Open Access

Pulmonary intravascular large B‑cell lymphoma successfully treated with rituximab, cyclophosphamide, vincristine, doxorubicin and prednisolone immunochemotherapy: Report of a patient surviving for over 1 year

  • Authors:
    • Shizuka Nishii‑Ito
    • Hiroki Izumi
    • Hirokazu Touge
    • Kenichi Takeda
    • Yuzuru Hosoda
    • Akira Yamasaki
    • Satoshi Kuwamoto
    • Eiji Shimizu
    • Toru Motokura
  • View Affiliations

  • Published online on: October 26, 2016     https://doi.org/10.3892/mco.2016.1063
  • Pages: 689-692
  • Copyright: © Nishii‑Ito et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

A 73-year-old man with a history of lethargy, fever and dyspnea was admitted to Tottori University Hospital. A computed tomography (CT) scan revealed splenomegaly and diffusely spreading ground‑glass opacities (GGOs) in both lungs. A video‑assisted thoracoscopic surgery (VATS)‑guided lung biopsy revealed intravascular proliferation of large atypical lymphoid cells in the arteries, veins and alveolar walls. The patient was diagnosed with intravascular large B‑cell lymphoma (IVLBCL); he received 6 cycles of rituximab, cyclophosphamide, doxorubicin, vincristine and prednisolone (R‑CHOP) immunochemotherapy and has remained in complete remission for >1 year. Although IVLBCL is a rare disease, it should be considered in the differential diagnosis of pulmonary diffuse lesions that present with GGOs on CT scans.

Introduction

Intravascular large B-cell lymphoma (IVLBCL) is a rare entity characterized by exclusive or predominant growth of neoplastic cells within the lumen of blood vessels. This disease was recently recognized as a subtype of diffuse large B-cell lymphoma by the World Health Organization (WHO) (1). The clinical presentation of IVLBCL varies widely due to occlusion of small vessels or capillaries in different organs. The most common clinical symptoms include fever, general fatigue, neurological manifestations and non-specific skin eruptions (2,3). Although autopsy findings have revealed that pulmonary involvement is also common in this disease, a primary presentation in the lung is uncommon and has rarely been described. In non-Hodgkin lymphoma (NHL), extranodal disease accounts for 24–50% of all cases, whereas only 34% of the cases include pulmonary lesions, with primary pulmonary lesions presenting in <1% of the patients (4). As early pulmonary IVLBCL diagnosis is difficult and treatment for pulmonary IVLBCL is less effective, the prognosis for the majority of the patients is poor (4). We herein report the case of a patient with pulmonary IVLBCL who was successfully treated with R-CHOP and has survived for >1 year.

Case report

A 73-year-old man visited a local clinic complaining of general malaise, dry cough, hoarseness, a 6-kg weight loss and fever. The patient was referred to our hospital, as no improvement was observed after 3 months. The patient's medical history was unremarkable, he had never smoked and had no history of occupational dust exposure. On admission, there were no enlarged superficial lymph nodes, skin lesions, or neurological abnormalities There were no abnormal findings on chest auscultation. Laboratory tests revealed the following results: Total leukocyte count, 5,400 cells/mm3 (69% neutrophils, 11% lymphocytes, 20% monocytes, 0% basophils and eosinophils); hemoglobin concentration, 11.6 g/dl; mean corpuscular volume, 82.5 fl; reticulocyte percentage, 8%; platelet count, 117,000/µl; C-reactive protein, 17.9 mg/dl; ferritin, 5,720 ng/ml; serum lactate dehydrogenase, 562 U/l; and soluble interleukin-2 receptor, 8,313 U/ml. Hypoxemia was also present, with an arterial oxygen tension of 53.2 Torr (room air). The pulmonary function test results were within normal limits, except for a reduction in the diffusion capacity of carbon monoxide (64.3% of the predicted value). There were no laboratory data suggestive of infection or autoimmune disease.

Chest radiography revealed diffusely spreading ground-glass opacities (GGOs) in both lungs, predominantly in the inferior lobes, but there were no signs of cardiac enlargement, pleural effusion, or enlarged mediastinal lymph nodes. Bilateral diffuse GGOs were also evident on computed tomography (CT) scans, but there were no signs of interlobular septal thickening or decreased volume. The spleen was also enlarged on CT (Fig. 1). Gallium scintigraphy also revealed diffuse and increased uptake in the lung field, as well as increased uptake in the spleen and splenomegaly.

At that point, the differential diagnosis included atypical pneumonia, eosinophilic pneumonia, hypersensitivity pneumonitis, pulmonary alveolar hemorrhage, pulmonary alveolar proteinosis and intravascular large B-cell lymphoma. However, a transbronchial lung biopsy (TBLB) could not be performed due to the patient's coughing. Antibiotic and steroid treatment was initiated, but the patient's general condition continued to deteriorate. A lung biopsy was then performed using video-assisted thoracoscopic surgery (VATS).

