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A case of difficult-to-diagnose hepatic reactive lymphoid hyperplasia finally diagnosed by using PCR analysis of IgH-gene rearrangements: a case report

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Abstract

Reactive lymphoid hyperplasia (RLH) of the liver is extremely rare. Despite advancements in diagnostic imaging technology, it is still difficult to distinguish from hepatocellular carcinoma (HCC). Herein, we present a case of hepatic RLH mimicking HCC that was postoperatively diagnosed using several imaging modalities. A 78-year-old female was referred to our hospital with a positive hepatitis C virus antibody (HCV Ab) test. Ultrasonography revealed a 13 mm isoechoic lesion in segment 8 of the liver. Contrast-enhanced computed tomography (CE-CT) demonstrated arterial hyperintensity and washout during the later phase. On ethoxybenzyl magnetic resonance imaging (EOB-MRI), the lesion was hyperenhanced in the arterial phase and of low intensity in the hepatocyte phase. Although the tumor markers were all within normal limits, the pattern of contrast enhancement of the tumor on CT and MRI was consistent with that of HCC. We performed S8 segmentectomy of the liver. Histological examination of the resected specimen revealed dense lymphoid tissue of variable sizes and shapes with expanded germinal centers. Immunohistochemical examination was positive for CD3, CD10 (germinal center), and CD20, and negative for B-cell lymphoma 2 (bcl-2) (germinal center) and Epstein–Barr virus (EBV). A polymerase chain reaction (PCR) analysis of IgH-gene rearrangements revealed polyclonality. Based on these findings, hepatic RLH was diagnosed. The postoperative course was uneventful, and the patient was discharged on the 10th postoperative day. She had a good quality of life after surgery and no liver nodule recurrence was detected at the 4-month medical follow-up. Hepatic RLH is an extremely rare disease and preoperative diagnosis is difficult. This should be considered in the differential diagnosis of single small hepatic tumors. An echo-guided biopsy and careful observation of imaging may help diagnose hepatic RLH, and a PCR analysis of IgH-gene rearrangements would be necessary for the definitive diagnosis of hepatic RLH.

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The authors declare that all the data in this article are available within the article.

Abbreviations

RLH:

Reactive lymphoid hyperplasia

HCC:

Hepatocellular carcinoma

CE-CT:

Contrast-enhanced computed tomography

EOB-MRI:

Ethoxybenzyl magnetic resonance imaging

Bcl-2:

B-cell lymphoma 2

EBV:

Epstein–Barr virus

PCR:

Polymerase chain reaction

DWI:

Diffusion-weighted imaging

ICG-R15:

Indocyanine green retention rate at 15 min

CEA:

Carcinoembryonic antigen

CA19-9:

Carbohydrate antigen 19–9

AFP:

Alpha-fetoprotein

PIVKA-II:

Protein induced by vitamin K absence-II

US:

Ultrasonography

IgH:

Immunoglobulin heavy chain

PNE:

Perinodular enhancement

PET-CT:

Positron emission tomography–Computed tomography

SUVmax:

Standardized uptake value max

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Acknowledgements

We would like to thank Editage (www.editage.com) for English language editing.

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Contributions

JM reported the case and wrote the manuscript. KY, TM, ST were engaged in the patient’s care including the surgery. ET helped in drafting the manuscript. TM participated in revising the manuscript critically. All authors have read and approved the final manuscript for publication.

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Correspondence to Takashi Maeda.

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Mita, J., Maeda, T., Tsujita, E. et al. A case of difficult-to-diagnose hepatic reactive lymphoid hyperplasia finally diagnosed by using PCR analysis of IgH-gene rearrangements: a case report. Int Canc Conf J 13, 33–39 (2024). https://doi.org/10.1007/s13691-023-00632-8

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  • DOI: https://doi.org/10.1007/s13691-023-00632-8

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