|Year : 2020 | Volume
| Issue : 1 | Page : 28-33
Vertebral hemangiomas: A report of two unusual cases and a review of literature
Suresh S Pillai1, M Harisankar2
1 Department of Spine Surgery, Baby Memorial Hospital, Kozhikode, Kerala, India
2 Department of Orthopedics, Baby Memorial Hospital, Kozhikode, Kerala, India
|Date of Submission||22-Oct-2020|
|Date of Decision||10-Nov-2020|
|Date of Acceptance||27-Oct-2020|
|Date of Web Publication||17-Nov-2020|
Sarika, Perunnai West PO, Changanacherry 2, Kottayam - 686 102, Kerala
Source of Support: None, Conflict of Interest: None
Vertebral hemangiomas are among the most common benign lesions of the spine, with an incidence of 10%–12% in the adult population. Vertebral hemangiomas have been reported in all age groups with most prevalence in the fifth decade of life. A small proportion of the lesions (1%) may cause neurological symptoms ranging from pain to full-fledged paraplegia. Since most of the vertebral hemangiomas are asymptomatic and quiescent, no treatment is required. Treatment is to be considered only if there is back pain or neurological symptoms due to vertebral fracture or spinal cord/root compression. Because these active and symptomatic types of vertebral hemangiomas are a rare occurrence, their treatment modalities remain controversial and hence problematic. Since most of the patients are treated by a combination of modalities, the analysis of the efficacy of each treatment is difficult to assess and hence the apt choice of treatment is still controversial.
Keywords: Hemangioma, spine tumor, treatment of hemangioma
|How to cite this article:|
Pillai SS, Harisankar M. Vertebral hemangiomas: A report of two unusual cases and a review of literature. J Orthop Assoc South Indian States 2020;17:28-33
|How to cite this URL:|
Pillai SS, Harisankar M. Vertebral hemangiomas: A report of two unusual cases and a review of literature. J Orthop Assoc South Indian States [serial online] 2020 [cited 2020 Nov 25];17:28-33. Available from: https://www.joasis.org/text.asp?2020/17/1/28/300761
| Introduction|| |
Vertebral hemangiomas are among the most common benign lesions of the spine, with an incidence of 10%–12% in the adult population., They are usually described as dysplasias or vascular malformations affecting the vertebral column and are attributed to dysembryogenetic disturbances affecting the proper differentiation of blood vessels., Majority of the vertebral hemangiomas are quiescent and asymptomatic. A small proportion of the lesions (1%) may cause neurological symptoms ranging from pain to full-fledged paraplegia. Because these active and symptomatic types of vertebral hemangiomas are a rare occurrence, their treatment modalities remain controversial and hence problematic. The main objective of this article is to summarize the natural history, radiological findings, pathology, and treatment options of vertebral hemangiomas.
| Case Reports|| |
A 36-year-old female with a history of low back pain was initially treated by ayurvedic massage. Following the massage, she developed weakness of both lower limbs which soon progressed to dense paraplegia. She was taken to a hospital nearby. On magnetic resonance imaging (MRI) evaluation, she was diagnosed to have an aggressive hemangioma of D12 and L1 causing cord compression [Figure 1]a and [Figure 1]b. She was prepared for decompression and stabilization. However, intraoperatively, she developed torrential and uncontrollable bleeding causing hypotension. The wound was packed since the bleeding could not be controlled and was referred to our institution. On arrival, the patient was managed with blood transfusion and fluids. An interventional radiology consultation and embolization of the feeding vessels to the tumor was done [Figure 2]. After the embolization, we could attain hemostasis, successful decompression of the cord, and posterior stabilization of the spine [Figure 3]. She was not given any postoperative radiotherapy. The patient had a gradual full motor and sensory recovery by the end of 6 months. She has been on follow-up for the past 15 years and is doing well without any further incidents.
