Pseudolymphoma [Neurosurgery Wiki]

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====== Pseudolymphoma ======

{{rss>https://pubmed.ncbi.nlm.nih.gov/rss/search/10EkZzEWYAtiF9-NhciDoZnvQhfcrY0bjA-A3b1Jv2o6dAfQZB/?limit=15&utm_campaign=pubmed-2&fc=20230104083644}}

An 87-year-old man with a history of localized non-small cell lung cancer (NSCLC) was referred for evaluation and treatment of an elastic hard tumor in the left supraclavicular fossa one year after stereotactic ablative radiotherapy (SABR). Whole-body PET scan showed high 18F-fluorodeoxyglucose uptake in the left supraclavicular fossa, and a dia-gnosis of oligometastasis was made. The tumor was homogeneously high signal on T2-weighted image with homogeneous enhancement after contrast administration. Since the palpation and MRI findings were inconsistent with those of metastatic NSCLC, a bio-psy was performed. Pathological and immunohistochemical investigation revealed the lesion to be BLH.

Conclusion: In a patient with suspected oligometastasis after SABR for NSCLC, caution should be exercised before undergoing SABR for oligometastasis because BLH may be present
((Hama Y, Tate E. Benign lymphoid hyperplasia mimicking oligometastasis from non-small cell lung cancer after stereotactic ablative radiotherapy. Klin Onkol. 2022 Fall;35(6):482-485. English. doi: 10.48095/ccko2022482. PMID: 36513515.))