A rare case of pure primary hemangioma of the scapula: A case report

  • Authors:
    • Wei Li
    • Fan Zou
    • Min Dai
    • Bin Zhang
    • Tao Nie
  • View Affiliations

  • Published online on: August 12, 2015     https://doi.org/10.3892/ol.2015.3596
  • Pages: 2265-2268
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Abstract

Hemangioma is a benign vascular tumor, which may occur in any bone of the body. The most common locations are the spine and craniofacial bone; however, occurrence is extremely rare in the scapula. The current study presented the case of a 58‑year‑old female, with scapula hemangioma in the left shoulder who presented with joint ache that had lasted for ~1 year. The main clinical manifestations included local tenderness, an osseous lump and limited shoulder movement with a little pain, which was alleviated by rest. Roentgenogram, computed tomography and magnetic resonance imaging of the left acromion revealed a mass along the inner surface of the scapula of the left shoulder with polycystic expansion and bone destruction. The results of computed tomography and magnetic resonance imaging indicated a pure primary tumor and the lesion was subsequently resected. Notably, the postoperative pathological diagnosis was capillary hemangioma. The aim of the present study was to analyze the clinical and imaging features of scapula hemangioma, which must be considered for the differential diagnosis of scapula tumors. In the present case, no recurrence was identified by X‑ray examination 1 year after surgery. The long‑term efficacy of surgical treatment requires continuous observation of the patient.

Introduction

Bone hemangiomas are benign lesions originating from new capillaries or cavernous vascular vessels located in the bone. They are characterized by an increased number of normal or abnormal blood vessels. Bone hemangiomas are initially asymptomatic, however, as the tumor grows local pain is often experienced (1). Degradation can occur during the growth of hemangioma (2). These rare, slow growing neoplasms may occur at any age, and account for ~1% of bone tumors (35). Hemangiomas may occur in any bone of the body, most commonly in the spine, craniofacial bone, skull, ribs and long bones (615); however, occurrence in the scapula is extremely rare. Hemangiomas of the long bone or flat bone commonly have a ‘foam’ or ‘honeycomb’ appearance (1618). Bone hemangiomas disrupt the cortex and commonly grow expansively, which may result in the lesions being misdiagnosed as aggressive tumors or osteofibrous dysplasia and infectious processes (9,19). At present, treatments include radiotherapy, surgery and vascular embolization (1). In the present study, a rare case of a capillary hemangioma of the scapula, which proved difficult to diagnose, was presented.

To the best of our knowledge, this is the first case of pure primary hemangioma of the scapula that was misdiagnosed as an osteofibrous dysplasia (20) and treated with surgery.

Case report

In June 2013, a 58 year-old female presented at the First Affiliated Hospital of Nanchang University (Nanchang, China) with intermittent/repeated left shoulder pain, which had lasted for ~1 year. The main clinical manifestations included local tenderness, an osseous lump and limited shoulder movement with a little pain, which was alleviated by rest. The patient was referred to the Department of Orthopedics for further investigation of local tenderness of the scapula. Written informed consent was obtained from the patient for participation in the present study.

The left shoulder joint was investigated by X-ray examination (Fig. 1A), which revealed a mass with bone destruction of the left acromion. The patient had a previous history of hypertension, which had been successfully managed by ongoing antihypertensive drug treatment. Blood tests revealed that the levels of the tumor markers, carcinoembryonic antigen, cancer antigen125 and α-fetoprotein, were within the normal limits. Three-dimensional reconstruction using CT revealed swelling of the left shoulder scapula with bone destruction within the soft tissue mass density. Furthermore, interruption and destruction were identified in the cortex and trabecula of the bone, as well as a slight periosteal reaction and visible lesions with separated shadows; however, the mass boundaries were unclear (Fig. 1B). MRI was performed to confirm the diagnosis, revealing expansive bone destruction of the left scapula acromion. The mass exhibited longer signal intensity on T2-weighted sequences and equal T1-weighted sequences, while the fat suppression sequences presented as a high signal with a small number of uneven signals. Part of the edge appeared a little fuzzy and the soft tissue around the mass did not present abnormal signal intensity. A number of of small dots distributed around the left humeral neck exhibited long signal intensity on T1- and T2-weighted sequences, and high signals in the fat suppression sequences. Furthermore, a small amount of effusion was observed in the left shoulder joint capsule (Fig. 1C). An MRI scan demonstrated no enlarged lymph nodes or distant metastases.

