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Biswas A, Ramdulari AV, Thakur A, Kumar A, G S A, Jana M, Suri V. Successful multimodality management of extrarenal extracranial malignant rhabdoid tumour of the left sciatic nerve mimicking a neurofibroma. Br J Neurosurg 2024; 38:978-982. [PMID: 34553668 DOI: 10.1080/02688697.2021.1981245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Accepted: 09/12/2021] [Indexed: 10/20/2022]
Abstract
Extrarenal extracranial malignant rhabdoid tumour (MRT) is a rare and highly aggressive tumour representing <1% of paediatric soft tissue malignancies. Only a few cases of MRT of the thigh arising from the sciatic nerve have been reported in medical literature to date. A 5-year-old girl presented with progressively increasing painless lump in the posterior aspect of the left thigh. A contrast-enhanced magnetic resonance imaging (MRI) of the left thigh showed a 4.7 × 5 × 10.5 cm well-marginated, lobulated, homogeneously enhancing lesion in the posterior compartment of the left thigh along the course of the sciatic nerve. She underwent en bloc excision of the left sciatic nerve tumour and end-to-end anastomosis of the left sciatic nerve with a right sural nerve graft. Histopathological and immunohistochemical examination of the surgical specimen revealed a malignant rhabdoid tumour. INI-1 immunoexpression was lost in the tumour cells. The metastatic workup was essentially normal. Subsequently, she received post-operative radiotherapy to the tumour bed (50.4 Gray in 28 fractions over 5.5 weeks) followed by six cycles of multiagent chemotherapy with ICE (Ifosfamide, Carboplatin, and Etoposide) regimen. On the last follow-up visit, 20 months after surgery, she was in complete clinical and radiological response. Aggressive multimodality management comprising radical resection of tumour, post-operative radiotherapy to the tumour bed, and multiagent chemotherapy with ICE regimen can lead to favourable outcomes in patients with this rare tumour.
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Affiliation(s)
- Ahitagni Biswas
- Department of Radiotherapy & Oncology, All India Institute of Medical Sciences, New Delhi, India
| | - Anjali V Ramdulari
- Department of Radiotherapy & Oncology, All India Institute of Medical Sciences, New Delhi, India
| | - Alok Thakur
- Department of Radiotherapy & Oncology, All India Institute of Medical Sciences, New Delhi, India
| | - Amandeep Kumar
- Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India
| | - Anju G S
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
| | - Manisha Jana
- Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, India
| | - Vaishali Suri
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, India
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2
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Vaishya S, Pojskic M, Bedi MS, Oertel J, Sippl C, Robertson S, Zygourakis C. Cauda equina, conus medullaris and syndromes mimicking sciatic pain: WFNS spine committee recommendations. World Neurosurg X 2024; 22:100274. [PMID: 38496349 PMCID: PMC10943478 DOI: 10.1016/j.wnsx.2024.100274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 02/01/2024] [Indexed: 03/19/2024] Open
Abstract
Introduction Cauda equina syndrome (CES), conus medullaris syndrome (CMS), and sciatica-like syndromes or "sciatica mimics" (SM) may present as diagnostic and/or therapeutic dilemmas for the practicing spine surgeon. There is considerable controversy regarding the appropriate definition and diagnosis of these entities, as well as indications for and timing of surgery. Our goal is to formulate the most current, evidence-based recommendations for the definition, diagnosis, and management of CES, CMS, and SM syndromes. Methods We performed a systematic literature search in PubMed from 2012 to 2022 using the keywords "cauda equina syndrome", "conus medullaris syndrome", "sciatica", and "sciatica mimics". Standardized screening criteria yielded a total of 43 manuscripts, whose data was summarized and presented at two international consensus meetings of the World Federation of Neurosurgical Societies (WFNS) Spine Committee. Utilizing the Delphi method, we generated seven final consensus statements. Results and conclusion s: We provide standardized definitions of cauda equina, cauda equina syndrome, conus medullaris, and conus medullaris syndrome. We advocate for the use of the Lavy et al classification system to categorize different types of CES, and recommend urgent MRI in all patients with suspected CES (CESS), considering the low sensitivity of clinical examination in excluding CES. Surgical decompression for CES and CMS is recommended within 48 h, preferably within less than 24 h. There is no data regarding the role of steroids in acute CES or CMS. The treating physician should be cognizant of a variety of other pathologies that may mimic sciatica, including piriformis syndrome, and how to manage these.
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Affiliation(s)
- Sandeep Vaishya
- Department of Neurosurgery, Fortis Memorial Research Institute, Guragaon and Fortis Hospital Vasant Kunj, New Delhi, India
| | - Mirza Pojskic
- Department of Neurosurgery, University of Marburg, Germany
| | - Manbachan Singh Bedi
- Department of Neurosurgery, Fortis Memorial Research Institute, Guragaon and Fortis Hospital Vasant Kunj, New Delhi, India
| | - Joachim Oertel
- Department of Neurosurgery, Saarland University Medical Centre, Homburg, Germany
| | - Christoph Sippl
- Department of Neurosurgery, Saarland University Medical Centre, Homburg, Germany
| | - Scott Robertson
- Dept of Neurosurgery, Ochsner Medical Center Baton Rouge, USA
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Shomal Zadeh F, Khan AK, Pooyan A, Alipour E, Azhideh A, Chalian M. Sciatic diffuse large B-cell lymphoma with treatment response to CHOP and radiotherapy. Radiol Case Rep 2024; 19:207-212. [PMID: 38028295 PMCID: PMC10651427 DOI: 10.1016/j.radcr.2023.10.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 10/02/2023] [Accepted: 10/08/2023] [Indexed: 12/01/2023] Open
Abstract
Neurolymphomatosis is an uncommon presentation of lymphoma caused by the infiltration of the peripheral nervous system by lymphoid cells. Here, we describe a case of neurolymphomatosis of the sciatic nerve in 41-year-old woman, which presented by acute onset pain and progress to paresthesia and weakness. Magnetic resonance imaging (MRI) revealed lobulated mass involving the right sciatic nerve with central necrosis and mild surrounding edema, which was isointense on T1-weighted images, hyperintense on short tau inversion recovery (STIR). Positron emission tomography and computed tomography (PET-CT) showed centrally necrotic mass with avid fluorodeoxyglucose (FDG) uptake in the right sciatic nerve. Partial resection of the tumor was done, and the diagnosis of the diffuse large B-cell lymphoma was made and confirmed by bone marrow biopsy. Patient was treated with R-CHOP chemotherapy (regimen consisting of cyclophosphamide, doxorubicin, prednisone, rituximab, and vincristine) and radiotherapy.
