Granulomatous changes associated with pigmented purpuric dermatosis.

Area of Science:

• Dermatology
• Pathology

Background:

• Pigmented purpuric dermatoses (PPD) are a group of rare vascular disorders.
• Granulomatous inflammation is an uncommon feature in PPD.

Observation:

• This study presents three cases of PPD with granulomatous features.
• A literature review of similar cases was conducted, analyzing histopathologic findings and clinical associations.
• A novel variant of GPPD characterized by mid-to-deep dermal granulomatous infiltrates was identified in two patients.

Findings:

• Granulomatous PPD typically shows granulomas superimposed on classic PPD changes.
• The newly identified variant presents with distinct granulomatous infiltrates.
• No consistent association with underlying systemic diseases was found, though hyperlipidemia was noted in several reviewed cases.

Implications:

• This research expands the understanding of the spectrum of PPD.
• Recognition of the new GPPD variant may aid in diagnosis and management.
• Further research is needed to elucidate the pathogenesis and potential associations of granulomatous PPD.