case_images: PMC10722187_01
case_images: Lung CT. The blue arrows refer to the lesions in lung image before and after treatment.
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case_images: f1
case_images: Multiple lymph nodes enlargement in the mediastinum (see  Figure 1 ). The double pneumonia lesions were absorbed than before (see  Figure 1 ).
case_images: Renal histopathology. The labels in (A, B) refer to the large cell crescent body and plasma cell infiltration in kidney pathology, while the labels in (C, D) refer to plasma cell infiltration and typical multinuclear giant cells in lung pathology.
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case_images: PMC10722187_01_fimmu-14-1298650-g002.jpg
case_images: f2
case_images: Light microscopy considered ANCA-associated vasculitis renal damage (with plasma cell infiltration), and crescent nephritis (crescent body: 11/13, macrocellular crescent body 6/11) were considered (see  Figures 2A, B ). Pathology of left inferior lobe mass on June 14, 2023: chronic granulomatous inflammation was considered, GPA cannot be excluded with abundant plasma cells can be seen in the tissue (see  Figures 2C, D ).
case_images: Medication flow chart.
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case_images: PMC10722187_01_fimmu-14-1298650-g003.jpg
case_images: f3
case_images: A telitacicept regimen (160 mg, qw) was also added (see  Figure 3 ).
case_images: Post-treatment effects. (A) creatinine and urea nitrogen; (B) CRP and ESR; (C) immunologic markers (IgG, IgA, IgM).
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case_images: PMC10722187_01_fimmu-14-1298650-g004.jpg
case_images: f4
case_images: The patient's hearing gradually returned to normal and creatinine gradually decreased to 130-140 umol/L (reference range 57-97 umol/L) (see  Figure 4A ). The levels of CRP and ESR decreased (see  Figure 4B ), while the levels of IgG, IgA and IgM gradually decreased (see  Figure 4C ).