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Affiliation(s)
- Firoozeh Shomal Zadeh
- Musculoskeletal Imaging and Intervention, Department of Radiology, University of Washington, 4245 Roosevelt Way NE, Box 354755, Seattle, WA 98105, USA
| | - Ayimen Khalid Khan
- Musculoskeletal Imaging and Intervention, Department of Radiology, University of Washington, 4245 Roosevelt Way NE, Box 354755, Seattle, WA 98105, USA
| | - Atefe Pooyan
- Musculoskeletal Imaging and Intervention, Department of Radiology, University of Washington, 4245 Roosevelt Way NE, Box 354755, Seattle, WA 98105, USA
| | - Ehsan Alipour
- Musculoskeletal Imaging and Intervention, Department of Radiology, University of Washington, 4245 Roosevelt Way NE, Box 354755, Seattle, WA 98105, USA
| | - Arash Azhideh
- Musculoskeletal Imaging and Intervention, Department of Radiology, University of Washington, 4245 Roosevelt Way NE, Box 354755, Seattle, WA 98105, USA
| | - Majid Chalian
- Musculoskeletal Imaging and Intervention, Department of Radiology, University of Washington, 4245 Roosevelt Way NE, Box 354755, Seattle, WA 98105, USA
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Lefebvre G, Le Corroller T. Ultrasound and MR imaging of peripheral nerve tumors: the state of the art. Skeletal Radiol 2023; 52:405-419. [PMID: 35713690 DOI: 10.1007/s00256-022-04087-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 05/09/2022] [Accepted: 05/30/2022] [Indexed: 02/02/2023]
Abstract
Peripheral nerve sheath tumors are a heterogeneous subgroup of soft tissue tumors that either arise from a peripheral nerve or show nerve sheath differentiation. On imaging, direct continuity with a neural structure or location along a typical nerve distribution represents the most important signs to suggest the diagnosis. Ultrasound and magnetic resonance imaging are the best modalities to evaluate these lesions. First, it is necessary to differentiate between a true tumor and a non-neoplastic nerve condition such as a neuroma, peripheral nerve ganglion, intraneural venous malformation, lipomatosis of nerve, or nerve focal hypertrophy. Then, with a combination of clinical features, conventional and advanced imaging appearances, it is usually possible to characterize neurogenic tumors confidently. This article reviews the features of benign and malignant peripheral nerve sheath tumors, including the rare and recently described tumor types. Furthermore, other malignant neoplasms of peripheral nerves as well as non-neoplastic conditions than can mimick neurogenic tumor are herein discussed.
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Affiliation(s)
- Guillaume Lefebvre
- Service de Radiologie Et d'Imagerie Musculosquelettique, Centre de Consultation Et d'Imagerie de L'Appareil Locomoteur, CHRU de Lille, Rue Emile Laine, 59037, Lille, France
| | - Thomas Le Corroller
- Radiology Department, APHM, Hôpital Sainte-Marguerite, 270 Bd de Sainte-Marguerite, 13009, Marseille, France. .,ISM UMR 7287, Aix Marseille University, CNRS, Marseille, France.
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5
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He L, Zhang YJ, He SL, Zhang JR, Wu J, Zhang GF, Wang DL. Sciatic nerve schwannoma complicated by nerve bundle membrane effusion: Two case reports and a literature review. Front Oncol 2022; 12:915982. [PMID: 36185299 PMCID: PMC9516277 DOI: 10.3389/fonc.2022.915982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 08/19/2022] [Indexed: 11/26/2022] Open
Abstract
Schwannoma is a benign tumor that originates from Schwann cells in the peripheral nerve tunica or bundle of nerves and grows along the longitudinal axis of the nerve. Schwannoma can occur in multiple anatomic locations but rarely in the sciatic nerve. To our knowledge, there are no previous reports in the literature related to schwannoma combined with effusion of the nerve bundle membranes. Here, we report two cases of sciatic nerve schwannoma combined with nerve bundle membrane effusion, and the relationship between them is uncertain. We have boldly speculated about this uncertain relationship by combining the two patients’ imaging manifestations to help determine the mechanism of schwannoma or effusion generation as well as a clinical treatment.
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Affiliation(s)
- Lian He
- Department of Radiology, The Second Affiliated Hospital of Zunyi Medical University, Zunyi, China
- Department of Radiology, The First People’s Hospital of Zunyi, The Third Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Yan-Ji Zhang
- Department of Burn Plastic Surgery, The Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Shi-Li He
- Department of Radiology, The Second Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Jia-Ren Zhang
- Department of Radiology, The First People’s Hospital of Zunyi, The Third Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Jun Wu
- Department of Radiology, The Second Affiliated Hospital of Zunyi Medical University, Zunyi, China
- Department of Radiology, The First People’s Hospital of Zunyi, The Third Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Gao-Feng Zhang
- Department of Radiology, The Second Affiliated Hospital of Zunyi Medical University, Zunyi, China
- *Correspondence: Gao-Feng Zhang, ; Da-Li Wang,
| | - Da-Li Wang
- Department of Burn Plastic Surgery, The Affiliated Hospital of Zunyi Medical University, Zunyi, China
- *Correspondence: Gao-Feng Zhang, ; Da-Li Wang,
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Comparison of Isolated Sciatic Nerve and Sacral Nerve Root Endometriosis: A Review of the Literature. J Minim Invasive Gynecol 2022; 29:943-951. [DOI: 10.1016/j.jmig.2022.05.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 05/17/2022] [Accepted: 05/25/2022] [Indexed: 10/18/2022]
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Riecke J, Chhabra A, Burns D, Trivedi JR. Port-Wine Stain and Monomelic Weakness Associated With Perineurioma: A Neuromuscular Image. J Clin Neuromuscul Dis 2022; 23:156-159. [PMID: 35188914 DOI: 10.1097/cnd.0000000000000354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
| | | | - Dennis Burns
- Pathology, UT Southwestern Medical Center, Dallas, TX
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Wakefield CJ, Hamid KS, Lee S, Lin J, Holmes GB, Bohl DD. Transfer of the Posterior Tibial Tendon for Chronic Peroneal Nerve Palsy. JBJS Rev 2021; 9:01874474-202107000-00014. [PMID: 34297700 DOI: 10.2106/jbjs.rvw.20.00208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
» The common peroneal nerve (CPN) is one of the most frequently injured nerves of the lower extremity. » One-third of patients who develop CPN palsy proceed to chronic impairment without signs of recovery. » Ankle-foot orthoses can provide improvement with respect to gait dysfunction and are useful as a nonsurgical treatment option. » Severe cases of CPN palsy demonstrating no signs of recovery may require operative intervention with tendon transfer.
