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Acta Haematol ; 145(1): 18-29, 2022.
Article in English | MEDLINE | ID: mdl-34284379

ABSTRACT

Development of post-chemotherapy histiocyte-rich pseudotumor (PHP) is an underrecognized event following therapy in lymphoma patients and may mimic residual tumor using current therapy monitoring protocols. We report a series of 5 patients with PHP along with a review of the literature. In our series, we describe 3 patients with persistent hypermetabolic masses by positron emission tomography-computed tomography, one with persistent terminal ileal nodules on endoscopy, and one with bone marrow involvement, a site not associated with mass-like disease. Twenty-three patients with long-term follow-up were identified from our series and review of the literature. Forty-four percent of patients received additional therapy, and only 4% of patients died of lymphoma. This study illustrates that PHPs are not identified using current lymphoma therapy monitoring algorithms and may result in overtreatment with risk for additional therapy-related complications. The need for confirmatory tissue biopsy in this setting is recommended.


Subject(s)
Histiocytes , Lymphoma/diagnostic imaging , Positron Emission Tomography Computed Tomography , Aged , Child , Female , Humans , Male , Middle Aged , Neoplasm, Residual
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