Lumbar Spinal Epidural Capillary Hemangioma: A Case Report and Literature Review

Shiying Wu; Krishan Kumar Sharma; Chi Long Ho

doi:10.12659/AJCR.936181

. 2022 Jul 14;23:e936181-1–e936181-9. doi: 10.12659/AJCR.936181

Lumbar Spinal Epidural Capillary Hemangioma: A Case Report and Literature Review

Shiying Wu ^1,^B,^C,^D,^E,^F,^✉, Krishan Kumar Sharma ^2,^B, Chi Long Ho ^1,^3,^4,^5,^A,^B,^C,^D,^E,^F

PMCID: PMC9295191 PMID: 35831983

Abstract

Patient: Female, 38-year-old

Final Diagnosis: Spinal capillary hemangioma

Symptoms: Leg cramp • low back pain • paresthesia • unsteady gait

Medication: —

Clinical Procedure: Surgical resection

Specialty: Radiology

Objective:

Rare disease

Background:

Capillary hemangiomas are often seen on the skin of young individuals and are rarely found in the spine. These vascular lesions can arise from any spinal compartment, although they are more commonly found in the intradural extramedullary (IDEM) than the epidural location. We present a unique case of a woman with a histologically proven spinal epidural capillary hemangioma (SECH). The imaging and histopathological characteristics, as well as the treatment strategy of this vascular lesion, are highlighted along with a comprehensive review of the literature.

Case Report:

A 38-year-old woman presented with progressively worsening low back pain that radiated to both legs. Neurological examination revealed a weakness of the left leg without sensory loss. Magnetic resonance imaging (MRI) demonstrated an epidural tumor at L1–L2 level, making an obtuse angle with the cerebrospinal fluid (CSF) on sagittal T2-weighted images. The patient underwent a complete tumor resection without complications or recurrence. The histology revealed a capillary hemangioma.

Conclusions:

SECH is exceedingly rare, with only 22 cases in the reported literature. Females are more commonly affected than males, and the thoracic spine is more commonly involved than the lumbar spine. SECH often mimics other epidural and IDEM lesions, leading to misdiagnosis. MRI is useful to differentiate SECH from lesions in the various spinal compartments; additionally, MRI is essential for preoperative planning and patient surveillance. Preoperative embolization is an option given the high vascularity of SECH. Surgery is the mainstay treatment, with a good prognosis, in most cases without recurrence.

Keywords: Epidural Neoplasms; Hemangioblastoma; Hemangioma, Capillary; Paraganglioma

Background

Hemangiomas are congenital vascular malformations, classified according to the predominant vascular morphology: cavernous, capillary, arteriovenous or venous [1]. Capillary hemangiomas are the most common subtype [1]. They occur frequently in the skin and soft tissues of younger individuals and are rarely found in the central nervous system (CNS) [2,3]. Capillary hemangiomas can arise from any compartment of the spine, although they are more commonly found in the intradural extramedullary (IDEM) location [2]. Spinal epidural capillary hemangiomas (SECH) are exceedingly rare. We here present a unique case of a woman with a histologically proven SECH in the upper lumbar spine. The imaging and histopathological characteristics, as well as treatment strategy of this abnormally located vascular lesion in the spine, are highlighted along with a comprehensive review of the literature.

Case Report

A 38-year-old ethnic Malay woman presented to the emergency department with progressive worsening low back pain and radiating pain to both thighs and the lateral aspect of the left calf. In addition, she was concerned about her unsteady gait and episodes of leg cramps followed by ‘pin and needles’ paresthesia in both thighs, including the knees. Her symptoms had worsened over the last 3 months such that she had difficulty riding a motorcycle. She had no significant past medical history. Neurological examination revealed a diffuse mild weakness of the muscles of the left leg (4/5) without any loss of sensation to pain or temperature. The initial lumbar spine radiograph was unremarkable. She was subsequently seen at the outpatient orthopaedic service with persistent symptoms.

