Splenic inflammatory pseudotumor-like follicular dendritic cell sarcoma: a case report with imaging features and literature review.

ABSTRACT:

Background

Follicular dendritic cell sarcoma (FDCS) is an extremely rare malignant neoplasm originating from immune follicular dendritic cells. Its inflammatory pseudotumor-like subtype (IPT-like FDCS) is even more uncommon due to morphological overlap with inflammatory pseudotumors. We report a case of splenic IPT-like FDCS and perform a systematic literature review to clarify the multimodal imaging characteristics of this rare entity.

Case presentation

A 50-year-old asymptomatic man had an incidentally detected splenic mass during routine health screening. Ultrasound showed a well-defined hypoechoic splenic lesion. Magnetic resonance imaging revealed slightly hyperintense signals on both T1- and T2-weighted images, with progressive inhomogeneous enhancement and a periphera

SUBMITTER: Shang R 

PROVIDER: S-EPMC12933194 | biostudies-literature | 2026

REPOSITORIES: biostudies-literature