rash on the hands and feet

A 3-month-old Hispanic male presents with scattered flesh-colored papules and pustules on his palms and soles.

Derm Dx: Itchy bumps on a man who uses a hot tub regularly

Derm Dx: Itchy bumps on a man who uses a hot tub regularly

A man presents with itchy bumps on his arms and legs. He lives alone, does not have pets, and uses ...

Derm Dx: Hyperpigmented, hyperkeratotic papules covered by waxy scale

Derm Dx: Hyperpigmented, hyperkeratotic papules covered by waxy scale

A moderately obese 40-year-old white woman presents with an intermittently pruritic rash on her chest and flexural and anogenital regions. ...

Derm Dx: Why would this word appear on this man's back?

Derm Dx: Why would this word appear on this man's back?

A 20-year-old college student presents with a 4-week history of intermittent itching, and stroking of the skin of his back ...

Derm Dx: A new scalp lesion in a man with a history of cancer

Derm Dx: A new scalp lesion in a man with a history of cancer

An 84-year-old man with a history of sun exposure, basal and squamous cell carcinomas, and solar keratoses presents with a ...

Derm Dx: Geometrically arranged furrows on the neck

Derm Dx: Geometrically arranged furrows on the neck

Examination of a fair-skinned 80-year-old man who comes in for treatment of actinic keratoses finds geometrically arranged furrows on his ...

Derm Dx: Distressing male groin lesions

Derm Dx: Distressing male groin lesions

A 40-year-old man presents with a 2-year history of asymptomatic but psychologically distressing lesions on his groin.

Derm Dx: A rash about the mouth and chin

Derm Dx: A rash about the mouth and chin

A 21-year-old woman presents with a rash over her mouth and chin that clears when treated with oral prednisone and ...

Derm Dx: A diffuse erythematous eruption on a teenager

Derm Dx: A diffuse erythematous eruption on a teenager

A 16-year-old female presents with a diffuse erythematous eruption with minimal scale, sparing the palms, soles, and face.

Derm Dx: Ptosis following an outpatient cosmetic procedure

Derm Dx: Ptosis following an outpatient cosmetic procedure

A 54-year-old man presents with a 2-week history of a drooping eyelid. He is taking finasteride and underwent an outpatient ...

Derm Dx: Progressive discoloration of the buttocks

Derm Dx: Progressive discoloration of the buttocks

A 53-year-old woman presents with dusky red, slightly indurated, well-demarcated plaques on the buttocks. The condition is asymptomatic but of ...

Derm Dx: A pimple that didn't stop growing

Derm Dx: A pimple that didn't stop growing

A 44-year-old man presents with a 3-year history of what he calls a "pimple that didn't stop growing." He admits ...

Derm Dx: A hairdresser notices a scalp lesion on her client

Derm Dx: A hairdresser notices a scalp lesion on her client

A hairdresser notices a lesion on the scalp of an 89-year-old woman. The patient did not realize it was there; ...

Derm Dx: Vesiculation under the lip

Derm Dx: Vesiculation under the lip

A woman with a history of Hashimoto thyroiditis presents with hair thinning and an erythematous patch with vesiculation under her ...

Derm Dx: A rash that doesn't respond to steroids

Derm Dx: A rash that doesn't respond to steroids

On receiving treatment for seborrheic keratosis on his back, another rash is noted on a man’s chest and abdomen. The ...

Derm Dx: Scattered papules on a high school football player

Derm Dx: Scattered papules on a high school football player

A 16-year-old high school football player presents with scattered flesh-colored papules, and he does not know if his girlfriend, other ...

Derm Dx: An asymptomatic flesh-colored nodule of unknown duration

Derm Dx: An asymptomatic flesh-colored nodule of unknown duration

A flesh-colored nodule is found on examination of a 42-year-old fair-skinned woman. She does not know how long it has ...

Derm Dx: A growing rash on a man with a history of sun exposure

Derm Dx: A growing rash on a man with a history of sun exposure

A fair-skinned 48-year-old man with a history of ample sun exposure presents with dilated blood vessels, brownish hyperpigmentation, and thinning ...

Derm Dx: A painful lesion on the inside of the lip

Derm Dx: A painful lesion on the inside of the lip

A 50-year-old woman presents with a painful lesion on the inside of her upper lip. She has had similar lesions ...

Derm Dx: A rash on the axillae that sometimes itches or burns

Derm Dx: A rash on the axillae that sometimes itches or burns

A 45-year-old moderately obese man presents with well-demarcated erythematous patches on the axillae and an erythematous patch with scale on ...

Derm Dx: A rash about the umbilicus

Derm Dx: A rash about the umbilicus

A 53-year-old man presents with a well-demarcated zone of erythema about the umbilicus that has not responded to treatment with ...

Derm Dx: A rare neoplasm on the nose

Derm Dx: A rare neoplasm on the nose

An 87-year-old man presents with a 3-mm, flesh-colored papule on his nose. He has no history of skin cancer or ...

Derm Dx: A persistent pruritic rash on the buttocks

Derm Dx: A persistent pruritic rash on the buttocks

A 22-year-old man presents with a pruritic rash that was diagnosed as scabies 3 weeks earlier. However, the rash has ...

Derm Dx: A farmer's rash that worsened with topical corticosteroid

Derm Dx: A farmer's rash that worsened with topical corticosteroid

A farmer, aged 76 years, presents with a moderately pruritic rash on his chest that became worse when he used ...

Derm Dx: Dermatitis over the torso that looks like an allergic reaction

Derm Dx: Dermatitis over the torso that looks like an allergic reaction

A 28-year-old woman presents with a 3-week history of a minimally pruritic dermatitis involving her chest, back, and abdomen. It ...

Derm Dx: A new growth on a woman who has had skin cancer

Derm Dx: A new growth on a woman who has had skin cancer

A 59-year-old woman presents with a 3-month history of a growth on her forearm. She is a cigarette smoker and ...

Derm Dx: Is this Lyme disease?

Derm Dx: Is this Lyme disease?

A 20-year-old college student tests negative for Lyme disease but is placed on doxycycline. She questions the treatment and why ...

Derm Dx: A waxy, yellowish plaque since birth

Derm Dx: A waxy, yellowish plaque since birth

A 3-month-old male presents with a waxy, yellowish 3-cm plaque located on his scalp since birth.

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