Epidemiological, clinical and laboratory profiles of cutaneous polyarteritis nodosa patients: Report of 22 cases and literature review.

UNLABELLED: Cutaneous polyarteritis nodosa (CPAN) is a rare disease that affects small and middle caliber vessels of the deep dermis and subcutaneous tissue and its etiopathology remains yet to be understood.

METHODS: Retrospective review of twenty two cases diagnosed as CPAN and confirmed by skin biopsy over the last 11 years was evaluated in our department.

RESULTS: We found predominance in white woman, mean age of 39.4 years, showing no comorbidities in most of our sample. Mean follow-up time was 58 months. The most frequent cutaneous manifestations were ulcers, livedo racemosa, subcutaneous nodules, atrophie blanche lesions and purpuras; with lower limb involvement in all cases, however other areas were also involved. The main regional symptoms were pain and paresthesia, while systemic complaints were absent in the majority of cases. Mononeuritis multiplex was identified in a quarter of our sample. Most of the laboratory findings were non-specific. There was evidence for previous contact with Mycobacterium tuberculosis in 46.1% of cases which were tested for purified protein derivative (PPD) test. In our patients the disease course was benign and without complications, and systemic polyarteritis nodosa did not develop in any patient.

CONCLUSIONS: An extensive work-up including laboratory tests on autoimmunity and thrombophilic factors and investigation of infectious diseases, especially previous contact with tuberculosis agent, should be part of the CPAN investigation.