Primary iliac bone lymphoma with multiple bone involvement evaluated by 18 fluorodeoxyglucose positron emission tomography: A case report

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Taieb Ben Ghachem
Rihen Belayouni
Lamia Zaabar
Ihsen Slim
Aida Mhiri

Abstract

Introduction: Involvement of bone by lymphoma usually occurs in the setting of widespread systemic disease. The primary bone lymphoma
(PBL) is a rare entity, accounting for 3 to 7% of primary malignant bone tumors and less than 2% of all lymphomas. The Multifocal
forms are even rarer and can be confused with bone metastases. The diagnosis is guided by the clinic and radiology, but only the histology
confirms accurate diagnosis.
Observation: We report a rare case of primitive iliac lymphoma in a 58-year-old man. The pathological study was in favor of a diffuse large
B-cell lymphoma. An 18 fluorodesoxyglucose (FDG) positron emission tomography computed tomography (PET/CT) performed as part of the
staging assessment revealed multifocal bone involvement.
Conclusion: This case highlights the importance to evoke the diagnosis of primary bone lymphoma, even if it presents in an unusual site, as
well as the value of metabolic imaging in assessing the extent of the disease.

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