Magnetic resonance imaging (MRI) of the lumbar spine (Figure 1A–1G) was performed using a 1.5 Tesla MR system (MAGNETOM Avanto, Siemens, Erlangen, Germany). The following MRI protocol was conducted: axial and sagittal T1-and T2-weighted, and post gadolinium axial and sagittal T1-weighted fat-saturated sequences. MRI showed a well-defined and homogeneous enhancing lesion in the posterior aspect of the spinal canal at the L1–L2 level, measuring approximately 1.1×2.0×5.0 cm (anteroposterior x transverse x craniocaudal) in size. The lesion formed an obtuse angle with the adjacent cerebrospinal fluid (CSF) on the sagittal T2-weighted image (Figure 1B). There were no significant intratumoral flow voids. Sagittal (Figure 1B) and axial T2w (Figure 1E) images showed anterior displacement and compression of the cauda equina and the posterior dura layer by the tumor. As the epidural lesion was covered by an overlying dura, it has the appearance of a “marble under the carpet” where the marble represents the lesion and the carpet resembles the dura mater [4].

Surgical resection was indicated based on the progression of the patient’s symptoms and the degrees of compression on the cauda equina. The patient underwent L1–L2 laminectomy with complete tumor excision without complications. Preoperative embolization was not deemed necessary given the lack of intratumoral flow voids on the diagnostic MRI study. Histopathological examination revealed a capillary hemangioma (Figure 2A, 2B). Oral analgesics and intravenous opioids were administered for postoperative pain management. There was a gradual improvement of her gait and reduction of paresthesia in her legs. She was discharged on the fourth postoperative day after a short course of physiotherapy and occupational therapy. There was no evidence of clinical or radiological recurrence over 3 years of follow-up after surgery.

Figure 2. — (A) Lower magnification photomicrograph showing numerous small and thin-walled capillaries lined by single-layered bland endothelia separated by mature adipose tissue. There is no evidence of cytologic atypia [Hematoxylin and eosin (H&E) stain magnification, ×10]. Histological findings are compatible with a capillary hemangioma with fatty involution. (B) Higher magnification photomicrograph showing again numerous thin-walled capillaries lined by single-layered bland endothelia with fatty involution. No evidence of cytologic atypia is detected (H&E stain, magnification, ×20). Histological findings are compatible with a capillary hemangioma with fatty involution.

Discussion

Capillary hemangiomas in the epidural location are exceedingly rare, with only 22 reported cases (including our current case) thus far in the literature (Table 1). Most patients present in their fourth to fifth decades of life, with ages ranging from 17 to 69 years and a median age of 49.2 years (Table 1). There is a slight predilection for females, with the male-to-female ratio of 9: 13. These benign vascular lesions occur more frequently in the thoracic (16/22, 72%) than the lumbar spine (6/22, 27%) (Table 1). Half of the cases showed foraminal extension, which allowed differentiation from cavernous hemangioma [1]. Owing to the slow-growing nature of SECH, most patients present with back pain, progressive myelopathy, or radiculopathy (Table 1) [2,5]. There were a few post-traumatic-related cases of SECH without a definite pathophysiological cause identified.

Table 1.

Summary of all the reported cases of spinal epidural capillary hemangioma in the literature.

