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[Muscle-localized tumorlike polyarteritis nodosa].
1Service de médecine interne et maladies infectieuses, CHU La Cavale Blanche, boulevard Tanguy-Prigent, 29609 Brest, France.
La Revue De Medecine Interne
|October 16, 2002
Summary
Localized tumorlike polyarteritis nodosa in forearm muscles is rare. This muscle-localized form of polyarteritis nodosa (PAN) has a benign course and responds well to corticosteroids, though relapses can occur.
Area of Science:
- Rheumatology
- Pathology
- Oncology
Background:
- Systemic vasculitis rarely presents as tumorlike lesions, predominantly affecting the genitourinary system and breast.
- Muscle-localized tumorlike periarteritis nodosa (PAN) is exceptionally uncommon.
Observation:
- This report details a rare case of localized, tumorlike polyarteritis nodosa affecting the forearm muscles of a 90-year-old female patient.
- The clinical presentation mimicked a neoplastic mass.
Findings:
- Review of similar cases indicates that muscle-localized PAN follows a generally benign clinical course.
- Prompt response to corticosteroid monotherapy is characteristic of this localized form.
- Potential for disease relapse exists despite initial treatment efficacy.
Implications:
- Highlights the importance of considering vasculitis in the differential diagnosis of tumorlike lesions, even within muscle tissue.
- Suggests corticosteroids as a primary treatment modality for localized muscle PAN.
- Emphasizes the need for long-term monitoring due to the possibility of relapses.