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Affiliation(s)
- Connor J Wakefield
- Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois
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Gandhi J, Wilson AL, Liang R, Weissbart SJ, Khan SA. Sciatic endometriosis: A narrative review of an unusual neurogynecologic condition. JOURNAL OF ENDOMETRIOSIS AND PELVIC PAIN DISORDERS 2020. [DOI: 10.1177/2284026520970813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Endometriosis is a condition in which there is an ectopic growth of endometrial tissue. Sciatic endometriosis, otherwise known as catamenial sciatica, is a rare but exceedingly significant presentation of endometriosis. Symptoms include cyclic sciatic pain that peaks during the menstrual period; additionally, paresthesia, paresis, and areflexia may occur with this condition. Sciatic endometriosis can be presumptively diagnosed in response to empiric treatment (e.g. gonadotropin-releasing hormone analogs) or imaging studies, but a definitive diagnosis of sciatic endometriosis may occur from examining tissue obtained during surgery. Surgical removal of endometriosis from the sciatic nerve root can potentially eliminate symptoms while maintaining normal reproductive function, though poses particular surgical risks. Familiarity with this rare condition is paramount to making this diagnosis and the initiation of earlier treatment.
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Affiliation(s)
- Jason Gandhi
- Department of Physiology and Biophysics, Renaissance School of Medicine at Stony Brook University, Stony Brook, NY, USA
- Medical Student Research Institute, St. George’s University School of Medicine, Grenada, West Indies
| | - Anthony L Wilson
- School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Raymond Liang
- Department of Physiology and Biophysics, Renaissance School of Medicine at Stony Brook University, Stony Brook, NY, USA
| | - Steven J Weissbart
- Department of Urology, Renaissance School of Medicine at Stony Brook University, Stony Brook, NY, USA
- Women’s Pelvic Health & Continence Center, Renaissance School of Medicine at Stony Brook University, Stony Brook, NY, USA
| | - Sardar Ali Khan
- Department of Physiology and Biophysics, Renaissance School of Medicine at Stony Brook University, Stony Brook, NY, USA
- Department of Urology, Renaissance School of Medicine at Stony Brook University, Stony Brook, NY, USA
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10
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Maldonado AA, Spinner RJ, Broski SM, Stone JJ, Howe BM, Carter JM. Neuromuscular choristoma-associated desmoid-type fibromatosis: Establishing a nerve territory concept. Acta Neurochir (Wien) 2020; 162:1137-1146. [PMID: 31897730 DOI: 10.1007/s00701-019-04178-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 12/12/2019] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Desmoid-type fibromatosis (DTF) frequently arises in patients with neuromuscular choristoma (NMC). We hypothesize that NMC-associated DTF occurs in soft tissues innervated by the NMC-affected nerve, and arises from CTNNB1-mutated (myo) fibroblasts within or directly adjacent to the NMC. MATERIALS AND METHODS A retrospective review of patients treated at our institution was performed for patients with biopsy-confirmed diagnosis of NMC-DTF. Clinical presentation, physical examination, electrodiagnostic findings and radiological features (MR and FDG PET/CT images for each NMC-DTF) and pathologic re-review of available materials were analyzed. A literature review was also performed. RESULTS Eight patients from our institution met the inclusion criteria. All patients presented with neuropathic symptoms and soft tissue or bone changes in the nerve territory innervated by the NMC. All MR images (N=8 cases) showed the characteristic features of NMC, and also showed direct contact between unifocal (N=5) or multifocal (N=3) DTF(s) and the NMC-affected nerve NMC. FDG PET/CT (N=2 cases) showed diffuse, increased FDG uptake along the entire affected nerve segment, contiguous with the FDG-avid DTF. In all cases, the DTFs arose in the soft tissues of the NMC-affected nerve's territory. No patient developed DTF at any other anatomic site. CONCLUSIONS These data demonstrate that NMC-DTF arises solely within the NMC-affected nerve territory, and has direct contact with the NMC itself. Based on all these findings and the multifocality of NMC in several cases, we recommend imaging and surveillance of the entire NMC-affected nerve (from spine to distal extremity) to identify clinically-occult DTF in patients with NMC.
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Affiliation(s)
- Andrés A Maldonado
- Department of Neurosurgery, Mayo Clinic, 200 1st St. SW, Rochester, MN, 55905, USA
| | - Robert J Spinner
- Department of Neurosurgery, Mayo Clinic, 200 1st St. SW, Rochester, MN, 55905, USA.
| | - Stephen M Broski
- Department of Radiology, Mayo Clinic, 200 1st St. SW, Rochester, MN, 55905, USA
| | - Jonathan J Stone
- Department of Neurosurgery, Mayo Clinic, 200 1st St. SW, Rochester, MN, 55905, USA
| | - B Matthew Howe
- Department of Radiology, Mayo Clinic, 200 1st St. SW, Rochester, MN, 55905, USA
| | - Jodi M Carter
- Department of Laboratory Medicine and Pathology, Mayo Clinic, 200 1st St. SW, Rochester, MN, 55905, USA
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11
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Sciatic Nerve Palsy following Curved Periacetabular Osteotomy. Case Rep Orthop 2020; 2020:8569285. [PMID: 32257486 PMCID: PMC7106866 DOI: 10.1155/2020/8569285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 02/19/2020] [Accepted: 03/02/2020] [Indexed: 11/17/2022] Open
Abstract
Curved periacetabular osteotomy (CPO) is used for the treatment of dysplastic hips. Previous studies have reported satisfying outcomes and low rate of severe complications associated with this procedure; however, no case of postoperative sciatic nerve palsy has been reported. In this study, we describe a case of postoperative sciatic nerve palsy following CPO due to nerve strangulation by scar tissue without direct injury. A female patient had severe buttock pain and posterior leg numbness after she underwent left-side CPO. Postoperative magnetic resonance imaging showed that the sciatic nerve was strangulated by the surrounding soft tissue. There was no bone fragment, active infection, bone necrosis, tumor, or spine disease. Therefore, we diagnosed nerve palsy by soft tissue strangulation, and revision surgery was indicated. During revision surgery, the sciatic nerve was observed to be strangulated by the scarring soft tissue, and the nerve had no mobility. After detachment, the pain and numbness disappeared. Direct injury of the sciatic nerve should not be caused by CPO; however, there is a possibility of postoperative sciatic nerve palsy due to the scarring soft tissue. Early diagnosis and appropriate treatment are important for optimal postoperative clinical outcomes.
