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Chinese Neurosurgical Journal

Open Access

Isolated intradural Rosai-Dorfman disease of the spine: report of two cases

  • Yu Xin1,
  • Hui Shen2,
  • Desheng Kong1,
  • Wenqing Jia1,
  • Hai Liu1 and
  • Jun Yang1Email author
Contributed equally
Chinese Neurosurgical Journal20162:13

https://doi.org/10.1186/s41016-016-0032-9

Received: 21 October 2015

Accepted: 3 May 2016

Published: 18 May 2016

The Erratum to this article has been published in Chinese Neurosurgical Journal 2016 2:19

Abstract

Background

Rosai-Dorfman disease (RDD) is an idiopathic histiocytic proliferative disorder characterized by sinus histiocytosis and massive lymphadenopathy. Extranodal and central nervous system (CNS) involvement is unusual. We describe two distinctly rare cases of isolated intradural RDD of the spine without cervical lymphadenopathy.

Case presentation

We report our experience in the management of two patients with RDD. The first patient had two ventral intradural lesions, radiologically in favour of multiple spinal meningiomas, and the second patient presented an intradural extramedually lesion, extending into the right foramina, suggestive of a sacral perineural cyst. Treatments consisted of total excision and subtotal excision without steroids and radiotherapy, respectively. The definitive diagnosis was confirmed by histopathology and immunochemistry.

Conclusions

RDD should be considered in the rare differential diagnosis of a spinal disease. Resection of the lesions is an effective treatment choice to relieve spinal compression symptoms. The efficacy of the adjuvant therapy to control the disease is unknown.

Keywords

Rosai-Dorfman diseaseSinus histiocytosis with massive lymphadenopathyMeningiomasSpinal cord

Background

Rosai-Dorfman disease (RDD) is an idiopathic histiocytic proliferative disorder characterized by sinus histiocytosis with massive lymphadenopathy [1]. Typical clinical presentation involves massive painless cervical lymphadenopathy, but extranodal disease is apparent in about 40 % of cases, most commonly involving the orbit, skin, respiratory tract, bones, kidneys, heart, and head and neck region [1, 2]. In less than 5 % of the cases, the central nervous system (CNS) is involved, with three fourths in brain and one fourth in spinal cord [3]. We describe two cases of isolated intradural RDD of the spine, and briefly review the literature.

Case presentation

Case 1

A 40-year-old man presented with a 6-month history of neck back pain and a 4-week history of bilateral lower-limb weakness. Neurological examination revealed a paraparesis (muscle power of grade 4/5) without a bilateral Babinski sign. General examination was unremarkable and the patient had no clinical evidence of lymphadenopathy.

A magnetic resonance image (MRI) showed 2 distinct ventral intradural lesions with similar characteristics, homogeneously isointense on T1-weighted as well as on T2-weighted images, with marked homogeneous enhancement after gadolinium administration. The extent of lesion was from C3 to C5 (3.3 cm × 1.2 cm, and C6 to C7 (0.8 cm × 0.9 cm). A dural tail was observed at the ventral dura (Fig. 1a-d). The patient’s chest x-ray was normal, and his white blood cell count, sedimentation rate and C reactive protein were within normal limits.
Fig. 1

Case 1. A preoperative MRI showing 2 distinct ventral, intradural and extramedullary lesions with homogeneously isointenseon both sagittal T1- and T2-weighted images (a and b), with marked homogeneous enhancement on the sagittal (c) and axial (d) after gadolinium administration. A dural tail was observed at the ventral dura. Case 2.A preoperative MRI showing a S1/2 level extramedullary lesion with similar isointenseon both sagittal T1- and T2-weighted images (e and f), and slight heterogeneous enhancement on the sagittal (g) and axial (h) after gadolinium administration

A C3-C6 laminectomy was performed, allowing complete resection of both intradural lesions without manipulation of the spinal cord. The lesions were pinkish-gray, and encasing the ventral dura. Histological study of the lesions revealed large lymphoplasmacytic areas embedded with sheets of multinucleated histiocytic cells. The histiocytic cells showed evidence of emperipolesis, CD68 and S100 immunopositivity, and negative labeling for CD1a. These characteristics were compatible with Rosai-Dorfman disease.

Since a complete resection of the mass was performed and lymphadenopathy was not observed, radiation and chemotherapy were not performed. The patient has been followed up for 2 years with no new complaints, and with improving neurologic deficits.

Case 2

A 14-year-old female presented to our outpatient clinic with a 4-month history of intermittent pain in her both lower extremities. No bowel or bladder symptoms had been reported. She had hyporeflexia in the right lower limb. The rest of her neurological and systemic examinations were unremarkable. Routine hematologic tests were within reference range.

Preoperative MRI images of the patient’s lumbosacral spine indicated intradural lesion (about 2.5 cm × 2.2 cm), extending into the right foramina at the S1/2 level. This lesion presented with similar isointense on both T1- and T2-weighted MR images, with marked slight heterogeneous enhancement after gadolinium administration (Fig. 1e-h). Routine hematologic and biochemical tests were within reference range. Computed tomography of the chest and abdomen showed no significant lymphadenopathy. It was provisionally diagnosed as a sacral perineural cyst.

