Exclusively ocular and cardiac manifestation of granulomatosis with polyangiitis – a case report

BACKGROUND: Granulomatosis with polyangiitis (GPA) is an antineutrophil cytoplasmic antibodies (ANCA)-associated necrotizing granulomatous vasculitis that affects small to medium size vessels. While the classical form with renal and respiratory tract involvement is mainly seen, a limited form (i.e., with no renal disease) may also occur. We present an unusual case of GPA manifesting merely as a bilateral ocular involvement and complete heart block. CASE PRESENTATION: We report a case of a 60-year-old male patient with a limited form of GPA who initially presented with bilateral chronic conjunctivitis and complete atrioventricular block. His visual acuity subsequently declined due to progression to bilateral panuveitis with exudative retinal detachment. The laboratory investigation revealed the elevation of acute phase reactants and strongly positive cytoplasmic ANCA (c-ANCA). Despite negative conjunctival and musculocutaneous biopsy results, the positive c-ANCA, and the clinical manifestation, i.e., heart and ocular involvement, led to the diagnosis of GPA. The remission was achieved with cyclophosphamide and methylprednisolone systemic therapy. CONCLUSIONS: A limited form of GPA may be a diagnostic chameleon. Though rare, it is essential to consider even extremely uncommon findings. Our patient is the first case of such a unique demonstration of the limited GPA manifesting as a bilateral ocular involvement and complete heart block.