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12
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Extrapelvic Sciatic Nerve Endometriosis, the Role of Magnetic Resonance Imaging: Case Report and Systematic Review. J Comput Assist Tomogr 2019; 43:976-980. [PMID: 31688247 DOI: 10.1097/rct.0000000000000916] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Endometriosis (EN) is a common gynecological condition characterized by the presence of functional endometrium located outside the uterine cavity. Sciatic nerve (SN) is rarely affected by EN. Magnetic resonance imaging allows a direct visualization of the spinal and SN, and it is the modality of choice for the study of SN involvement in extrapelvic EN. We report a case of an endometrioma located in the right SN with a systematic review of the literature.
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13
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Stone JJ, Prasad NK, Laumonerie P, Howe BM, Amrami KK, Carter JM, Jentoft ME, Spinner RJ. Recurrent desmoid-type fibromatosis associated with underlying neuromuscular choristoma. J Neurosurg 2019; 131:175-183. [PMID: 30168738 DOI: 10.3171/2018.3.jns152935] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 03/21/2018] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Desmoid-type fibromatosis (DTF) presents a therapeutic dilemma. While lacking metastatic potential, it is a locally aggressive tumor with a strong propensity for occurrence near nerve(s) and recurrence following resection. In this study, the authors introduce the association of an occult neuromuscular choristoma (NMC) identified in patients with DTF. METHODS After experiencing a case of DTF found to have an occult NMC, the authors performed a retrospective database review of all other cases of biopsy-proven DTF involving the extremities or limb girdles in patients with available MRI data. Two musculoskeletal radiologists with expertise in peripheral nerve imaging reviewed the MRI studies of the eligible cases for evidence of previously unrecognized NMC. RESULTS The initial case of a patient with an occult sciatic NMC is described. The database review yielded 40 patients with DTF-18 (45%) in the upper limb and 22 (55%) in the lower limb. Two cases (5%) had MRI findings of NMC associated with the DTF, one in the proximal sciatic nerve and the other in the proximal tibial and sural nerves. CONCLUSIONS The coexistence of NMC may be under-recognized in a subset of patients with extremity DTF. This finding poses implications for DTF treatment and the likelihood of recurrence after resection or biopsy. Further study may reveal crucial links between the pathogenesis of NMC and DTF and offer novel therapeutic strategies.
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Affiliation(s)
- Jonathan J Stone
- 1Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota
| | - Nikhil K Prasad
- 1Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota
| | - Pierre Laumonerie
- 1Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota
- 2Department of Orthopaedic Surgery, Hôpital Pierre Paul Riquet, Toulouse, France
| | - B Matthew Howe
- 3Department of Radiology, Mayo Clinic, Rochester, Minnesota; and
| | | | - Jodi M Carter
- 4Department of Laboratory Medicine & Pathology, Mayo Clinic, Rochester, Minnesota
| | - Mark E Jentoft
- 4Department of Laboratory Medicine & Pathology, Mayo Clinic, Rochester, Minnesota
| | - Robert J Spinner
- 1Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota
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14
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Attard V, Saifuddin A. Painful right elbow mass. Skeletal Radiol 2019; 48:831-832. [PMID: 30547195 DOI: 10.1007/s00256-018-3126-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Veronica Attard
- Radiology Department, Royal National Orthopaedic Hospital, Stanmore, UK.
| | - Asif Saifuddin
- Radiology Department, Royal National Orthopaedic Hospital, Stanmore, UK
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15
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Cabarrus MC, Yeh BM, Phelps AS, Ou JJ, Behr SC. From Inguinal Hernias to Spermatic Cord Lipomas: Pearls, Pitfalls, and Mimics of Abdominal and Pelvic Hernias. Radiographics 2017; 37:2063-2082. [DOI: 10.1148/rg.2017170070] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Miguel C. Cabarrus
- From the Department of Radiology and Biomedical Imaging, University of California, San Francisco, 505 Parnassus Ave, San Francisco, CA 94143-0628 (M.C.C., B.M.Y., A.S.P., S.C.B.); and Department of Radiology, Wake Forest University Baptist Medical Center, Winston-Salem, N.C. (J.J.O.)
| | - Benjamin M. Yeh
- From the Department of Radiology and Biomedical Imaging, University of California, San Francisco, 505 Parnassus Ave, San Francisco, CA 94143-0628 (M.C.C., B.M.Y., A.S.P., S.C.B.); and Department of Radiology, Wake Forest University Baptist Medical Center, Winston-Salem, N.C. (J.J.O.)
| | - Andrew S. Phelps
- From the Department of Radiology and Biomedical Imaging, University of California, San Francisco, 505 Parnassus Ave, San Francisco, CA 94143-0628 (M.C.C., B.M.Y., A.S.P., S.C.B.); and Department of Radiology, Wake Forest University Baptist Medical Center, Winston-Salem, N.C. (J.J.O.)
| | - Jao J. Ou
- From the Department of Radiology and Biomedical Imaging, University of California, San Francisco, 505 Parnassus Ave, San Francisco, CA 94143-0628 (M.C.C., B.M.Y., A.S.P., S.C.B.); and Department of Radiology, Wake Forest University Baptist Medical Center, Winston-Salem, N.C. (J.J.O.)
| | - Spencer C. Behr
- From the Department of Radiology and Biomedical Imaging, University of California, San Francisco, 505 Parnassus Ave, San Francisco, CA 94143-0628 (M.C.C., B.M.Y., A.S.P., S.C.B.); and Department of Radiology, Wake Forest University Baptist Medical Center, Winston-Salem, N.C. (J.J.O.)
