Dermatology

Itchy skin. Is it hives? Scabies? Lichen planus? Or just an insect bite? Itching can also be psychogenic, or due to renal, hepatic, or thyroid disorders. Learn how to diagnose it in this video.

The almost black nature of the lesion arouses suspicion for melanoma. A conservative excisional biopsy revealed this to be a traumatic tattoo, however.

An 80-year-old-woman was seen as an inpatient hospital consult. A persistent pruritic eruption had developed acutely on the legs.

Rosacea may look like acne, but it is a vascular, inflammatory disease. Learn to identify, prevent, and treat this disfiguring condition.

These burning red patches around the mouth, known as perleche, are aggravated by aging. Learn how to treat it.

Acne vulgaris in adults: Unlikely. So what causes these acne-like excoriations? Learn about the many triggers for skin lesions that look like acne, but are not.

A 67-year-old woman noted the appearance of several non-tender, rock-hard, purple-colored nodules on her legs. Her past medical history was significant for distant non-Hodgkin lymphoma.

A 40-year-old man sought advice regarding therapeutic options for an asymptomatic, “red spot” on the flank. Review of systems was entirely negative.

A boil, painful and nasty: Is it a cyst? Is it a bug bite? Should you culture? Is it MRSA? How should you treat it? What if it recurs? Listen and learn.

A 56-year-old woman noted the abrupt onset of several very painful ulcerations located on her back. The patient had known (and active) Crohn disease, clinical depression requiring ongoing psychiatric care, and borderline diabetes mellitus.

A 32-year-old woman presents with a swollen, painful fourth digit on the right hand. While housecleaning, a traumatic erosion developed on the ipsilateral hyponychium.

A 78-year-old man sought medical attention after noting a non-tender, subtle “hole” in his forehead. The firm lesion was asymptomatic.

A 63-year-old woman presented for medical attention relating to the acute onset of an intensely pruritic, oozing eruption along the hairline, behind the ears and on the upper face. This eruption followed the first use of a new shampoo product

Red face. Roseacea? Lupus? Sunburn? No, it's seborrheic dermatitis. Here's how to tell.

A 56-year-old woman insisted on an “emergency” appointment due to the relentless appearance of pruritic skin “lesions” on the arms and legs. She admitted to manipulating the skin (scratching, picking, gouging) in an attempt to lessen associated itching.

Here: a review of the potential health effects of bed bugs, diagnosis and treatment, and comments about future directions in bed bug control and public health efforts to manage the pest.

Seborrheic keratoses, cherry angiomas, sebaceous hyperplasia: Learn to identify these innocuous lesions common to aging skin.

Joint hypermobility; “cigarette-paper” skin; keloid scars; and pectus and scoliosis: to what common diagnosis do these disparate findings in 3 different patients point? Click here for more details.

A 59-year-old woman presents for evaluation of a painful, draining neck lesion. She is a native of India and returns to her home country yearly to visit relatives.

A 45-year-old woman noted painless, red, crusted papules on the hand. This was followed by the appearance of deep, slightly tender red nodules on the arm and ipsilateral axillary adenopathy.

A 57-year-old obese woman with known and poorly controlled type 2 diabetes presented with the sudden onset of “yellow bumps all over.” Representative lesions on the back and elbows are shown.

A 26-year-old African American woman presents for help with “pimples” on both sides of the nose. She is ostensibly healthy and takes no medications.

A 26-year-old woman notes the insidious onset of an abnormal nail. The nail plate gradually grew away from the underlying nail bed and then began to elevate in a tented fashion.

A 32 year-old man presents with deteriorating thumbnails. He is in good health except for a long-standing seizure disorder that is controlled with phenytoin.

A 23-year-old man presented for medical attention with these mildly to moderately pruritic lesions located only on his hands. He was in good health and took no medications.