Panniculitis presents with deep erythematous nodules, induration, and tenderness. Clinical lesions of erythema nodosum can appear as deep-seated, erythematous, tender nodules or can resemble bruises, giving rise to the term…
The primary lesion of a papulosquamous disorder is a papule with scale, but because patients often present later in the course of disease, the primary lesions may not be visible,…
A wide variety of conditions can present with erythema or urticarial lesions. Whereas many conditions such as urticaria and angioedema lack identifiable surface changes, other diagnoses in this chapter have…
Syphilis has been dubbed “the great imitator” for its ability to assume varied morphologies. Primary syphilis is characterized by a chancre—a minimally tender, indurated ulcer—or less commonly by syphilitic balanoposthitis….
Clinical manifestations of leprosy vary from the subtle hypopigmented patches of indeterminate leprosy to the diffuse facial infiltration and nodules of lepromatous leprosy. The clinical and histologic manifestations of the…
Pityriasis rosea presents with erythematous macules that develop a delicate central silver scale. As the lesions evolve, they assume an oval configuration often best observed on the back and flanks….
Tuberculosis and atypical mycobacterial infections can be difficult to diagnose clinically and require a high index of suspicion and familiarity with their manifestations in the skin. Tuberculosis (TB) is more…
Dermatitis can present with a variety of physical examination findings ranging from exuberant oozing to dry scale. These findings represent the acute and chronic inflammation that defines a variety of…