The patient underwent a S1-2 laminectomy to reveal a firm pink-gray intradural lesion extending into the right foramina at the S1/2 level. The lesion encased and compressed the right S1 nerve root. Based on the need to protect the patient’s neurological functions, the lesion was partially removed under spinal evoked-potential monitoring. A histopathological examination revealed that aggregates of pale-staining foamy histiocytes phagocytosed lymphocytes and plasma cells in a background of collagen and reticulin fiber. Immunohistochemistry revealed that the lesional histiocytes were positive for CD68, and S-100 but negative for CD1a by immunohistochemistry, distinguishing this disorder from Langerhans cell histiocytosis. Thus confirming the diagnosis of RDD (Fig. 2a-c).
Fig. 2

Histopathology shows a lesion composed of dilated spaces filled with histiocytes admixed with lymphocytes and plasma cells (a: hematoxy-eosin stain, Original magnification × 200). The histiocytic cells show strong immunoreactivity for S100 and CD68 (b, c: Original magnification × 200)

The patient had an uneventful postoperative course. At 2-month post-operation, follow-up physical examination disclosed that her lower extremity pain had gradually disappeared and reflexes were normal. Subsequently regular clinical and imaging follow-up over the next 1 years showed no signs or symptoms of recurrence.

Discussion

Sinus histiocytosis with massive lymphadenopathy was first described by Rosai and Dorfman in 1969 [2]. The etiology of RDD remains unknown. RDD is hypothesized to occur secondary to an abnormal immunological response or an infectious factor. Recent studies suggested that infective agents like HHV-6 and Parvo B19 might be the causative factors [4]. RDD is characterized by massive, painless cervical lymphadenopathy variably associated with fever, leukocytosis, elevated erythrocyte sedimentation rate and weight loss. RDD of the nervous system has also been reported, and most cases involve the brain [5]. Spinal cord involvement such as intramedullary, intradural and extradural is apparently very rare in RDD [610]. Over 90 % of CNS RDD involves the leptomeninges. In neuroimaging it is seen as a dural-based, contrast-enhancing lesion. Thus, clinically and radiologically, the disease is thought to represent meningioma. In the first case, the lesions were confined to the intradural extramedullary of the cervical spine, which were provisionally diagnosed as multiple spinal meningiomas [79]. As in the present of the second case, isolated intradural RDD of the lumbosacral spine, extending into the right foramina at the S1/2 level is extremely rare.

The MRI features of isolated RDD were variable and could be misleading. In most cases, as in the present patients, the signals of the lesion ranged from iso- to hypointensity on T1 weighted images, and iso- to hyperintensity on T2 weighted images, and exhibits an intense and uniform enhancement after gadolinium administration [1, 3, 68, 1013]. MR images are usually indistinguishable from other more common lesions in the extradural spinal space such as meningioma [7, 9, 14], lymphoma, and sarcoma [6]. RDD displayed neuroimaging features typical of meningioma with a dural tail. There are no pathognomonic radiographic marks to suggest a particular preoperative diagnosis. Therefore, the definitive diagnosis of RDD relies on histopathological examination, and the immunochemical analyses contribute to determining the final diagnosis [15].

The characteristic histopathological pattern of RDD is emperipolesis, which refers to phagocytosis of intact lymphocytes by macrophages. Large histiocytes of RDD are immunoreactive for S100 protein and CD68, but not for CD1a. This feature helps to distinguish from Langerhans cell histiocytosis, which is positive for CD1a [16].

The natural history of RDD has been reported to be benign with spontaneous remission. In some patients, however, rapid disease progression, multisystem involvement, and even fatal outcomes have been described [1, 2]. In case of persistent or progressive disease, a number of adjuvant therapies have been administered with variable success, including radiotherapy and chemotherapy with corticosteroids, 6-mercaptopurine and methotrexate [17]. Administration of steroids often resolve fever and reduce lymph node size. Radiation or chemotherapy has been shown to be beneficial in achieving complete remission in 33.3 % or 16.6 % of cases [18]. Resection of the lesions is an effective treatment choice to relieve spinal compression symptoms. There is no established systemic treatment protocol for RDD, since it is a rare disease presenting with different clinical features. Because the patients had improved neurological course after surgery, adjuvant treatments with chemotherapy or radiotherapy are unnecessary until disease progression is detected.

Conclusions

In summary, we present two cases of isolated intradural RDD of the spine. It should be considered among the rare differential diagnosis of intradural cord compression. Resection of the lesions is an effective treatment choice to relieve spinal compression symptoms. The efficacy of the adjuvant therapy to control the disease is unknown.

Consent

Written informed consent was obtained from the patient for publication of this case report and any accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal.

Notes

Abbreviations

CNS: 

Central nervous system

MRI: 

Magnetic resonance image

RDD: 

Rosai-Dorfman disease

Declarations

Acknowledgements

The authors have no personal financial or institutional interest in any of the drugs, materials, or devices described in this article.

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

Authors’ Affiliations

(1)
Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University
(2)
Department of Neurosurgery, Beijing Pinggu Hospital

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Copyright

© Xin et al. 2016

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