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In non-bullous cases, perivascular and interstitial neutrophils are sometimes present in the upper dermis, with damage to blood vessels An interface dermatitis with vacuolar alteration, not otherwise specified, may be caused by viral exanthems , phototoxic dermatitis , acute radiation dermatitis , erythema dyschromicum perstans , lupus ...
Causes of vacuolar interface dermatitis ; Main conditions [1] Characteristics Micrograph Photograph Generally/Not otherwise specified Typical findings, called "vacuolar interface dermatitis": [1] Mild inflammatory cell infiltrate along the dermoepidermal junction (black arrow in image) Vacuolization within the basal keratinocytes (white arrow ...
Typically a superficial and deep perivascular lymphocytic infiltrate. [22] Plasma cells are typically located at the periphery of the lesion, whereas eosinophils are in the center. [22] Kaposi’s sarcoma in patch stage The patch stage typically shows irregular proliferation of jagged vascular channels in the dermis below an integral epidermis.
Eosinophilic dermatosis is a form of dermatosis characterized by a preponderance of eosinophils in the dermis or epidermis. [1] Although it does not always imply a specific etiology, it is still commonly used as a classification in dermatology when more information about the condition is not known.
Eosinophilic cutaneous conditions encompass a wide variety of diseases that are characterized histologically by the presence of eosinophils in the inflammatory infiltrate and/or evidence of eosinophil degranulation.
The dermis contains two vascular networks that run parallel to the skin surface—one superficial and one deep plexus—which are connected by vertical communicating vessels. [8] [11] The function of blood vessels within the dermis is fourfold: to supply nutrition, to regulate temperature, to modulate inflammation, and to participate in wound ...
Patients present with itchy, painful, confluent, violaceous or brown-black macules, papules or plaques usually at the distal lower limbs. There may be ulceration and bleeding. The histologic features are capillary proliferation and perivascular inflammation involving eosinophils in the dermis with minimal epidermal changes.
Based on their causes, hypereosinophilias can be sorted into subtypes. However, cases of eosinophilia, which exhibit eosinophil counts between 500 and 1,500/μL, may fit the clinical criteria for, and thus be regarded as falling into, one of these hypereosinophilia categories: the cutoff of 1,500/μL between hypereosinophilia and eosinophilia is somewhat arbitrary.