|Figure 1: (a and b) Magnetic resonance imaging showing hemangioma of D12 and L1 causing cord compression|
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|Figure 3: Intraoperative picture showing decompressed cord and posterior stabilization|
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A 40-year-old male presented to the outpatient department (OPD) with back pain and gait disturbances. On detailed MRI evaluation, he was diagnosed to have a hemangioma of D12 vertebra causing cord compression [Figure 4]a, [Figure 4]b, [Figure 4]c. He was subjected to preoperative angioembolization of the feeding vessels of the lesion [Figure 5], and after 24 h, he was treated with a 360° surgery with decompression, corpectomy of D12 vertebra, and iliac crest strut graft placement through the anterior approach [Figure 6] and posterior stabilization through the posterior approach [Figure 7] and [Figure 8]a and [Figure 8]b. The tissue was sent for histopathological evaluation which revealed hemangiomatous tissue along with the presence of an increased number of plasma cells. The patient recovered his functions within 3 months of the surgery and returned to his routine activities by the end of 6 months.
|Figure 4: (a-c) Magnetic resonance imaging showing a hemangioma of D12 vertebra causing cord compression|
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|Figure 5: Preoperative angioembolization of the feeding vessels of the lesion|
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|Figure 6: Intraoperative picture showing corpectomy and anterior decompression|
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After 7 years, the patient presented again with back pain, and now, the MRI evaluation showed the D9 and D10 vertebral bodies affected with a lytic lesion. A biopsy taken from the tumor revealed it to be multiple myeloma. The patient was referred to the oncology department for further medical management of the tumor. One year later, the patient presented to the OPD with back pain and a clicking sensation at the surgical site. Radiographic evaluation revealed a broken rod. He was treated with a replacement of the broken rod. After another year, he came to visit again with a similar clicking sensation and pain, and it was found that the rod on the opposite side was broken. He was treated with the replacement of the rod. He is continuing his medical oncological treatment and follow-up. He has been on follow-up for the past 2 years and with no new symptoms.
| Discussion|| |
Vertebral hemangiomas have been reported in all age groups with most prevalence in the fifth decade of life. This lesion has a female preponderance, with a male: female ratio of 1:1.5.,, The most common location is the thoracic spine, though occurrences have been noted in the cervical as well as lumbar spine. Mostly, they involve the vertebral body but rarely may involve the posterior arch as well.,
Usually, the vertebral hemangiomas are asymptomatic and are incidental findings, but rarely, the lesions can be active and cause compression of the spinal cord and cause neurological symptoms. These varieties are called compressive hemangiomas. The symptoms range from back pain, radiculopathies to myelopathy and even paraplegia. The compression can be due to bone expansion, expansion of the lesion into the spinal canal, vascular occlusion of the spinal cord, epidural hemorrhage, or even mechanical compression due to the collapse of the affected vertebra., The most common location of the compressive type of vertebral hemangioma is the thoracic spine and is mostly found in younger individuals.
Vertebral hemangioma and pregnancy
Women with vertebral hemangiomas usually become symptomatic in the third trimester of pregnancy owing to the increased intra-abdominal pressure leading to increased blood flow within the vertebral venous system or due to relatively sparse vascular supply of the thoracic spinal cord., In addition, the endothelial growth-promoting effect of the elevated estrogen levels results in the increased size of the hemangioma during pregnancy.
Characteristically, these are benign tumors composed of abnormal blood vessels that may be capillary sized or cavernous in nature. Cavernous type is the most common, with large sinusoidal spaces covered with a single layer of epithelium. Macroscopically, the tissue is soft in consistency, well demarcated, and often dark red in color. The bony trabeculae of the involved vertebral body are thickened and sclerotic imparting it a honeycomb-like appearance. Fibrous/adipose involution of bone marrow is also observed frequently.,
Based on radiological features, vertebral hemangiomas can be classified as typical, atypical, and aggressive. The classification into typical and atypical is based on the ratio of fatty to vascular components in the tissue and interstitial edema which becomes apparent on MRI evaluation. The aggressive group is identified by the extension of the lesion beyond the vertebral body, destruction of the vertebral cortex, and the invasion of epidural and paravertebral spaces.,,
The lesions with a high fatty content are usually benign or quiescent, whereas lesions with a higher vascular content have the chance to evolve into an atypical variant and may even become aggressive and cause compressive symptoms.
