title: 18F-FDG PET/CT Imaging Features of IgG4-Related Pulmonary Inflammatory Pseudotumor at Initial Diagnosis and During Early Treatment Monitoring.
abstract: We present a proven case of pulmonary inflammatory pseudotumor that illustrates the (18)F-FDG PET/CT imaging features of this "great mimicker of malignancy" both at initial diagnosis and during early monitoring of corticosteroid therapy, which is advocated as the first-line treatment. Although the patient showed some symptomatic response to corticosteroid therapy, as well as a modest reduction in SUVmax, complete surgical resection was eventually needed in view of the relative nonresponse. (18)F-FDG avidity in untreated cases of pulmonary inflammatory pseudotumor has been quite characteristic and may potentially be used to evaluate early response of this IgG4-related disease to nonsurgical treatment and to detect residual disease or recurrence after therapeutic intervention.
authors: Radiation Medicine Centre (BARC), Tata Memorial Hospital Annexe, Parel, Mumbai and drsanb@yahoo.com.
authors: Sandip
authors: S
authors: Basu
authors: Department of Pulmonary Medicine, T.N. Medical College, B.Y.L. Nair Hospital, Mumbai.
authors: Ketaki
authors: K
authors: Utpat
authors: Department of Pulmonary Medicine, T.N. Medical College, B.Y.L. Nair Hospital, Mumbai.
authors: Jyotsna
authors: J
authors: Joshi
mesh_terms: D002648:Child; D003937:Diagnosis, Differential; D019788:Fluorodeoxyglucose F18; D006801:Humans; D007074:Immunoglobulin G / Q000378:metabolism*; D008297:Male; D011014:Pneumonia / Q000000981:diagnostic imaging* / Q000378:metabolism / Q000628:therapy*; D000072078:Positron Emission Tomography Computed Tomography; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D007074:Immunoglobulin G; D019788:Fluorodeoxyglucose F18
keywords: 18F-FDG PET/CT; IgG4-related disease; corticosteroid therapy; inflammatory pseudotumor