First Author, year	Age (years)/gender	Presenting symptoms	Epidural location	Other (MRI) features of tumor	Laminectomy, resection	Outcomes
Gupta, 1996 [17]	50/M	BP, myelopathy, weakness LL	T8–10	Post-contrast enhancement	TR	NR, GR
Badinand, 2003 [18]	40/F	Gait disturbance, LL pain, incontinence	T2–4	T3–4 foraminal extension	TR	NR, GR
Kang, 2006 [19	56/M	Radiating chest wall pain	T2–4	Dumbbell-shaped	PR	NR, GR
Tekin, 2008 [20]	56/F	BP, radiates to R thigh, L4 hypoesthesia	L3–4	Heterogeneous with flow voids	TR	NR, symptoms improved
Akhaddar, 2010 [21]	19/F	BP, progr gait disturbance	T5–6	Homogeneously-enhanced, foraminal extension	TR	NR, GR
Hasan, 2011 [22]	57/M	BP, progr myelopathy, weakness LL	T10–12	Foraminal extension	PR	NR, symptoms improved
Shilton, 2011 [23]	47/F	BP, thoracic myelopathy (post-traumatic)	T7–8	Foraminal extension	TR	NR, symptoms improved
Vassal, 2011 [24]	59/F	BP, R intercostal neuralgia	T5–7	Intrathoracic extension	TR	NR,GR
Seferi, 2014 [25]	58/M	BP, paraparesis, sensory disturbance	T2–4	Foraminal extension	TR	NR, GR
Gencpinar, 2014 [26]	17/F	Weakness LL	T3–7	Foraminal extension	TR	NR, GR
Garcia-Pallero, 2015 [27]	67/F	Dyspnea, pleural effusion	T4–5	Heterogeneous paravertebral tumor with intrathoracic extension	TR	NR, GR
Egu, 2016 [28]	60/F	BP, S1 radiculopathy	L5-S1	Homogeneous enhancing	TR	NR, symptoms improved
Kilic, 2017 [29]	40/M	BP, L LL pain (post-traumatic)	L1	Vertebral body, pedicle and transverse process	TR	NR
Rajeev, 2017 [30]	50/M	Paraparesis LL	L1–2	Enhancing mass, foraminal extension	TR	NR, symptoms improved
Brasil, 2018 [1]	69/F	BP	T9–10	No extension	TR	NR
Xu, 2018 [12]	57/M	BP, LL weakness	T2–3	Foraminal extension	TR	NR, symptoms improved
Cofano, 2019 [31]	52/F	BP	T6–9	Foraminal extension	TR	NR
Sudir, 2019 [32]	63/M	BP, LL weakness (post-traumatic)	T6–8	Vertebral body, pedicle and transverse process	TR	NR
Niznick, 2020 [14]	51/F	Sensory and gait disturbances	T5–6	Foraminal extension	TR	NR
Rajpal, 2020 [15]	29/F	Flank pain	T7	Foraminal and intrathoracic extension	TR	NR
Doi, 2021 [33]	47/M	BP, LL pain, sensory disturbance, incontinence	L2–4	Also involves spinous process and laminae	PR	NR
Current case	38/F	Progr BP, gait disturbance, LL weakness and paresthesia	L1–2	Homogeneous enhancement	TR	NR, symptoms improved

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BP – backpain; GR – good recovery; F – female; L – left; LL – lower leg, M – male; NR – no recurrence or residual tumor; progr –progressive; PR – partial resection; R – right; TR – total resection.

Capillary hemangiomas can arise from the vasa nervosum or blood vessels of the nerve roots in the cauda equina, the surface of the dura, or the pial surface of the spinal cord, but none were found within the spinal cord [2]. Histologically, capillary hemangiomas are characterized by lobules of thin-walled and irregular capillary-sized vessels lined by endothelial cells, enveloped by fibrous stroma or capsule. They are often associated with feeding vessels [6].

MRI is the primary imaging modality for diagnosis, pre-treatment planning, and surveillance of all spinal lesions, including SECH (Figure 3). The advantages of MRI are the ability to narrow the differential diagnosis by defining the tumor location, signal characteristics, and the relationship of the mass to the cord, dura, and nerve root [7]. In addition, it can help to identify multiple or secondary lesions along the spine, including metastatic deposits, drop metastases, and large feeding or draining vessels [8]. Typical MR imaging features of capillary hemangioma include well-circumscribed tumor margins and typical location in the posterior portion of the spinal canal. SECH can occasionally efface the posterior epidural fat of the spine without involving the posterior elements of the vertebra (Figure 1C). The tumor often demonstrates T1-weighted isointensity relative to the spinal cord and T2-weighted hyper-intensity, as well as avid and homogeneous post-contrast enhancement [2,8,9]. The presence of flow voids and/or avid enhancement of the tumor is reflective of its vascular nature [10]. These features are, however, non-specific, hence it can be challenging to distinguish SECH from other epidural tumors on imaging. Histologic confirmation is necessary in most cases. Examples of other spinal epidural tumors include metastases, multiple myeloma, lymphoma, hemangiopericytoma, meningioma, Ewing’s sarcoma, and myeloid sarcoma (Table 2) [11]. Common metastases to the spine usually originate from a non-CNS primary malignancy (eg, breast, lung, prostate, renal, gastrointestinal and thyroid carcinoma) [12]. The common nonneoplastic lesions found in the epidural compartment include disc herniation, epidural hematoma, lipomatosis, venous plexus, and abscess (Figure 3) [13].

