Diagnosis: Segmental lichen aureus.
MICROSCOPIC FINDINGS AND LABORATORY FINDINGS
Histopathologic examination showed a bandlike inflammatory infiltrate consisting of lymphocytes, mainly in the papillary and reticular dermis, interspersed with extravasated erythrocytes. The hemosiderin deposits were demonstrated by a Prussian blue stain (Figure 3). These features were consistent with pigmented purpuric dermatosis. Serologic tests were negative for antinuclear antibody, rheumatoid factor, and antibodies to hepatitis B virus surface antigen and hepatitis C virus.
Figure appears in full text version.
|
|
|
|
|
DISCUSSION
Pigmented purpuric dermatosis has been categorized into several types, including purpura annularis telangiectaticum (Majocchi disease), Schamberg disease, pigmented purpuric lichenoid dermatitis (Gougerot-Blum disease), eczematidlike purpura, lichen aureus, and others (eg, linear and granulomatous).
Lichen aureus, also known as lichen purpuricus, is a localized, persistent form of pigmented purpuric dermatosis.1 Some authors prefer the term lichen purpuricus to lichen aureus because purpura is a more permanent finding than the golden brown color, which seems to be a late-stage feature of the disease.2 Lichen aureus is . . . [Full Text of this Article]
