- Open Access
The molecular mechanisms on glomangiopericytoma invasion
© Sun et al.; licensee BioMed Central Ltd. 2013
- Received: 15 September 2013
- Accepted: 24 September 2013
- Published: 29 September 2013
To observed the imaging and pathological features of the glomangiopericytoma.
In this paper we report a typical case of glomangiopericytoma arising in the skull base area and summarize the clinical manifestations, imaging and pathological features of such diseases.
Immunohistochemical staining confirmed the tumor cells were strongly positive to Vim, SMA, MSA and negative to CD31, CD34. Partial cells were positive to FVIII. The imaging can’t confirm the diagnosis but indicate the the tumor has intact envelope.The cells in the tumor envelope is positive to Vim and negative SMA and FVIII. These findings were compatible with glomangiopericytoma and the cells in the tumor envelope is not glomangiopericytoma cells.
In view of the clinical and pathological features of the glomangiopericytoma, we believe that the surgery is the best treatment so far and the tumor can be resected completely. The above results can be preliminary reason to explain the low recurrence of such diseases.
Glomangiopericytoma is belonged to a spectrum of lesions which includes myofibromatosis, myofibroma, infantile haemangiopericytoma and myopericytoma. Glomangiopericytoma was first reported as hemangiopericytoma , but this definition has been questioned [2, 3]. In recent years, the concept of hemangiopericytoma has been evolving to myopericytoma because the spindle cells show myoid differentiation with positivity for smooth muscle actin . Glomangiopericytoma have characteristics which have a component of cells with golmus-type features including cuboidal shape, distinct cell borders, clear to eosinophilic cytoplasm and central round nuclei. The etiology is not clear although past trauma, hypertension, pregnancy and use of corticosteroids may be involved .
Clinical information of patients with hemangiopericytoma
Sex (Female, Male)
Risk factors (trauma, hypertension and steroid useare)
Vim(+),SMA(+), CD31(+), CD34(+)
Skull base area
Vim(+),SMA(+), MSA(+), CD31(-), CD34(-)
Vim(+),SMA(+), MSA(+), CD31(-), CD34(-), Des(-)
Dorsum of tongue
Vim(+),SMA(+), CD34(-), Des(-)
This study was approved by Institutional Ethic Committee Office of Shanghai Ninth People’s Hospital (reference number: 2013(88)). Written informed consent was obtained from the patient for the publication of this article and accompanying images.
A 55-year-old woman presented with a 2-month history of right parotid area tumor and intermittency pain, and the patient feel foreign body sensation in right pharyngeal portion. Type-B ultrasonic revealed a solid tumor possibly arising from the deep part of parotid gland. The skin of the parotid gland was free of the tumor. We performed the surgery within a month after the first visit to our department, the patient claimed that the foreign body sensation become serious and the tumor size increased gradually. The border of the tumor is evident and the tumor has intact envelope but which bled very easily, so we did not perform biopsy. With these clinical characteristics and radiographic findings, we supposed the tumor to be benign hypervascular tumor, such as neurinoma, although the possibility of metastatic cancer was not excluded. Considering the location, the tumor occupy the overall right skull base area and which oppress the interal carotid artery, we concluded that the tumor was resectable through submandibular incision and the angle of mandible was cut off. The tumor don’t have obviously stem, and the tumor was removed.
Glomangiopericytoma has been diagnosed as hemangiopericytoma in the past years . Haemangiopericytoma were defined as a group of tumors that develop in the head and neck region , and the WHO unified similar concepts into the category of glomangiopericytoma in 2005. They have a better prognosis despite their similarity to the conventional tumor, and all the four patients above mentioned have not recurrence. They often have histological features that look different from haemangiopericytomas if the tumor cells closely resemble glomus cells and these tumor cells are characterized by round, punched-out central nuclei and pale eosinophilic cytoplasm. The term glomangiopericytoma or sinonasal-type haemangiopericytoma is preferred to describe them. Many cases which mainly arising in the nasal cavity, paranasal sinuses and other parts have been reported in journals [6, 8, 9], but there has been no previous report of glomangiopericytoma in the skull base area. We present a case of glomangiopericytoma of the skull base area. It is worthy to note because it is rare to find such tumors in that region. It is difficult to differentiate the diagnosis from histologically dissimilar lesions that include glomangioma, myopericytoma and angioleiomyoma and differential diagnosis with pleomorphic adenoma of parotid gland, neurinoma, Adenoid Cystic Carcinoma and tumor derived from the meninges et al. In our case, the glomus like cells were arranged in a concentric perivascular array with vimentin, SMA, MSA, CD99, S-100, Bcl-2 positivity and CD31, CD34, CK9, EMA, HMB45, Melan A negativity, which are the histological characteristics of glomangiopericytoma. There have been more than 100 cases of hemangiopericytoma-like tumors have been reported in the nasal cavity and perinasal sinuses , The pathogenesis of glomangiopericytoma is unclear. Although trauma, hypertension and long term steroid use are were specuted to be possible causes of the tumor , the patient denied such histories. The etiology for this patient’s tumor is unclear. Further research into the pathogenesis and prognosis of glomangiopericytoma is needed.
Glomangiopericytoma is considered to be low malignant tumors which have low propensity to metastasize, a recurrence rate of 7% to 40%, and a 5-year survival of 88% or higher [10, 11] and the patients undergoing surgery in our part all have no recurrence. The above phenomenon can get a preliminary explanation. As the HE images show that the tumor has intact envelope and there is clear boundaries between the tumor and surrounding normal tissues (Figure 1C,D). The important thing is that the cells in envelope is not tumor cells and this can be proved by the immunohistochemical staining (Figure 5B, D, E).
In summary, in view of the clinical and pathological features of the glomangiopericytoma, we believe that the surgery is the best treatment so far and the tumor can be resected completely. Of crouse, the large sample search is necessary.
This work was supported by grants of the National Natural Science Foundation of China (NSFC30600714, 30973341), and ShuGuang project (10SG19) supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation, Specialized Research Fund for the Doctoral Program of Colleges and Universities (20110073110078) and Doctoral Innovation Foundation Award (BXJ201132) from Shanghai Jiao Tong University School of Medicine.
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