Widespread foreign-body granulomas and elevated serum angiotensin-converting enzyme

Area of Science:

• Dermatology
• Pathology
• Toxicology

Background:

• Foreign-body granulomatous inflammation can present with diverse clinical and histological features.
• Systemic involvement and unusual etiologies require thorough investigation.

Observation:

• A patient presented with widespread skin and lymph node granulomas, splenomegaly, cutaneous anergy, and peripheral blood eosinophilia.
• Elevated serum angiotensin-converting enzyme (ACE) levels were noted.
• Histopathology revealed foreign-body granulomas containing crystalline material with lymphocytes, histiocytes, eosinophils, and giant cells.

Findings:

• Electron-probe x-ray microanalysis identified silicon, magnesium, iron, calcium, phosphorus, zinc, titanium, and chromium within the doubly refractile crystalline material.
• The elemental composition strongly suggests inorganic substances such as talc, cement, or inorganic pigments as the causative agents.
• The combination of clinical presentation, laboratory findings, and material analysis points to an unusual exogenous etiology.

Implications:

• This case highlights the importance of considering exogenous inorganic materials in the differential diagnosis of granulomatous diseases.
• Advanced analytical techniques like electron-probe x-ray microanalysis are crucial for identifying novel or unusual etiological agents.
• Further research into environmental exposures and their potential dermatopathological consequences is warranted.