“…13 IgG4-related disease has been observed in nearly every organ, including the biliary system, thyroid, salivary glands, kidneys, lungs, skin, lymph nodes, and orbital tissues. 14 Airway involvement has been described in the nasal cavity, trachea, and lungs 8,10,15,16 and seldom in the larynx, 7,17 with no reports of isolated pharyngeal involvement. In addition, previously named entities such as Mikulicz's syndrome, Küttner's tumor, Riedel's thyroiditis, and inflammatory pseudotumor (including orbital pseudotumor) have now been recognized to be a part of the IgG4-RD spectrum.…”