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Chhabra A, Madhuranthakam AJ, Andreisek G. Magnetic resonance neurography: current perspectives and literature review. Eur Radiol 2017; 28:698-707. [PMID: 28710579 DOI: 10.1007/s00330-017-4976-8] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 05/14/2017] [Accepted: 06/29/2017] [Indexed: 12/19/2022]
Abstract
Magnetic resonance neurography (also called MRN or MR neurography) refers to MR imaging dedicated to the peripheral nerves. It is a technique that enhances selective multiplanar visualisation of the peripheral nerve and pathology by encompassing a combination of two-dimensional, three-dimensional and diffusion imaging pulse sequences. Referring physicians who seek imaging techniques that can depict and diagnose peripheral nerve pathologies superior to conventional MR imaging are driving the demand for MRN. This article reviews the pathophysiology of peripheral nerves in common practice scenarios, technical considerations of MRN, current indications of MRN, normal and abnormal neuromuscular appearances, and imaging pitfalls. Finally, the emerging utility of diffusion-weighted and diffusion tensor imaging is discussed and future directions are highlighted. KEY POINTS • Lesion relationship to neural architecture is more conspicuous on MRN than MRI. • 3D multiplanar imaging technique is essential for pre-surgical planning. • Nerve injuries can be classified on MRN using Sunderland's classification. • DTI provides quantitative information and insight into intraneural integrity and pathophysiology.
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Affiliation(s)
- Avneesh Chhabra
- Radiology and Orthopedic Surgery and Musculoskeletal Radiology, UT Southwestern Medical Center, Dallas, TX, USA.
- Adjunct Faculty, Johns Hopkins University, Baltimore, MD, USA.
| | - Ananth J Madhuranthakam
- Department of Radiology and Advanced Imaging Research Institute, UT Southwestern Medical Center, Dallas, TX, USA
| | - Gustav Andreisek
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Zürich, Switzerland
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Sciatic Nerve Involvement as an Unusual Presentation of Deep Endometriosis. JOURNAL OF ENDOMETRIOSIS AND PELVIC PAIN DISORDERS 2017. [DOI: 10.5301/jeppd.5000282] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Introduction Endometriosis affecting the sciatic nerve is extremely uncommon. Its main symptom is catamenial sciatica but it can result in neuropathy. The diagnosis is usually delayed for years. Our objective is to communicate our experience in the diagnosis, management and treatment of this pathology by presenting two patients. Methods Retrospective revision of medical charts of all sciatic endometriosis cases treated in the Endometriosis Unit of the University Hospital, La Paz, Spain. Results Two nulliparous patients 35 and 39 years old, with unilateral sciatica related to sciatic nerve endometriosis are presented. The lag time between the onset of symptoms and diagnosis was 8 and 5 years. Both patients had problems with locomotion and muscle atrophy, so laparoscopic neurolysis was performed with success in pain control but not total recovery of deambulation defect. Conclusions Directed anamnesis and magnetic resonance imaging (MRI) are good tools for diagnosis of endometriosis affecting sciatic nerve. In absence of neuropathy, hormonal pharmacotherapy can be used to control symptoms, but when it is present, surgical nerve decompression must not be delayed, and laparoscopic approach is feasible for trained surgeons. In our cases, neurolysis improved pain but complete recovery of motor function has not been reached. Physicians responsible for primary care need to be aware of the catamenial sciatica due to the nerve damage caused by endometriosis, even when it is very uncommon, because the consequences of the delay in assessment and treatment by a specialized multidisciplinary team in dedicated units may be irreversible.
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Weissman E, Boothe E, Wadhwa V, Scott K, Chhabra A. Magnetic Resonance Neurography of the Pelvic Nerves. Semin Ultrasound CT MR 2016; 38:269-278. [PMID: 28705371 DOI: 10.1053/j.sult.2016.11.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Chronic pelvic pain syndrome is commonly caused by nerve injury, inflammation, or entrapment. Owing to the complex anatomy and branching patterns of pelvic nerves, pelvic neuropathies are often difficult to illustrate and diagnose. High-resolution 3-T magnetic resonance neurography is a promising technique for the evaluation of peripheral neuropathy. In this article, the authors discuss the normal anatomy of major pelvic nerves, technical considerations of high-resolution imaging, and normal and abnormal imaging appearances with relevant case examples.
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Affiliation(s)
- Eric Weissman
- Department of Radiology, University of Texas Southwestern Medical Center, Dallas, TX
| | - Ethan Boothe
- Department of Radiology, University of Texas Southwestern Medical Center, Dallas, TX
| | - Vibhor Wadhwa
- Department of Radiology, University of Arkansas for Medical Sciences, Little Rock, AR
| | - Kelly Scott
- Department of Physical Medicine & Rehabilitation, University of Texas Southwestern Medical Center, Dallas, TX
| | - Avneesh Chhabra
- Department of Orthopaedic Surgery, University of Texas Southwestern Medical Center, Dallas, TX; Department of Orthopaedic Surgery, University of Texas Southwestern Medical Center, Dallas, TX.
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Wadhwa V, Scott KM, Rozen S, Starr AJ, Chhabra A. CT-guided Perineural Injections for Chronic Pelvic Pain. Radiographics 2016; 36:1408-25. [DOI: 10.1148/rg.2016150263] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Chhabra A, McKenna CA, Wadhwa V, Thawait GK, Carrino JA, Lees GP, Dellon AL. 3T magnetic resonance neurography of pudendal nerve with cadaveric dissection correlation. World J Radiol 2016; 8:700-706. [PMID: 27551340 PMCID: PMC4965354 DOI: 10.4329/wjr.v8.i7.700] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 03/25/2016] [Accepted: 05/11/2016] [Indexed: 02/07/2023] Open
Abstract
AIM: To evaluate the pudendal nerve segments that could be identified on magnetic resonance neurography (MRN) before and after surgical marking of different nerve segments.
