Lymph nodes (A-B: peri-tracheal, C-D: peri-choledochal). A: An IPT-like fibrotic nodule is seen. B: At high magnification, plasma cell and eosinophil infiltrates are seen around the IPT-like nodule with storiform pattern fibrosis. C-D: Obstructive phlebitis is seen in a peri-choledochal lymph node.
Fujii et al. Diagnostic Pathology 2014 9:41 doi:10.1186/1746-1596-9-41