Skin Diseases

Eccentric darker pigmentation in this small asymptomatic lesion strongly suggests malignant melanoma. This patient had a history of non-melanoma skin cancer, but was unaware of the questionable growth.

Preseptal cellulitis, myasthenia gravis, squamous cell carcinoma, atheromatous embolism, calciphylaxis are shown here.

Seborrheic keratosis; retropharyngeal abscess; in situ malignant melanoma; statin-induced myalgias; basal cell carcinoma

Facial papules; pediatric gastrostomy complications; unexplained trismus; renal abscess.

Test your clinical skills in this week’s 5-question quiz.

Carcinoma?; spirometry to assess chronic cough?; neurofibroma?; laryngeal neoplasm? What do you think?

Diabetic myonecrosis; Persistent bacterial bronchitis; basal cell carcinoma; statin-drug pleiotropy; spinal epidural abscess

Acne?; Halo Nevus; Solitary Fibrous Tumor; idiopathic chilblains

Biopsy of the 3 red “spots” in close proximity showed lichenoid keratosis-a benign lesion, probably related to seborrheic keratosis, which often mimics skin cancer.

Livedo reticularis; persistent fatigue and weight gain; groin rash; paraneoplastic syndrome; funny mole.

Does this look like melanoma? Which is not true of Löfgren syndrome? Yoga and Afib; what cause of mental confusion? Skin lesions and HIV.. . . See if you can answer this week's quiz questions.

Cutaneous horns can arise on top of: seborrheic keratosis (as in this patient’s case), actinic keratoses, warts, basal and squamous cell carcinomas. Therefore, the lesion-and especially the base-must be submitted for pathologic diagnosis.

Edema of the hands has numerous etiologies: leukocytoclastic vasculitis, puffy hands from HCV infection, DVT, lymphedema, trauma

Löfgren syndrome is a form of acute sarcoidosis characterized by a triad of symptoms: hilar adenopathy, erythema nodosum, and arthralgias.

Ecchymosis is caused by the rupture of small blood vessels beneath the skin. Some causes are benign, others may herald dangerous disease.

A lot of sound-alike medications are on the market that can easily be prescribed incorrectly. Hydralazine and hydroxyzine are a good example, as this case attests.

These firm, pigmented plaques, in a young African American, are most likely cutaneous sarcoidosis. This diagnosis was verified by biopsy.

One of two common presentations of tinea pedis, this morphology is more common in those whose interdigital space is tight, leading to moisture retention and maceration. Diligent use of any topical antifungal will clear this.

This lesion looks like basal cell or squamous cell carcinoma, but biopsy showed it to be an idiopathic inflammatory disorder of the external ear. Skin cancers of the pinna are rarely painful, as this lesion was.

This uncommon benign entity closely mimics squamous cell carcinoma, superficial basal cell carcinoma, and advanced actinic keratoses. The lichenoid keratosis does not transform into skin cancer.

It is often surprising how wide and how deep skin cancers have already spread, despite a relatively small-looking superficial component. This patient had a history of melanoma in situ.

The first appropriate use criteria for any test or treatment within the field of dermatology were developed recently.

Almost no benign disorder affecting nasal skin should bleed.

Always check the toenails for fungal infection after diagnosing tinea pedis, corporis, or cruris. The toenails may act as the source of infection and a reservoir, which may lead to reinfection after the cutaneous dermatophytosis is cleared.

Elevated serum uric acid level is pathognomonic for gout. Untreated gout may lead to tophi, nephropathy, and uric acid nephrolithiasis.

This is the most common form of amyloid deposition in the skin. It is not associated with the systemic disease, but is solely a cutaneous malady.

Syphilis is often called the "great imitator." The slides that follow show syphilis in various guises-and various disorders that can mimic the cutaneous manifestations of the sexually transmitted infection.

The shiny white and atrophic skin involving the vulva and perirectal skin is nearly pathognomonic for lichen sclerosus et atrophicus This inflammatory disorder of unknown etiology gradually increases in intensity.

Erythema multiforme; Rocky Mountain Spotted Fever; syphilis; pityriasis rosea. . . which of these disorders is the most likely cause of these macular lesions?

The fairly well-defined erythematous plaques covered with silvery scale are typical for psoriasis. In some patients, the disorder may be limited to the genital skin.