Angiotensin-converting enzyme in sarcoid perivasculitis

Area of Science:

• Ophthalmology
• Rheumatology
• Pulmonology

Background:

• Sarcoidosis is a multisystem inflammatory disease.
• Ocular involvement, particularly anterior uveitis, is common in sarcoidosis.
• Serum angiotensin-converting enzyme (ACE) is a biomarker often used to monitor sarcoidosis activity.

Observation:

• A patient with systemic sarcoidosis and anterior uveitis showed improvement with steroid therapy, including normalized ACE levels.
• Upon steroid tapering, the patient developed retinal perivasculitis, accompanied by a slight elevation in ACE levels.
• Increasing steroid dosage resolved the retinal findings, but ACE levels remained unchanged.

Findings:

• Serum ACE levels may not reliably indicate the activity of posterior segment ocular sarcoidosis.
• Retinal perivasculitis in sarcoidosis can occur independently of significant ACE level fluctuations.
• Steroid therapy remains effective for managing ocular manifestations of sarcoidosis.

Implications:

• Clinicians should consider monitoring ocular findings directly, rather than relying solely on ACE levels, for posterior segment sarcoidosis.
• Further research is needed to understand the relationship between ACE levels and specific sarcoidosis manifestations.
• This case highlights the complexity of sarcoidosis management and biomarker interpretation.