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  • Title: Application of Lip Biopsy for the Histological Diagnosis of Immunoglobulin G4-Related Disease.
    Author: Tachibana T, Orita Y, Wani Y, Komatsubara Y, Kuroda K, Naoi Y, Gion Y, Makino T, Nishizaki K, Sato Y.
    Journal: Ear Nose Throat J; 2022 Sep; 101(8):547-551. PubMed ID: 33147065.
    Abstract:
    We describe the case of a 51-year-old woman with immunoglobulin G4-related disease (IgG4-RD) diagnosed using lip biopsy. She reported having bilateral submandibular nodules for a month. Magnetic resonance imaging showed diffuse swelling in the bilateral submandibular glands (SMGs), suggesting inflammatory changes. Laboratory data revealed an elevated level of serum IgG4. Fine needle aspiration cytology of the SMG showed a considerable number of lymphocytes with degeneration but did not demonstrate specific findings for a definitive diagnosis of IgG4-RD. Lip biopsy was performed, and a biopsy specimen from the labial salivary gland showed abundant lymphoplasmacytic infiltration with a large number of IgG4-positive cells. The patient was diagnosed with IgG4-RD based on histological and laboratory findings. Findings of further examinations revealed that the patient had autoimmune pancreatitis, confirming our diagnosis. Four months after prednisolone administration, improvement of the submandibular and pancreatic lesions was observed. One year after the initial presentation, the serum IgG4 level was normalized. In cases of IgG4-RD with salivary gland involvement, lip biopsy might be one of the options for the histological diagnosis of IgG4-RD.
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