Notably, a mass along the inner surface of the left shoulder scapula with polycystic expansion and bone destruction was identified, which was diagnosed as osteofibrous dysplasia of the scapula. Subsequently, tumorectomy was performed by bone tumor specialists, since the patient did not present any surgery contraindications. Sterile drapes were disinfected and paved routinely in the right lateral position to expose the operative field following the administration of anesthesia. The left acromion was selected as the center transverse incision, followed by skin, subcutaneous, superficial fascia and scapular muscle incisions. The fascia and soft tissue were stripped to expose the acromion, which exhibited expansive bone destruction within a polycystic intratumor with an uneven surface and rich blood supply. The tumor was excised completely and tissue lesions were removed for pathological examination. A wound drainage tube was inserted and each layer of tissue was sutured to allow complete hemostasis. The estimated blood loss was 200 ml and no blood transfusions were required during surgery.

Pathological examination revealed two taupe bones with an irregular shape, measuring between 3.5×3.5×1.5 cm3 and 7×5.0×3.2 cm3, and numerous gray-red broken floccules enclosing the medullary cavity. (Fig. 2A) Light microscopy revealed hyperplasia of the blood vessels between the bone and soft tissue (Fig. 2C), with pipe cavities of different sizes and uneven tube walls, exhibiting hemorrhage, thrombosis and recanalization (Fig. 2B). Based on these findings, the tumor was finally diagnosed as a benign left acromion hemangioma originating from the scapula. The patient underwent follow-up X-ray examination 1 year after surgery, which revealed that symptoms had improved and no evidence of recurrence was identified (Fig. 1D).

Discussion

Hemangioma of the scapula is an uncommon benign vascular tumor, and to the best of our knowledge, no cases have been reported in the literature to date. Thus, the etiology remains unclear. Furthermore, it remains unclear whether all lesions are true neoplasms or should be regarded as hamartomas (2,21). Histologically, four types of hemangioma exist: Capillary, cavernous, venous and mixed. Capillary hemangiomas consist of numerous tortuous small vascular channels lined with epithelium, while the more common cavernous hemangiomas present large dilated vessels lined with a single layer of endothelial cells surrounded by a fibrous stromal layer (22). In general, hemangiomas have a good prognosis with a low recurrence rate (23,24). Although capillary hemangioma of the scapula is extremely rare, it should be considered in the differential diagnosis of scapula tumors. The differential diagnosis may include malignant scapula tumors, such as chondrosarcoma, Ewing's sarcoma, and myeloma or benign scapula tumors, including fibrous dysplasia, osteochondroma, eosinophilic granuloma and aneurysmal bone cysts (22).

Generally, as degradation may occur during the growth of bone hemangioma, the vascular tissue may be replaced by fibrous tissue and achieve self-healing (1). Therefore, asymptomatic patients must be followed-up, without receiving any therapy temporarily. In addition, patients with symptoms or pathological lesions should be followed up as they have a high risk of fracture (25). However, symptomatic patients should receive surgical resection with intralesional ethanol injection, selective arterial embolization, percutaneous vertebroplasty and radiotherapy treatment. It is important to avoid impairing the tumor during surgery as this may lead to severe hemorrhage (26). Thus, preoperative embolization may be beneficial to avoid intraoperative bleeding (27).