Paravertebral soft-tissue involvement that is seen in conjunction with vertebral hemangiomas may represent hematoma or extravertebral tumor extension. This can be seen anterior or posterior to the vertebral body.,,
Typical vertebral hemangiomas
The characteristic radiographic features include reduced bone density between much denser and sclerotic vertebral trabeculae in a nonexpanded vertebral body. This gives the vertebral hemangiomas a typical honeycombed or jail-bar appearance commonly referred to as the corduroy pattern. This vertical jail-bar pattern is typically seen in a lateral view due to the resorption of the horizontal trabeculae and consequent reinforcement of the vertical trabeculae., It should be noted that at least one-third of the vertebral body should be involved for the radiographic signs to be apparent. The disc spaces are usually intact.
Computed tomography (CT) imaging shows the typical polka-dot sign which is pathognomonic for vertebral hemangioma. MRI shows a characteristic appearance due to the serpentine vascular channels in the hemangiomatous lesion. The higher fat content in the lesion makes it hyperintense in T1-weighted images, and the higher vascular content makes it hyperintense in the fluid-sensitive T2-weighted images.
Atypical vertebral hemangiomas
Atypical vertebral hemangiomas have a higher vascular to fatty content ratio compared to the typical vertebral hemangiomas. Hence, in MRI, the lesion might appear hypointense in T1-weighted images. However, the lesion will be hyperintense in the T2-weighted images due to the higher vascular content.
Aggressive vertebral hemangiomas
These are different from the usual vertebral hemangiomatous lesions in that the characteristic radiographic findings may be absent. The nonspecific findings that are commonly seen with such lesions are expanded cortex, osteoporosis, collapse of the vertebral body, erosion of the pedicles, and the presence of lytic areas.,,
Laredo et al. proposed radiographic criteria for the identification of aggressive vertebral hemangiomas. They described six radiographic and CT features and proposed that if more than three are present along with radicular pain, that indicates that the lesion is of the aggressive variety. The features that were described were as follows:
- Involvement of the entire vertebral body
- Extension into the neural arch
- Cortical expansion
- Thoracic location (T3–T9)
- Irregular honeycomb pattern
- Soft-tissue mass.
Other radiographic features that may point toward an aggressive lesion are a maintained vertebral body height, a sharp margin with normal marrow, intact cortex adjacent to a paraspinal mass, and enlarged paraspinal vessels. Before the treatment of aggressive vertebral hemangiomas, an angiography of the lesion to identify the feeding/draining vessels is recommended. The feeding vessels are usually a branch of a lumbar or intercostal artery that arises proximal to the radicular branches. The typical angiography findings include dilatation of the arterioles, numerous blood pools in the capillary phase, and intense opacification extending beyond the normal hemivertebral territory throughout the entire vertebral body.
Conditions such as focal fatty replacement, Modic type II changes, and prior radiation therapy lead to lesions that look like typical hemangiomas on radiographic evaluation. The MRI findings of atypical vertebral hemangiomas are similar to those of metastatic disease and even plasmacytoma. The lesions that share a similar radiographic picture with an aggressive variety of vertebral hemangiomas include solitary bone plasmacytoma, chordoma, lymphoma, and epithelioid hemangioendothelioma., Aggressive vertebral hemangiomas present a diagnostic challenge to the radiologist since there is no radiologic finding characteristic to it. Vertebral hemangiomas may coexist with other lesions, further making the diagnosis difficult. In such cases, angiography becomes an essential and useful diagnostic tool. A biopsy may be necessary if the diagnosis is not confirmed with imaging alone.
Another differential is cystic angiomatosis of bone which is associated with widespread cystic bone destruction, visceral angiomas, and generally a poor prognosis.,
Plasmacytomas and hemangiomas are common findings in patients, but a coexisting hemangioma and plasmacytoma in a single vertebra is an extremely rare scenario with only two such cases reported previously in the literature.
