FRI0210 ORBITAL PSEUDOTUMOR AMONG PATIENTS WITH GRANULOMATOSIS WITH POLYANGIITIS – DATA FROM THE POLISH REGISTRY POLVAS. (2nd June 2020) - Masiak, A.
Abstract : Background: Orbital inflammatory masses have been described as the common manifestation of granulomatosis with polyangiitis (GPA) occuring in 7- 45% of patients. Objectives: Identification and characterization of patients with orbital pseudotumor among Polish patients based on the national vasculitis registry, POLVAS. Methods: Clinical presentation and management of all GPA patients fulfilling ACR criteria or Chapel Hill Consensus Conference definition included to the Polish registry POLVAS who developed orbital masses in the course of GPA were evaluated. Results: Ocular involvement was found in 114 (27%) of 417 GPA patients registered in POLVAS, 34 (8%) developed orbital masses. Mean patients' age was 47.8 (range from 19-75) yrs., 23 (67%) were women. Forty four per cent of the patients developed tumor at the beginning of the disease, 56% during relapse. Patients' characteristics on diagnosis of orbital mass: 24 cANCA, 2 pANCA, and 8 ANCA negative, 9% active smokers and 31% past smokers, 29% had localized disease, 21% early systemic and 50% systemic with organ involvement, 29% had other type of ophthalmological involvement before pseudotumor occurred, 88% had active paranasal sinus involvement, 41% lungs, 15% CNS, 15% skin and 6% heart manifestations. Thirty seven per cent of patients had positive nasal swabs cultures, 50% of which were positive for Staphylococcus aureus. In 65%, tumor occurred during steroid therapy (46% had prednisone more than 5mg/d) and 45% on immunosuppressive treatment (19% when treated with AZA, 16% MTX, 6, 5% MMF and 3, 5% CYC). Due to orbital mass 86.5% were treated with CYC and 13.5% with RTX. Twenty one per cent had complete remission of the pseudotumor, 76% partial remission and in 3% patients there was no response to the treatment; 43% developed visual impairment, 20% suffered from blindness. Conclusion: Orbital inflammatory mass was not common manifestation of GPA among our patients. The mass developed at the beginning or in the course of the disease, even during immunosuppressive treatment. Orbital masses have been resistant to therapeutic interventions and were accompanied by high risk of visual impairment. Disclosure of Interests: Anna Masiak: None declared, Marcin Ziętkiewicz: None declared, Krzysztof Wójcik: None declared, Katarzyna Wawrzycka-Adamczyk: None declared, Radoslaw Jeleniewicz: None declared, Marta Madej: None declared, Joanna Kur-Zalewska: None declared, Katarzyna Jakuszko: None declared, Małgorzata Wisłowska: None declared, Hanna Storoniak: None declared, Michał Komorniczak: None declared, Barbara Bułło-Piontecka: None declared, Iwona Brzosko: None declared, Małgorzata Stasiek: None declared, Eugeniusz Kucharz: None declared, Alicja Dębska-Ślizień: None declared, Maria Majdan Consultant of: Roche, Amgen, Speakers bureau: Roche, Amgen, Jacek Musiał: None declared, Zbigniew Zdrojewski: None declared