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Spectrum of Perivascular Tumors in a Teaching Hospital: An Indian Study of 16 Consecutive Patients in 5 years

Vaibhav Jansale Nayak* , Vaibhav Jansale Nayak* , Chatura Kasimsetty Ramakantha** , Akshi Katyal***

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Indian Journal of Pathology: Research and Practice 5(3):p 369-375, Sept - Dec 2016. | DOI: DOI: http://dx.doi.org/10.21088/ijprp.2278.148X.5316.22

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Abstract

 Introduction: Separation of perivascular neoplasms from the “waste basket” category of hemangiopericytomas has obviated a need for more detailed look at this newly formed category of neoplasms.The lesions now remaining in perivascular tumor category are ones showing evidence of differentiation towards myoid / contractile perivascular cell and all share a characteristic tendency to grow in a circumferential perivascular fashion. Aims: To delineate the morphological features that characterise perivascular tumors and outline the morphological features seen in them. Methods and Materials: Perivascular tumors diagnosed in our institution over a period of five years were collected, we utilised H&E stained glass slides along with special stains to characterise and delineate the perivascular tumors. Results: 16 cases of perivascular tumors included 1case of glomus tumor, two cases of myopericytoma and thirteencases of myofibroma. One myopericytoma was of classical type while the other was an angioleiomyoma - like myopericytoma. 13 myofibromas could be sub classified into leiomyoma - like, vascular, nodular and multinodular type. Conclusions: Common features highlighted in the study indicate that perivascular tumors are part of a morphologic continuum, with categories defined by researchers being arbitrary. It would be suitable to merge them into a single entity, thus paving the way for use of the term hemangiopericytoma to denote all perivascular tumors, but only after morphological parameters for the usage of the term are clearly defined.

Keywords: Hemangiopericytoma; Myofibroma; Myopericytoma; Glomus Tumor; Angioleiomyoma.

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DOI: DOI: http://dx.doi.org/10.21088/ijprp.2278.148X.5316.22

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