Inflammatory pseudotumor

An inflammatory pseudotumor is a cell proliferation and inflammation involving spindle cells, which may occur in many parts of the body, and is of unknown case.

According to the WHO classification, three lesional patterns can be observed:

Inflammatory myofibroblastic tumour, that can be associated with an ALK gene rearrangement
Plasmocytic pattern ("plasma cell granuloma"), that can be linked to IgG4-related disease
Fibrous and hyalinizing pattern: Pulmonary hyalinizing granuloma

References

↑ Gnepp, Douglas R.; Bishop, Justin A. (5 May 2020). Gnepp's Diagnostic Surgical Pathology of the Head and Neck. Elsevier Health Sciences. p. 984. ISBN 978-0-323-54780-2.

This oncology article is a stub. You can help Wikipedia by adding missing information.