METHODS: The hypothesis for this study was that pudendal nerve and its branches would be more easily seen after the surgical nerve marking. Institutional board approval was obtained. One male and one female cadaver pelvis were obtained from the anatomy board and were scanned using 3 Tesla MRI scanner using MR neurography sequences. All possible pudendal nerve branches were identified. The cadavers were then sent to the autopsy lab and were surgically dissected by a peripheral nerve surgeon and an anatomist to identify the pudendal nerve branches. Radiological markers were placed along the course of the pudendal nerve and its branches. The cadavers were then closed and rescanned using the same MRN protocol as the pre-marking scan. The remaining pudendal nerve branches were attempted to be identified using the radiological markers. All scans were read by an experienced musculoskeletal radiologist.
RESULTS: The pre-marking MR Neurography scans clearly showed the pudendal nerve at its exit from the lumbosacral plexus in the sciatic notch, at the level of the ischial spine and in the Alcock’s Canal in both cadavers. Additionally, the right hemorrhoidal branch could be identified in the male pelvis cadaver. The perineal and distal genital branches could not be identified. On post-marking scans, the markers were used as identifiable structures. The location of the perineal branch, the hemorroidal branch and the dorsal nerve to penis (in male cadaver)/clitoris (in female cadaver) could be seen. However, the visualization of these branches was suboptimal. The contralateral corresponding nerves were poorly seen despite marking on the surgical side. The nerve was best seen on axial T1W and T2W SPAIR images. The proximal segment could be seen well on 3D DW PSIF sequence. T2W SPACE was not very useful in visualization of this small nerve or its branches.
CONCLUSION: Proximal pudendal nerve is easily seen on MR neurography, however it is not possible to identify distal branches of the pudendal nerve even after surgical marking.
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Suntrup-Krueger S, Schilling M, Schwindt W, Wiendl H, Meuth SG. Case report of bilateral relapsing-remitting sciatic nerve palsy during two pregnancies. BMC Res Notes 2015; 8:654. [PMID: 26545719 PMCID: PMC4636768 DOI: 10.1186/s13104-015-1647-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Accepted: 10/28/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Unlike puerperal peripheral nerve lesions, mononeuropathy during pregnancy is rarely encountered. We report a case of bilateral relapsing-remitting sciatic nerve palsy during two pregnancies. An extensive literature search in PubMed brought no similar cases. CASE PRESENTATION A healthy young woman presented with initially unilateral sciatic nerve palsy, which manifested and worsened during the early phases of two successive pregnancies. Electrophysiology revealed axonal lesion of the sciatic nerve with predominant affection of the peroneal part. Extensive laboratory examination including cerebrospinal fluid examination was unremarkable. MR imaging was compatible with bilateral intraneural perineurioma. Recurrent occurrence during two pregnancies and an anamnestic relationship between intermediate worsening of the paresis and the menstrual cycle suggested hormone-dependency of the tumor. However, response to repeated intravenous immunoglobuline (IVIG) therapy during pregnancy and shortly after childbirth resulted in partial reversion of foot drop. This was also indicative of an immunoneuropathy. Nerve biopsy was not performed because of clinical improvement. The precise underlying neuropathological mechanism remained unclear. CONCLUSION To increase knowledge and awareness of this rare entity, potential etiologies of mononeuropathies during pregnancy are discussed in the context of this case report. In the rare occasion of peripheral nerve mononeuropathy during pregnancy, in which therapeutic opportunities are limited, IVIG therapy may be an option when the etiology cannot clearly be determined after thorough medical investigation.
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Affiliation(s)
- Sonja Suntrup-Krueger
- Department of Neurology, University Hospital Muenster, Albert-Schweitzer-Campus 1, Gebäude A1, 48149, Münster, Germany.
| | - Matthias Schilling
- Department of Neurology, University Hospital Muenster, Albert-Schweitzer-Campus 1, Gebäude A1, 48149, Münster, Germany.
| | - Wolfram Schwindt
- Department of Clinical Radiology, University Hospital Muenster, Albert-Schweitzer-Campus 1, Gebäude A1, 48149, Münster, Germany.
| | - Heinz Wiendl
- Department of Neurology, University Hospital Muenster, Albert-Schweitzer-Campus 1, Gebäude A1, 48149, Münster, Germany.
| | - Sven G Meuth
- Department of Neurology, University Hospital Muenster, Albert-Schweitzer-Campus 1, Gebäude A1, 48149, Münster, Germany.
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Siquara De Sousa AC, Capek S, Amrami KK, Spinner RJ. Neural involvement in endometriosis: Review of anatomic distribution and mechanisms. Clin Anat 2015; 28:1029-38. [DOI: 10.1002/ca.22617] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 07/28/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Ana C. Siquara De Sousa
- Department of Neurosurgery; Mayo Clinic; Rochester Minnesota
- Department of Anatomic Pathology; Gaffrée E Guinle University Hospital; Rio De Janeiro, Rio De Janeiro Brazil
| | - Stepan Capek
- Department of Neurosurgery; Mayo Clinic; Rochester Minnesota
- International Clinical Research Center; St. Anne's University Hospital Brno; Brno Czech Republic
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Siquara de Sousa AC, Capek S, Howe BM, Jentoft ME, Amrami KK, Spinner RJ. Magnetic resonance imaging evidence for perineural spread of endometriosis to the lumbosacral plexus: report of 2 cases. Neurosurg Focus 2015; 39:E15. [DOI: 10.3171/2015.6.focus15208] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Sciatic nerve endometriosis (EM) is a rare presentation of retroperitoneal EM. The authors present 2 cases of catamenial sciatica diagnosed as sciatic nerve EM. They propose that both cases can be explained by perineural spread of EM from the uterus to the sacral plexus along the pelvic autonomie nerves and then further distally to the sciatic nerve or proximally to the spinal nerves. This explanation is supported by MRI evidence in both cases. As a proof of concept, the authors retrieved and analyzed the original MRI studies of a case reported in the literature and found a similar pattern of spread. They believe that the imaging evidence of their institutional cases together with the outside case is a very compelling indication for perineural spread as a mechanism of EM of the nerve.
