Sonographic appearances of nerve tumors

Beggs, Ian

doi:10.1002/(sici)1097-0096(199909)27:7<363::aid-jcu1>3.0.co;2-7

Cited by 121 publications

(75 citation statements)

References 22 publications

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“…Hypervascularity on CDUS has been reported in schwannomas but not in neurofibromas, 4,6,14 although Beggs 5 reported that both tumors presented with hypervascularity on CDUS. In our study, CDUS revealed hypervascularity in all of the schwannomas and neurofibromas without a significant difference.…”

Section: Discussionmentioning

confidence: 99%

Differentiation Between Schwannomas and Neurofibromas in the Extremities and Superficial Body

Tsai

Chiou

Chou

et al. 2008

Journal of Ultrasound in Medicine

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Abbreviations CDUS, color Doppler ultrasonography; MRI, magnetic resonance imaging; PSV, peak systolic velocity; RI, resistive index enign peripheral nerve sheath tumors are divided into 2 major groups: schwannomas (neurilemomas) and neurofibromas.1 Differentiation of schwannomas from neurofibromas is of relevance to surgeons because schwannomas can be easily shelled out while preserving nerve contiguity. In most neurofibromas, however, the nerve is incorporated within the mass, and the required surgery includes resection and subsequent nerve grafting to preserve and restore function. B ArticleArticle includes CME test CME CME Objective. The purpose of this study was to verify whether high-resolution and color Doppler ultrasonography could distinguish schwannomas from neurofibromas. Methods. Seventy-six tumors in 71 patients were included in this study. There were 46 patients (50 tumors) with schwannomas and 25 patients (26 tumors) with nondiffuse neurofibromas in the extremities or superficial parts of the body. Ultrasonographic examinations were performed in all patients. The tumor size, shape, location, internal echogenicity, posterior acoustic phenomenon (eg, shadowing or enhancement), capsule, relationship with the adjacent nerve, and presence of cystic components were documented. Color Doppler studies (75 lesions) and spectral Doppler studies (44 lesions) were performed. All data were analyzed with statistical software to check the significance. Results. Both tumors presented as well-defined hypoechoic nodules on ultrasonography. They were oval or lobulated, showed posterior acoustic enhancement, and were hypervascular on color Doppler ultrasonography. There was no significant difference with respect to ultrasonographic morphologic characteristics. The rates of centric, eccentric, and undetermined associations with nerves were 40%, 20%, and 40% in the schwannomas and 46.2%, 0%, and 53.8% in the neurofibromas, respectively, showing a significant difference (P = .032). There was no significant difference in the chance of cystic changes between the schwannomas (30%) and neurofibromas (23%). Conclusions. No ultrasonographic finding (gray scale, color Doppler, or spectral analysis) allows differentiation between neurofibromas and schwannomas of the extremities. A nerve eccentrically entering a mass was seen only in schwannomas, and that may allow differentiation between neurofibromas and schwannomas.

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Section: Discussionmentioning

confidence: 99%

Differentiation Between Schwannomas and Neurofibromas in the Extremities and Superficial Body

Tsai

Chiou

Chou

et al. 2008

Journal of Ultrasound in Medicine

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“…5 Doppler evaluation may help distinguish a nerve tumor from a thrombosed aneurysm or from an enlarged lymph node. 6 Sonograms of schwannoma typically show a well-defined, ovoid or round, hypoechoic, generally homogeneous solid mass with a moderate to marked posterior acoustic enhancement and eccentric positioning of the nerve trunk relative to the schwannoma. 5,7 The homogeneous and decreased echogenicity of schwannomas may be explained by the uniform cellular pattern, allowing a moderate to marked sound-through transmission.…”

Section: Discussionmentioning

confidence: 99%

Sonographic diagnosis of a cervical vagal schwannoma

Corroller

Sébag

Vidal

et al. 2008

J of Clinical Ultrasound

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“…No neurofibroma was identified as there might not have been any within the sheath or it/they might have been unnoticed because of their hypoechoic nodular sonographic appearances, which is exactly as the brachial plexus trunks/divisions at this level. [8][9][10][11][12] Beggs [9] described neurofibromas as well-defined solid hypoechoic masses that have faint distal acoustic enhancement. Reynolds et al [13] also reported that these tumors are often hypoechoic, with posterior acoustic enhancement.…”

Section: Discussionmentioning

confidence: 51%

Use of ultrasound-guided supraclavicular brachial plexus block as an anaesthetic technique in a patient with neurofibromatosis type 1: a case report

Şalvız

Bingül

Karadeniz

et al. 2017

Agri

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ÖzetNörofibromatozis tip 1 kütanöz ve/veya pleksiform nörofibromlarla ve hiperpigmente 'café-au-lait' lekeleriyle karakterize otozomal dominant bir hastalıktır. Endokrin ve visseral organları tutmakta, ve potansiyel havayolu problemleri (ventilasyon/ entübasyon), anormal spinal anatomi ve periferik nörofibromlar gibi çok sayıda zorlukla ilişkili olabilmektedir. Bu sebeplerle komplikasyonlardan kaçınmak, morbidite ve mortaliteyi düşürmek için anestezi yönteminin seçimi daha da önem kazanmaktadır. Biz, bu olgu sunumu ile kol ve önkol cerrahisi geçirecek olan nörofibromatozis tip 1 tanılı hastada ultrason kullanımının ve başarılı supraklavikuler brakial pleksus blok uygulamasının yararlılığını ifade etmeye çalıştık.Anahtar sözcükler: Nörofibromatozis tip I; supraklavikuler brakial pleksus blok; ultrason. SummaryNeurofibromatosis type 1 is an autosomal dominant condition characterized by cutaneous and/or plexiform neurofibromas and hyperpigmented café-au-lait spots. It affects multiple endocrine and visceral organs and can be associated with several difficulties such as potential airway (ventilation/intubation) problems, abnormal spinal anatomy, and peripheral neurofibromas. Therefore, anesthesia technique selection becomes more of an issue in terms of avoiding complications and decreasing morbidity and mortality. In the present case, we describe the use of ultrasound and the successful performance of supraclavicular brachial plexus block for surgery on the arm and forearm in a patient with neurofibromatosis type 1.

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Sonographic appearances of nerve tumors

Cited by 121 publications

References 22 publications

Differentiation Between Schwannomas and Neurofibromas in the Extremities and Superficial Body

Differentiation Between Schwannomas and Neurofibromas in the Extremities and Superficial Body

Sonographic diagnosis of a cervical vagal schwannoma

Use of ultrasound-guided supraclavicular brachial plexus block as an anaesthetic technique in a patient with neurofibromatosis type 1: a case report

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