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Aim
The spread of lung adenocarcinoma cells into the bronchi and bronchioles is not well documented. We termed this histological finding “endobronchial spreading of adenocarcinoma” (EBSA) and investigated its prevalence and clinical significance.
Methods and Results
We reviewed 320 resected specimens from patients diagnosed with invasive adenocarcinoma, and EBSA was observed in 144 patients (45%)...
Patients with plasma cell type idiopathic multicentric Castleman disease (PC‐iMCD) often show elevated serum IgG4 levels and IgG4‐positive cell infiltration in tissues due to overproduction of interleukin‐6, and may meet the diagnostic criteria for IgG4‐related disease (IgG4‐RD). Although PC‐iMCD has been listed as a major exclusion disease for IgG4‐RD, distinguishing between these diseases is challenging...
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