[Erythermalgia and systemic lupus erythematosus]

Area of Science:

• Rheumatology
• Dermatology
• Hematology

Background:

• Erythermalgia is a rare condition characterized by episodic burning pain and erythema, typically affecting the extremities.
• Systemic lupus erythematosus (SLE) is a chronic autoimmune disease with diverse clinical manifestations.
• The association between erythermalgia and SLE requires careful clinical evaluation and classification.

Observation:

• Three distinct cases illustrate the varied clinical presentations of erythermalgia in patients with SLE.
• Case 1: Erythermalgia developed during the course of established SLE.
• Case 2: Erythermalgia preceded the diagnosis of SLE by four years.
• Case 3: Erythermalgia was linked to thrombocythemia, a complication of immunosuppressive therapy for SLE, rather than active lupus flares.

Findings:

• The observed cases highlight the complex relationship between erythermalgia and SLE, emphasizing different temporal and etiological associations.
• The study advocates for a classification focusing on primary (erythermalgia) and secondary (erythermalgia-like syndrome) forms.
• Secondary erythermalgia can be associated with myeloproliferative disorders, other systemic diseases like SLE, or drug-induced conditions.

Implications:

• Accurate classification of erythermalgia, distinguishing primary from secondary forms, is crucial for appropriate patient management.
• Recognizing erythermalgia as a potential manifestation or complication in SLE patients can lead to earlier diagnosis and tailored treatment.
• Further research is needed to elucidate the underlying mechanisms connecting erythermalgia and SLE, and to refine therapeutic strategies.