Histological examination of the bioptic specimen revealed several large atypical cells, mainly located within the small vessels and alveolar wall capillaries (Fig. 2A and D). These atypical cells also infiltrated an extravascular area of the stroma, with a patchy distribution in the enlarged interstitium throughout the lesion. Imunohistochemically, the atypical cells were positive for CD20 (Fig. 2B) but were negative for CD5 (Fig. 2C). Epstein-Barr virus (EBV)-encoded RNA in situ hybridization was also performed, but only a few positive cells were detected, ruling out involvement of EBV in this case. Bone marrow infiltration was not observed, although phagocytosis of neutrophils by macrophages was present at a very low frequency. The findings of the skin biopsy were unremarkable. Based on these findings, the patient was diagnosed with IVLBCL.

As respiratory failure was progressing rapidly, steroid pulse therapy and oral cyclophosphamide (100 mg per day for 6 days) were administered until the histological results became available. After diagnosis was confirmed, six courses of R-CHOP immunochemotherapy were administered. The GGOs in the lung field rapidly disappeared and the respiratory status improved (Fig. 3). A positron emission tomography (PET)/CT scan after the completion of the sixth course revealed no uptake in the lung or spleen and the patient remains alive and symptom-free for >1 year.

The patient has provided his consent regarding the publication of the case details.

Discussion

IVLBCL is characterized by proliferation of atypical lymphoid cells within the lumen of capillaries. IVLBCL is a rare variant of diffuse large B-cell lymphoma that has been included in the WHO classification (5). The central nervous system (CNS) and skin are usually involved. By contrast, IVLBCL patients in Asian countries often exhibit hepatosplenomegaly, thrombocytopenia and fever, but CNS and skin involvement are rare (6,7). In the present case, the patient exhibited findings typical of an Asian patient. In addition, several pulmonary IVLBCL cases were recently reported in Asia (24).

Recently, fluorodeoxyglucose (FDG)-PET/CT was shown to be useful for staging NHL (8), and several authors reported that FDG-PET/CT is a powerful tool for early diagnosis of IVLBCL (9); however, biopsy is essential. Due to its low invasiveness, TBLB is one of the most useful biopsy techniques for pulmonary lesions (4). In the present case, VATS-guided surgical biopsy was crucial, as TBLB could not be performed. If diffuse GGOs are present, IVLBCL should be included in the differential diagnosis, and a biopsy should be proactively performed.

The recommended treatment is systemic chemotherapy with an anthracycline-based regimen. However, the majority of IVLBCL cases are associated with poor prognosis. Recently, R-CHOP immunochemotherapy was shown to yield better results compared with CHOP (4,10,11). Our patient was treated with R-CHOP, and 1 year later there has been no recurrence. Pulmonary IVLBCL presenting with GGOs is exceedingly rare, but it should be considered in the differential diagnosis of respiratory disease presenting with GGOs.

Acknowledgements

The authors are deeply grateful to Hiroshige Nakamura and Tomohiro Haruki who performed the biopsy using VATS. We are also indebted to Shu Nakamoto for their invaluable comments.

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Spandidos Publications style
Nishii‑Ito S, Izumi H, Touge H, Takeda K, Hosoda Y, Yamasaki A, Kuwamoto S, Shimizu E and Motokura T: Pulmonary intravascular large B‑cell lymphoma successfully treated with rituximab, cyclophosphamide, vincristine, doxorubicin and prednisolone immunochemotherapy: Report of a patient surviving for over 1 year. Mol Clin Oncol 5: 689-692, 2016
APA
Nishii‑Ito, S., Izumi, H., Touge, H., Takeda, K., Hosoda, Y., Yamasaki, A. ... Motokura, T. (2016). Pulmonary intravascular large B‑cell lymphoma successfully treated with rituximab, cyclophosphamide, vincristine, doxorubicin and prednisolone immunochemotherapy: Report of a patient surviving for over 1 year. Molecular and Clinical Oncology, 5, 689-692. https://doi.org/10.3892/mco.2016.1063
MLA
Nishii‑Ito, S., Izumi, H., Touge, H., Takeda, K., Hosoda, Y., Yamasaki, A., Kuwamoto, S., Shimizu, E., Motokura, T."Pulmonary intravascular large B‑cell lymphoma successfully treated with rituximab, cyclophosphamide, vincristine, doxorubicin and prednisolone immunochemotherapy: Report of a patient surviving for over 1 year". Molecular and Clinical Oncology 5.6 (2016): 689-692.
Chicago
Nishii‑Ito, S., Izumi, H., Touge, H., Takeda, K., Hosoda, Y., Yamasaki, A., Kuwamoto, S., Shimizu, E., Motokura, T."Pulmonary intravascular large B‑cell lymphoma successfully treated with rituximab, cyclophosphamide, vincristine, doxorubicin and prednisolone immunochemotherapy: Report of a patient surviving for over 1 year". Molecular and Clinical Oncology 5, no. 6 (2016): 689-692. https://doi.org/10.3892/mco.2016.1063