Fibrosing inflammatory pseudotumors are an inflammatory process with histology showing a polymorphous infiltrate with plasma cells, lymphocytes and eosinophils as well as a significant reactive fibrovascular component.
On this page:
Pathology
Location
They can occur at various sites of the body including:
- skull base
- nasopharynx - fibrosing inflammatory pseudotumor of nasopharynx
- ear
- parotid glands
- pterygomaxillary space
Radiographic features
MRI
Fibrosing inflammatory pseudotumors may be seen as an infiltrative lesion with bone destruction.
- T2: usually hypointense due to fibrous components
Differential diagnosis
As the name suggests, fibrosing inflammatory pseudotumor can sometimes mimic malignancy.