With the exception of hemorrhage, the adverse effects of surgery include incomplete removal and long recovery periods (28). The prognosis depends on tumor location and tumor size. Furthermore, it has been reported that the coracoclavicular ligament is a critical component of the acromioclavicular joint, although each component of the joint provides acromioclavicular joint stability in different directions (29). Partial resection, which leads to the destruction of the acromioclavicular joint, does not affect the function of shoulder joint as long as the coracoclavicular ligament is preserved. Surgical excision is the treatment of choice for patients with hemangiomas that have infiltrated the bone and soft tissue, while histological examination confirms diagnosis. In addition, needle biopsy may indicate a definite diagnosis. However, this procedure may be difficult in certain cases, and should be avoided due to the risk of hemorrhage or seeding of the needle tract, unless multiple myeloma or metastatic disease is highly suspected (30,31).

Hemangioma patients are usually asymptomatic and the tumor is often identified incidentally on routine chest roentgenograms. Subsequent CT and MRI scans may reveal the extent of cortical destruction more clearly. The presence of fat density on MRI examinations, well-defined rather than infiltrative borders and sclerotic margins, and a honeycomb appearance are highly suggestive of bone hemangiomas (3234). Ching et al reported that bone hemangiomas commonly exhibit hypointensity on T1-weighted images and hyper intensity on T2-weighted images depending on the quantity of vascularity and adipose tissue (16). Therefore, it is crucial to evaluate every radiological abnormality carefully and possible accompanying disorders should not be ignored when the diagnosis of the disease is confirmed.

In conclusion, accurate diagnosis is essential for the surgical management of hemangioma. Notably, the majority of bone hemangioma cases are accompanied by slight pain; however, the symptoms of the present case included local tenderness, an osseous lump and limited shoulder movement. As it is difficult to identify such lesions on CT and MRI scans, the present case was misdiagnosed, as rare conditions were not considered. Histological observations may help establish a definitive diagnosis; however, the preoperative clinical manifestations and details of the differential diagnosis were overlooked in the present case. Patient age, tumor location, tumor size, possible pathological type and the other aspects must be considered during preoperative assessment due to the high risk of hemorrhage that is associated with bone hemangioma surgery. Thus, intraoperative precautions must be performed to prevent hemorrhagic shock and other adverse consequences during surgery. In the current study, the patient was misdiagnosed with osteofibrous dysplasia based on the clinical manifestations. The results of X-ray examination indicated a diagnosis of left acromion osteofibrous dysplasia; however, three-dimensional computed tomography (CT) and magnetic resonance imaging (MRI) examinations revealed a mass along the inner surface of the left shoulder scapula, with polycystic expansion and bone destruction. Therefore, clinical examination and careful consideration of patient history are key factors for the identification of diseases, particularly tumors. Further diagnostic pathological examination may clarify the diagnosis (35). However, definitive preoperative diagnosis of hemangioma is of great significance to guide treatment. In the present case, the patient was followed-up for 1 year and has achieved full recovery. The current report analyzed the clinical and imaging features of the scapula hemangioma to highlight possible diagnostic and management methods. The results indicated that careful evaluation of all radiological abnormalities is crucial, to avoid potential diseases being overlooked. Furthermore, this study may increase clinical awareness with regard to hemangioma.

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Spandidos Publications style
Li W, Zou F, Dai M, Zhang B and Nie T: A rare case of pure primary hemangioma of the scapula: A case report. Oncol Lett 10: 2265-2268, 2015
APA
Li, W., Zou, F., Dai, M., Zhang, B., & Nie, T. (2015). A rare case of pure primary hemangioma of the scapula: A case report. Oncology Letters, 10, 2265-2268. https://doi.org/10.3892/ol.2015.3596
MLA
Li, W., Zou, F., Dai, M., Zhang, B., Nie, T."A rare case of pure primary hemangioma of the scapula: A case report". Oncology Letters 10.4 (2015): 2265-2268.
Chicago
Li, W., Zou, F., Dai, M., Zhang, B., Nie, T."A rare case of pure primary hemangioma of the scapula: A case report". Oncology Letters 10, no. 4 (2015): 2265-2268. https://doi.org/10.3892/ol.2015.3596