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Affiliation(s)
| | - Stepan Capek
- Departments of 1Neurosurgery,
- 5International Clinical Research Center, St. Anne’s University Hospital Brno, Czech Republic
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Tumefactive appearance of peripheral nerve involvement in hematologic malignancies: a new imaging association. Skeletal Radiol 2015; 44:1001-9. [PMID: 25920386 DOI: 10.1007/s00256-015-2151-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Revised: 03/02/2015] [Accepted: 04/09/2015] [Indexed: 02/02/2023]
Abstract
OBJECTIVE In neurolymphomatosis (NL), the affected nerves are typically described to be enlarged and hyperintense on T2W MR sequences and to avidly enhance on gadolinium-enhanced T1WI. This pattern is highly non-specific. We recently became aware of a "tumefactive pattern" of NL, neuroleukemiosis (NLK) and neuroplasmacytoma (NPLC), which we believe is exclusive to hematologic diseases affecting peripheral nerves. MATERIALS AND METHODS We defined a "tumefactive" appearance as complex, fusiform, hyperintense on T2WI, circumferential tumor masses encasing the involved peripheral nerves. The nerves appear to be infiltrated by the tumor. Both structures show varying levels of homogenous enhancement. We reviewed our series of 52 cases of NL in search of this pattern; two extra outside cases of NL, three cases of NLK, and one case of NPLC were added to the series. RESULTS We identified 20 tumefactive lesions in 18 patients (14 NL, three NLK, one NPLC). The brachial plexus (n = 7) was most commonly affected, followed by the sciatic nerve (n = 6) and lumbosacral plexus (n = 3). Four patients had involvement of other nerves. All were proven by biopsy: the diagnosis was high-grade lymphoma (n = 12), low-grade lymphoma (n = 3), acute leukemia (n = 2), and plasmacytoma (n = 1). CONCLUSIONS We present a new imaging pattern of "tumefactive" neurolymphomatosis, neuroleukemiosis, or neuroplasmacytoma in a series of 18 cases. We believe this pattern is associated with hematologic diseases directly involving the peripheral nerves. Knowledge of this association can provide a clue to clinicians in establishing the correct diagnosis. Bearing in mind that tumefactive NL, NLK, and NPLC is a newly introduced imaging pattern, we still recommend to biopsy patients with suspicion of a malignancy.
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Spectrum of suprascapular nerve lesions: normal and abnormal neuromuscular imaging appearances on 3-T MR neurography. AJR Am J Roentgenol 2015; 204:589-601. [PMID: 25714290 DOI: 10.2214/ajr.14.12974] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
OBJECTIVE. In this article, we will review the normal anatomy and imaging features of various neuromuscular abnormalities related to suprascapular neuropathy. CONCLUSION. Suprascapular neuropathy can be difficult to distinguish from rotator cuff pathology, plexopathy, and radiculopathy. Electrodiagnostic studies are considered the reference standard for diagnosis; however, high-resolution 3-T MR neurography (MRN) can play an important role. MRN enables direct visualization of the nerve and simultaneous assessment of the cervical spine, brachial plexus, and rotator cuff.
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MRI investigation of radiating pain in the lower limbs: value of an additional sequence dedicated to the lumbosacral plexus and pelvic girdle. AJR Am J Roentgenol 2015; 203:1280-5. [PMID: 25415706 DOI: 10.2214/ajr.13.11884] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVE In some cases, sciatica-like symptoms radiating through the buttock, anterior thigh, or leg result from spinal root compression in an extraspinal location or from injury to the pelvic girdle. It has been suggested that adding a coronal STIR sequence dedicated to the lumbosacral plexus and pelvis to the routine MRI protocol can provide a good depiction of disorders of this type. MATERIALS AND METHODS Two hundred nine patients with sciatica-like symptoms of suspected lumbar origin were included in the study. Disorders responsible for symptoms involving extraspinal compression of the lumbosacral plexus or pelvic girdle were retrospectively noted and correlated with age, sex, location of pain, referring physician, presence of discoradicular impingement liable to explain symptoms, and history of neoplasia. RESULTS An extraspinal cause of symptoms was depicted in 12 cases (5.7%), including three cases of extraspinal compression and nine differential diagnoses in the pelvic region. Prevalence of an extraspinal cause of pain was significantly correlated with the absence of discoradicular impingement in the spine (p=0.046). A higher prevalence of extraspinal compression of the lumbosacral plexus (p=0.029) was seen in patients 60 years old or older, whereas no other feature was statistically associated with an extraspinal cause of pain. CONCLUSION Because of its short acquisition time and subsequent low cost, the additional coronal STIR sequence should be performed in the routine MRI investigation of sciatica-like symptoms when no discoradicular impingement is seen in the spine to depict an extraspinal cause of symptoms.
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Wadhwa V, Salaria SN, Chhabra A. Granular cell tumor of the ulnar nerve: MR neurography characterization. J Radiol Case Rep 2014; 8:11-7. [PMID: 25426230 DOI: 10.3941/jrcr.v8i6.1664] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The authors report an unusual case of ulnar neuropathy caused by granular cell tumor. The report describes the anatomic 3 Tesla MR Neurography and functional diffusion tensor findings of the case, which was subsequently confirmed on surgical excision and histopathology.
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Affiliation(s)
- Vibhor Wadhwa
- The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Safia N Salaria
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Avneesh Chhabra
- The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, USA ; Radiology, UT Southwestern Medical Center, Dallas, Tx, USA
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Nishio J, Iwasaki H, Hayashi H, Nabeshima K, Naito M. Soft tissue perineurioma of the foot with 10q24 rearrangements: unique MRI features with histopathologic correlation. Skeletal Radiol 2014; 43:1017-22. [PMID: 24562506 DOI: 10.1007/s00256-014-1839-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Revised: 01/26/2014] [Accepted: 01/28/2014] [Indexed: 02/02/2023]
Abstract
Perineurioma is an uncommon benign peripheral nerve sheath tumor with advanced perineurial differentiation. Two distinct subtypes are recognized: intraneural and soft tissue. We herein present a unique case of soft tissue perineurioma in the right foot of a 43-year-old man. Radiographs showed a non-specific soft tissue mass. On computed tomography scan, the mass was iso- to slightly hypodense relative to muscle. On T1- and T2-weighted images, the mass exhibited iso- to slightly low signal intensity relative to muscle with foci of high signal intensity. Slight contrast enhancement was noted on enhanced T1-weighted images with fat suppression. A marginal excision of the tumor was performed and histopathologic examination confirmed the diagnosis of soft tissue perineurioma. The clinicopathologic, radiologic, and cytogenetic findings are described, and the relevant literature is reviewed.
