Left atrial myxoma detected after an initial diagnosis of polymyalgia rheumatica

A classic mimicker of systemic vasculitis

BACKGROUND AND OBJECTIVE

Embolic and constitutional manifestations of intracavitary cardiac tumors are included within the classic mimickers of systemic vasculitis, especially in those in which there are no cardiac manifestations. We present a case report of atrial myxoma in which the patient only presented systemic symptoms and in whom an initial diagnostic approach of systemic vasculitis was made. We also performed a literature search of the cases described.

PATIENT AND METHOD

A case report of atrial myxoma with atypical presentation manifested as a systemic disease with no concomitant cardiac symptoms is described. The case report is discussed and 11 cases of atrial myxoma pseudovasculitis described in the literature are reviewed, emphasizing their similarities and differences.

DISCUSSION

Constitutional symptoms and cutaneous manifestations were the most common. Most of the cases showed partial response to glucococorticosteroid treatment, reinforcing the theory of the inflammatory role in its pathogenesis. Mean delayed time to diagnosis was 12.27 months.

CONCLUSION

Atrial myxoma is a systemic vasculitis mimicker, this being difficult to diagnose in the absence of cardiac manifestations. This delay in diagnosis entails serious complications.