Table 2.

Differentiating spinal epidural capillary hemangioma from other epidural and intradural extramedullary tumors.

Compartment	Spinal tumors	Prevalent age-group	Typical location	Pre-contrast MR signal intensity	Post-contrast enhancement	Other imaging features
Epidural	Metastases	Incidence ↑ with age (typically >40 years old)	Predilection for the posterior elements.	T1↓ T2↑↔	Enhances	Predilection for the posterior elements, may have cortical destruction with associated soft tissue mass. Commonly seen in breast, lung, prostate, renal, gastrointestinal, and thyroid
	Multiple myeloma (MM)	E. Ads M>F	Any vertebral body, typically sparing the pedicles (vs metastases/malignancy pedicles involved) [16]	Osseous (T2↑ T1↓) Extraosseous T2↓	Avid Homogeneous	Extraosseous lesions contiguous with bone, often larger and occur in a paraspinal or epidural location. MM can be associated with collapsed vertebral body, and cord compression
	Ewing sarcoma	Chd, Y. Ads	Thoraco-Lumbar	T2↑ T1↓	Heterogeneous enhancement of tumor and affected vertebrae	CT scan: Lytic permeative destruction
	Primary vertebral lymphoma (commonly NHL type)	Ads (5^th–7^th decades), M>F (8: 1)	Lesions arise from epidural lymphoid tissue along the thoracic and lumbar spine	T2↑	Homogeneous	Restricted diffusion with markedly low ADC
	Spinal epidural capillary hemangioma	Ads (4^th–5^th decades) M<F (9: 13)	Thoracic > lumbar spine (16: 6)	T2↑ T1↓	Homogeneous	Foraminal extension in 50% of cases
	SFT/HPC	Ads (4–6 decades) M>F	Thoracic >cervical >lumbar	T1↔, T1↓ T2↑	Intense homogeneous
IDEM	Meningioma	Ads, F>M (9: 1)	Thoracic > cervical	T2↔, T2↑	Intense homogeneous	Broad-based dural attachment and CSF cleft sign. Commonly – solitary; multiple lesions in MEN type II
	Schwannoma	Y. Ads M>F	Dorsal nerve root, neural foramen Thoracic >cervical	T2↑	Homogeneous or inhomo-geneous	Cysts and necrosis. Commonly – solitary; multiple lesions in MEN type II
	Paraganglioma	Ads M>F	Conus, cauda equina	T2↔, T2↑	Mildly inhomoge-neous “salt-and-pepper” appearance due to prominent flow voids	Hemosiderin from prior hemorrhage (T2↓ rim “cap sign”) detected on T2 and GRE sequences
	Myxopapillary ependymoma (13% of all spinal ependymomas)	Y. Ads, M>F	Conus medullaris, cauda equina	T2↑ at tumor margin (hemosiderin)	Typically homogeneous (except hemorrhage)	Hemorrhage detected on GRE sequences

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ADC – apparent diffusion coefficient; Adol – adolescent; Ads – adults; Chd – children; CT – computed tomography; E – elderly; F – females; GRE – T2*-weighted gradient-recorded echo; HPC – hemangiopericytoma; IDEM – intradural extramedullary; M – men; MEN – multiple endocrine neoplasia; MR – magnetic resonance; NHL – non-Hodgkin’s lymphoma; SFT – solitary fibrous tumor; Y – young; symbols: ↑ – hyperintense; ↓ – hypointense; ↔ – isointense.

Capillary hemangiomas are also found in the intradural extramedullary (IDEM) compartment with a predilection for the conus and the lumbar spine [2]. It can be challenging to identify the correct compartment from where the lesion arises. Epidural tumors commonly obliterate the CSF space within the spinal canal, unlike IDEM, in which the surrounding CSF space is preserved (Table 2) [2]. Additionally, the dura and the thecal sac would be displaced together, away from the epidural mass. An obtuse angle is typically formed between the epidural mass and the adjacent CSF with a ‘marble under the carpet’ appearance on sagittal T2w images; the marble represents the tumor and the carpet resembles the overlying dura mater [4]. The cord may appear widened in one plane due to pressure from the epidural mass, surrounded by a thin layer of contrast [4].

