MRI of Dumbbell-Shaped Spinal Tumors

Isoda, Haruo; Takahashi, Mitsuru; Mochizuki, Toshiaki; Ramsey, Ruth G.; Masui, Takayuki; Takehara, Yasuo; Kaneko, Masao; Ito, Tatsuhiko; Miyazaki, Y; Kawai, Hiroaki

doi:10.1097/00004728-199607000-00014

Cited by 22 publications

(18 citation statements)

References 16 publications

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“…This probably resulted because schwannomas, the most common type of dumbbell tumor, are frequently derived from the upper cervical nerve roots and less frequently from the thoracic nerve roots. 4 This result was not consistent with previous reports, 6,7 in which the dumbbell tumor was most common in the thoracic spine.…”

Section: Discussioncontrasting

confidence: 87%

Spinal dumbbell tumors: an analysis of a series of 118 cases

Ozawa¹,

Kokubun²,

Aizawa³

et al. 2007

SPI

205

103

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Object The authors analyzed a series of 118 cases of spinal dumbbell tumors to elucidate the feature of the tumors. Methods Of 674 cases of spinal cord tumors, the incidence of dumbbell tumors was studied. The tumors were analyzed, and the authors focus on the distribution of age and sex, the pathological diagnoses, their locations, Eden classification, and the surgical methods used. Results The incidence of dumbbell tumors was 18%. The mean patient age was 43 years, which was younger than that for all spinal cord tumors (mean 50 years). There were 11 patients younger than 10 years of age. The rate of dumbbell tumors in the cervical spine was significantly higher than that of all spinal cord tumors. Fifteen (18%) of the 81 schwannomas were observed in the C-2 nerve root, thus having a higher incidence than those in the other nerve roots. In 99 cases (84%), the tumors were removed through a hemilaminectomy with or without a facetectomy and posterior fusion. Of 118 cases, 69% of the tumors were schwannomas, and malignant tumors were found in 10 cases (8.5%). Seven (64%) of 11 patients younger than 10 years of age had malignant tumors. Three patients older than 10 years of age had malignant tumors, thus accounting for 2.8% of the 107 older patients. Conclusions The incidence of dumbbell tumors was 18%, and they are not uncommon. Malignant dumbbell tumors were more common in children younger than 10 years of age than in older patients.

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Section: Discussioncontrasting

confidence: 87%

Spinal dumbbell tumors: an analysis of a series of 118 cases

Ozawa¹,

Kokubun²,

Aizawa³

et al. 2007

SPI

205

103

View full text Add to dashboard Cite

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“…Dumbbell-shaped spinal tumors are usually thought to be schwannomas, neurofibromas or meningiomas. [ 10 ] Most of these tumors have enlarged intervertebral foramina, whereas cavernous angiomas do not tend to be dilated. [ 10 12 ] [ Table 1 ].…”

Section: Discussionmentioning

confidence: 99%

A case of dumbbell-shaped epidural cavernous angioma in the lumbar spine

Yunoki¹,

Suzuki²,

Uneda³

et al. 2015

Surg Neurol Int

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Background:Most spinal cavernous haemangiomas occur in the vertebral body and purely extradural cavernous hemangiomas without any vertebral body involvement is rare and account for only 4% of all extradural spinal tumors. Dumbbell-shaped spinal cavernous angioma is extremely rare, only 10 cases have been reported in the literature.Case Description:A 77-year-old female presented with a one-year history of lumbago and right-sided L3 dermatomal hypoesthesia. A dumbbell mass at the L2/3 vertebral level was identified on lumbar MRI. The lesion was irregularly shaped and isointense on T1W and hyperintense on T2W and DWI images with homogenous contrast enhancement. A presumptive diagnosis was schwannoma, but other malignant neoplasms were also considered because of its irregular shape, minimally dilated neural foramen and the involvement of the non-enhanced L3 nerve root. The patient underwent surgery with a lateral extracavitary approach. A histopathological examination revealed cavernous hemangioma.Conclusion:Cavernous hemangioma should be included in the differential diagnosis of dumbbell-shaped spinal tumors when the intervertebral foramina is not highly dilated and non-enhanced nerve root is identified in the tumor.

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“…The two reasons to perform the surgery from ''outer to inner'' are: (i) excising the tumor from ''inner to outer'' would cause more blood to spill into the subarachnoid space; and (ii) more than half of all dumbbell tumors are completely restricted to the extradural space, which may not be appreciated on a preoperative MRI. 14,18,19 Spinal meningiomas represent 25% to 45% of intradural tumors of the spine. 20 Typically, they are located in the intradural extramedullary space.…”

Section: Surgical Techniquesmentioning

confidence: 99%