"Several reports suggest that those with IgG4-RD may having higher propensity for pulmonary and extrapulmonary malignancies, inclusive of lymphoma, for unknown reasons 6."
"IgG4-related lung disease is a recently described condition. It may occur with or without systemic involvement. It is considered part of the spectrum of IgG4-related disease."
"alveolar interstitial subtype: showing honeycombing, bronchiectasis and diffuse ground glass opacity"