Pulmonary manifestations associated with positive anti neutrophil cytoplasmic antibodies: The tip of the iceberg.

Background: Even though anti-neutrophil cytoplasmic antibodies (ANCA) are frequently linked to ANCA associated vasculitis (AAV), it's important to understand that other illnesses, including lung diseases, can also manifest as ANCA positivity. Finding the incriminated pathology might be difficult.

Aim: To report four ANCA-associated cases with a diagnosis problem.