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Affiliation(s)
- Jun Nishio
- Department of Orthopaedic Surgery, Faculty of Medicine, Fukuoka University, 7-45-1 Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan,
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Bucknor MD, Steinbach LS, Saloner D, Chin CT. Magnetic resonance neurography evaluation of chronic extraspinal sciatica after remote proximal hamstring injury: a preliminary retrospective analysis. J Neurosurg 2014; 121:408-14. [PMID: 24878283 DOI: 10.3171/2014.4.jns13940] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECT Extraspinal sciatica can present unique challenges in clinical diagnosis and management. In this study, the authors evaluated qualitative and quantitative patterns of sciatica-related pathology at the ischial tuberosity on MR neurography (MRN) studies performed for chronic extraspinal sciatica. METHODS Lumbosacral MRN studies obtained in 14 patients at the University of California, San Francisco between 2007 and 2011 were retrospectively reviewed. The patients had been referred by neurosurgeons or neurologists for chronic unilateral sciatica (≥ 3 months), and the MRN reports described asymmetrical increased T2 signal within the sciatic nerve at the level of the ischial tuberosity. MRN studies were also performed prospectively in 6 healthy volunteers. Sciatic nerve T2 signal intensity (SI) and cross-sectional area at the ischial tuberosity were calculated and compared between the 2 sides in all 20 subjects. The same measurements were also performed at the sciatic notch as an internal reference. Adjacent musculoskeletal pathology was compared between the 2 sides in all subjects. RESULTS Seven of the 9 patients for whom detailed histories were available had a specific history of injury or trauma near the proximal hamstring preceding the onset of sciatica. Eight of the 14 patients also demonstrated soft-tissue abnormalities adjacent to the proximal hamstring origin. The remaining 6 had normal muscles, tendons, and marrow in the region of the ischial tuberosity. There was a significant difference in sciatic nerve SI and size between the symptomatic and asymptomatic sides at the level of the ischial tuberosity, with a mean adjusted SI of 1.38 compared with 1.00 (p < 0.001) and a mean cross-sectional nerve area of 0.66 versus 0.54 cm(2) (p = 0.002). The control group demonstrated symmetrical adjusted SI and sciatic nerve size. CONCLUSIONS This study suggests that chronic sciatic neuropathy can be seen at the ischial tuberosity in the setting of prior proximal hamstring tendon injury or adjacent soft-tissue abnormalities. Because hamstring tendon injury as a cause of chronic sciatica remains a diagnosis of exclusion, this distinct category of patients has not been described in the radiographic literature and merits special attention from clinicians and radiologists in the management of extraspinal sciatica. Magnetic resonance neurography is useful for evaluating chronic sciatic neuropathy both qualitatively and quantitatively, particularly in patients for whom electromyography and traditional MRI studies are unrevealing.
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Affiliation(s)
- Matthew D Bucknor
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, California
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Wadhwa V, Lee PP, Strome GM, Suh KJ, Carrino JA, Chhabra A. Spectrum of superficial nerve-related tumor and tumor-like lesions: MRI features. Acta Radiol 2014; 55:345-58. [PMID: 23904089 DOI: 10.1177/0284185113494983] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Superficial soft-tissue masses arising from skin appendages, metastasis, and inflammatory lesions have been widely reported. However, nerve-related superficial mass-like lesions other than peripheral nerve sheath tumors are less commonly described. High resolution magnetic resonance imaging (MRI) is an excellent non-invasive tool for the evaluation of such lesions. In this article, the authors discuss the entire spectrum of these lesions and also outline a systemic diagnostic approach.
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Affiliation(s)
- Vibhor Wadhwa
- The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Pearlene P Lee
- The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | | | - Kyung Jin Suh
- Dongguk University Gyungju Hospital College of Medicine, Dongguk University, Gyungju-Si, Republic of Korea
| | - John A Carrino
- The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Avneesh Chhabra
- The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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Intraneural perineurioma of the sciatic nerve: an under-recognized nerve neoplasm with characteristic MRI findings. Skeletal Radiol 2014; 43:375-9. [PMID: 24061494 DOI: 10.1007/s00256-013-1733-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 08/29/2013] [Accepted: 08/30/2013] [Indexed: 02/02/2023]
Abstract
Intraneural perineurioma is a benign peripheral nerve neoplasm that typically affects teenagers and young adults and tends to result in a motor-predominant neuropathy. The lesion is rare, but has likely been underdiagnosed due to a lack of familiarity among both clinicians and radiologists. There have been few reports in the radiology literature despite the lesion having a fairly characteristic imaging appearance. We report a case of a 26-year-old woman with an intraneural perineurioma of the left sciatic nerve confirmed with excisional biopsy and pathologic analysis.
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Ahlawat S, Chhabra A, Blakely J. Magnetic Resonance Neurography of Peripheral Nerve Tumors and Tumorlike Conditions. Neuroimaging Clin N Am 2014; 24:171-92. [DOI: 10.1016/j.nic.2013.03.035] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Fritz J, Chhabra A, Wang KC, Carrino JA. Magnetic resonance neurography-guided nerve blocks for the diagnosis and treatment of chronic pelvic pain syndrome. Neuroimaging Clin N Am 2013; 24:211-34. [PMID: 24210321 DOI: 10.1016/j.nic.2013.03.028] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Magnetic resonance (MR) neurography - guided nerve blocks and injections describe a techniques for selective percutaneous drug delivery, in which limited MR neurography and interventional MR imaging are used jointly to map and target specific pelvic nerves or muscles, navigate needles to the target, visualize the injected drug and detect spread to confounding structures. The procedures described, specifically include nerve blocks of the obturator nerve, lateral femoral cutaneous nerve, pudendal nerve, posterior femoral cutaneous nerve, sciatic nerve, ganglion impar, sacral spinal nerve, and injection into the piriformis muscle.
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Affiliation(s)
- Jan Fritz
- Musculoskeletal Radiology, The Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins Hospital, 600 N Wolfe Street, Baltimore, MD 21287, USA.
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Chhabra A. Magnetic Resonance Neurography—Simple Guide to Performance and Interpretation. Semin Roentgenol 2013; 48:111-25. [DOI: 10.1053/j.ro.2012.11.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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