Since most of the vertebral hemangiomas are asymptomatic and quiescent, no treatment is required. Treatment is to be considered only if there is back pain or neurological symptoms due to vertebral fracture or spinal cord/root compression. The treatment options available for symptomatic vertebral hemangiomas are conservative therapy with medications, percutaneous techniques (including but not limited to vertebroplasty, transarterial embolization, and ethanol injection), radiotherapy, and surgery. Since hemangiomas rarely require treatment, and most of the patients are treated by a combination of the abovementioned modalities, the analysis of the efficacy of each treatment is difficult to assess and hence the apt choice of treatment is still controversial.
- Surgery: Urgent surgical decompression is indicated only in patients with compressive hemangiomas causing neurological symptoms. Surgical treatment involves excision (corpectomy/spondylectomy) or decompression or both. Excision is associated with significant blood loss and hence preoperative embolization of the feeding vessels may be considered. Compared to excision, decompression is associated with limited blood loss. Stabilization of the spine should be considered if the resection of the tumor tissue compromises the intrinsic stability of the spine. Anterior strut grafting is considered if corpectomy is done. Posterior stabilization is preferred if the surgery that is performed is wide laminectomy and resection
- Vertebroplasty: The injection of methyl methacrylate into the vertebra increases the strength of the vertebral body and thus prevents the vertebral body collapse in case of severe bony destruction. It has also been reported that the methyl methacrylate injection causes intralesional thrombosis, thus causing healing of the lesion. In cases with compressive symptoms, vertebroplasty can be performed after decompressing the cord through laminectomy
- Ethanol injection: Direct ethanol injection into the lesion causes intralesional thrombosis and destruction of the endothelium of the hemangioma. This eventually causes shrinkage of the lesion, thus relieving the compressive symptoms
- Radiotherapy: Vertebral hemangiomas are radiosensitive lesions affected by the administration of 3000–4000 cGy., It can control the lesion by vascular necrosis and anti-inflammatory effect. Radiotherapy is ineffective as a sole mode of therapy but is used as an adjuvant to surgery to prevent recurrence of the lesion and to eliminate the leftover tumor cells after incomplete surgical removal., In fact, subtotal resection of tumor tissue followed by radiotherapy has been the preferred mode of treatment for these lesions
- Percutaneous transarterial embolization: Hekster et al. reported reversal of spinal cord compression following percutaneous embolization of the feeding vessels. This mode of treatment can hence be used as the sole mode of therapy though most of the surgeons prefer to use this as a presurgical adjunct to reduce the blood loss during resection/decompression surgeries.
Fat predominant lesions are benign in nature when compared to lesions with increased vascular content which have a higher propensity for turning aggressive. Hence, lesions with increased fat content provide a better prognosis. Malignant degeneration of hemangiomas is not known to occur.,
| Conclusion|| |
Although vertebral hemangiomas are very common lesions of the spine that is encountered in clinical practice, most of them are asymptomatic and hence do not require any treatment. The atypical and aggressive types of hemangiomas that require treatment need to be identified by clinical and radiological evaluation. The classical treatment includes decompression/excision of the lesion with stabilization of the spine, followed by radiotherapy for residual lesion. The use of preoperative angioembolization of the feeding vessels to the tumor is a very crucial step, since not doing that may result in torrential bleeding at the time of surgery which can lead to hypotension and even shock. Proper histopathological evaluation of the tumor tissue is warranted to rule out any coexisting plasmacytoma. Proper close follow-up of these patients is of paramount importance as some of these lesions may recur after some time. If hemangiomas are not promptly diagnosed and managed with the utmost care, the patient can develop disastrous neurological symptoms and even paraplegia.
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.
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Conflicts of interest
There are no conflicts of interest.
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[Figure 1], [Figure 2], [Figure 3], [Figure 4], [Figure 5], [Figure 6], [Figure 7], [Figure 8]