Poikiloderma vasculare atrophicans: a distinct clinical entity?

Area of Science:

• Dermatology
• Immunohistochemistry
• Pathology

Background:

• Poikiloderma vasculare atrophicans (PVA) is a rare dermatosis with an uncertain relationship to mycosis fungoides (MF).
• Distinguishing PVA from poikilodermic MF is clinically significant due to differing prognoses.

Purpose of the Study:

• To present a case of PVA with characteristic histological and immunohistochemical findings.
• To discuss the diagnostic challenges and nosological status of PVA within the spectrum of cutaneous T-cell lymphomas.

Main Methods:

• Case presentation of a 48-year-old female with PVA.
• Histopathological examination of skin biopsy.
• Immunohistochemical staining for CD8 expression.

Main Results:

• Histology showed features suggestive of PVA, notably lacking Pautrier's microabscesses or atypical lymphoid cells.
• Immunohistochemistry revealed a CD8+ T-cell infiltrate.
• The patient's condition followed a benign clinical course.

Conclusions:

• PVA presents a CD8+ phenotype, but its precise classification remains debated—whether it's MF, a variant, or a distinct entity.
• The benign clinical course of most PVA cases underscores the importance of differentiating it from poikilodermic MF.
• Further research is needed to elucidate the pathogenesis and clarify PVA's position in the cutaneous T-cell lymphoma spectrum.