Conversely, IDEM tumors commonly form an acute angle with the cord/CSF on sagittal T2w images, giving the appearance of “marble on the carpet” (Figures 1, 3).

Capillary hemangiomas are often misdiagnosed radiologically as being meningiomas and schwannomas; all of them demonstrate avid post-contrast enhancement [9]. Meningioma usually shows T1-weighted iso- or slight hypointensity, and iso- or slight T2 hyperintensity [9]. The ‘dural-tail sign’ is not always a reliable feature to differentiate between meningioma and capillary hemangioma, since the latter occasionally arises from the surface of the dura mater, resembling a dura-tail. Other imaging characteristics of meningioma such as the ‘CSF cleft sign’ and bony hyperostosis are perhaps more useful distinguishing features. Schwannomas are typically hypointense on T1-weighted and hyperintense on T2-weighted images with occasional cystic change or necrosis, which can distinguish them from capillary hemangioma [9]. The precise preoperative differentiation between meningioma/schwannoma from capillary hemangiomas is not crucial to management, since these are non-aggressive tumors. Vascular lesions in the spine with flow voids often mimic capillary hemangioma and vice versa; these include paraganglioma, intradural arteriovenous malformation/fistula (AVM/AVF), and hemangioendothelioma [10]. Paragangliomas contain vascular flow voids in the form of ‘salt-and-pepper’ appearance (unlike capillary hemangiomas), while hemangioendothelioma involves the vertebral bodies as osteolytic lesions with soft tissue components in the epidural space [10]. AVM/AVF typically appear as serpiginous structures in the perimedullary regions of the spine (Table 2) [10].

Analysis of the configuration and location of tumors on MRI is highly important for surgical planning and to guide tumor resection (Table 2). In addition, the tumor extension and vascularity can be better assessed on MRI [3,8].

Although considered benign, capillary hemangiomas can cause spinal cord or cauda equina compression, as well as foramina extension ([15] – see Table 1). There is also the risk of rare hemorrhagic complications due to the vascular nature of the lesion. Surgery should be considered even in the absence of neurological symptoms. To reduce intraoperative hemorrhage, preoperative angiography and/or embolization can be considered4[3,6]. In our case, preoperative embolization was not deemed necessary given the lack of intralesional flow voids on the diagnostic MRI study. With adequate preoperative planning, total surgical resection can be achieved in most cases by carefully dissecting the lesion away from the dura while exercising judicious hemostasis by eliminating all arterial feeders. The prognosis is good, in most cases with no recurrence (Table 1).

Conclusions

MRI is essential for diagnosis, preoperative planning, and patient surveillance. Knowledge of the MRI characteristics of spinal lesions and their locations within the spinal compartments can help narrow their differential diagnosis. SECH can be differentiated from IDEM lesions, whereby these lesions form obtuse and acute angles with the CSF, respectively. Some SECH demonstrate foraminal extension distinguishing them from cavernous hemangioma. Nevertheless, surgical resection is the mainstay treatment for capillary hemangioma, with a good prognosis, in most cases without recurrence.

Acknowledgments

Dr. Kesavan Sittampalam from the Department of Pathology, Singapore General Hospital, provided assistance in histopathology image analysis.

Footnotes

Department and Institution Where Work Was Done

Department of Radiology, Sengkang General Hospital, Singapore.

Declaration of Figures’ Authenticity

All figures submitted have been created by the authors who confirm that the images are original with no duplication and have not been previously published in whole or in part.

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[b1-amjcaserep-23-e936181] 1.Brasil AVB, Rohrmoser RG, Gago G, Cambruzzi E. Atypical spinal epidural capillary hemangioma: case report. Surg Neurol Int. 2018;9:198. doi: 10.4103/sni.sni_90_18. [DOI] [PMC free article] [PubMed] [Google Scholar]

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PERMALINK

Lumbar Spinal Epidural Capillary Hemangioma: A Case Report and Literature Review

Shiying Wu

Krishan Kumar Sharma

Chi Long Ho