The role of radiotherapy in intracranial hemangiopericytoma/solitary fibrous tumors : A Turkish Society for Radiation Oncology Central Nervous System Tumors Group Study (TROD 07-008).

Objective: Intracranial hemangiopericytomas (HPC) are rare tumors. Radiotherapy (RT) is frequently performed after surgery, depending on tumor size, location, and the type of resection. Moreover, RT is preferred as an effective treatment for local recurrence and metastasis.

Combination of triple chemotherapy and sequential re-irradiation as salvage for recurrent treatment-refractory hemangiopericytoma of extraspinal dura: a case report.

Introduction: Hemangiopericytoma (HPC) in the central nervous system (CNS) is rare. Our report aims to present an HPC case with multiple surgeries at the lumbar spine, and demonstrates an effective treatment as salvage.

Case Report: In this report, we present the case of a young girl with recurrent meningeal invasion of lumbar spinal HPC.

Hemangiopericytoma following allogeneic hematopoietic stem cell transplantation in a patient with primary plasma cell leukemia: the first case report and literature review.

Background: Hemangiopericytoma (HPC) is a rare secondary tumor after allogeneic hematopoietic stem cell transplantation (allo-HSCT), which has not been reported in the literature. Herein, we reported a case of HPC after allo-HSCT.

Case Description: We reported a case of a middle-aged female patient with primary plasma cell leukemia who presented lumbosacral pain and right lower limb pain and numbness on1684 days post-transplant.

The Clinical Application of Dynamic Contrast-Enhanced MRI in Canine Masses of Mesenchymal and Epithelial Origin: A Preliminary Case Series.

Evaluating masses of mesenchymal and epithelial origin accurately using computed tomography (CT) has several limitations in dogs. This study aimed to present dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) parameters to aid in improving the diagnostic accuracy for masses of mesenchymal and epithelial origin in veterinary medicine. Four dogs diagnosed with benign and malignant soft tissue sarcoma (STS), cholesteatoma, or squamous cell carcinoma underwent CT, conventional MRI, and DCE-MRI.

Solitary Fibrous Tumor of the Larynx: A Case Report and Brief Literature Review.

Solitary fibrous tumors (SFTs) are a rare type of soft tissue tumor first identified as arising from pleura and usually arising in the thoracic cavity. The incidence of SFTs arising in the head and neck region is much lower, accounting for about 7% of SFT cases. Involvement of the larynx specifically is exceedingly rare and can have inconspicuous presentations, making them challenging to diagnose.

Recurrence of Solitary Fibrous Tumor in the Spinal Cord Following Gross Total and Subtotal Resection: A Case Report of Recurrence 19 Years of Post-total Resection and Systematic Literature Review.

Spinal cord solitary fibrous tumors (SFTs), previously known as hemangiopericytoma (HPC), represent exceedingly rare neoplasms. Strategies for their management, such as appropriate follow-up duration, remain controversial due to their propensity for recurrence despite extended periods of quiescence. We report a 51-year-old male presenting with new-onset back pain and gait disturbances, who had undergone gross total resection (GTR) of an SFT within the thoracic spinal cord 19 years ago.

Head and Neck Myopericytoma (MPC): A Case Report of Double Synchronous Sinonasal MPC.

Aim: Myopericytoma (MPC) is a rare tumour characterized by a perivascular proliferation of pericytic cells with myoid differentiation and a typical spindle shape. Except for the rare malignant cases, MPC mostly shows a benign course. Symptoms are often non-specific, and the diagnosis could be accidental.

Spine Stereotactic Radiosurgery Provides Long-Term Local Control and Overall Survival for Benign Intradural Tumors.

Background And Objectives: The role of radiosurgery in the treatment of benign intracranial tumors is well established. However, there are limited long-term follow-up studies on outcomes after stereotactic radiosurgery (SRS) for benign intradural spinal tumors. In this article, we report a large single-institution experience in using SRS to treat patients with benign intradural tumors of the spine.

Central nervous system solitary fibrous tumors: Case series in accordance with the WHO 2021 reclassification. Framework for patient surveillance.

Purpose: Solitary fibrous tumors (SFTs) are a rare type of mesenchymal tumors. The World Health Organization reclassified SFTs in 2021. Currently, guidelines concerning treatment and follow-up are lacking.

Clinical outcomes of patients undergoing reoperation with solitary fibrous tumors/hemangiopericytomas and malignant progression of tumors.

Objective: The purpose of this study was to analyze the clinical outcomes and malignant progression of tumors in patients who underwent reoperation for recurrent solitary fibrous tumors (SFTs) and hemangiopericytomas (HPCs).

Methods: We identified 48 patients who underwent reoperation because of tumor recurrence at Tangdu Hospital between January 2010 and December 2021 and analyzed the clinical outcomes, namely, the rate of gross total resection (GTR), progression-free survival (PFS), overall survival (OS), malignant progression of tumors and radiotherapy. The survival curves for each group were plotted using the Kaplan‒Meier method and compared using log-rank tests.

Solitary Fibrous Tumour of the Mesentery: An Uncommon Site for a Rare Tumour.

Solitary fibrous tumour (SFT), a unique spindle-cell neoplasm, was first identified in the pleura and was earlier named as haemangiopericytoma. The origin of SFT is not well established; however, it has recently been described as a mesenchymal neoplasm, probably arising from the ubiquitous dendritic interstitial cells. SFTs are predominantly benign tumours with a low risk of malignant transformation and are commonly seen in the intrathoracic region, seldom involving extrapleural locations.

A Hemangiopericytoma in the External Auditory Canal: A Rare Clinical Presentation and Management.

Hemangiopericytomas (HPCs) are rare vascular tumors originating from pericytes, with a predilection for the musculoskeletal system and occasional occurrence in the head and neck region. HPCs arising in the external auditory canal (EAC) are exceptionally rare, making their diagnosis and management a clinical challenge. A 71-year-old male presented with a six-month history of a painless, progressively enlarging mass in his right EAC, accompanied by tinnitus and hearing loss.

A case of lumbar spinal solitary fibrous tumor or hemangiopericytomas.

Background: Solitary fibrous tumors (SFTs) account for 3.7% of all soft-tissue sarcomas, with an annual incidence of 0.35/100,000 individuals.

Postauricular Myofibroma of the Facial Canal: A Case Report.

Myofibromatosis is a proliferative disorder characterized by the development of soft tissue neoplasms referred to as myofibromas that predominantly occur in infants and young children. These lesions have been described using varied terminologies since they were first reported in 1951. However, these neoplasms are histopathologically characterized by benign fibroblast and myofibroblast proliferation containing a biphasic presentation of spindle-shaped cells surrounding a central zone of less differentiated cells arranged in a hemangiopericytoma-like pattern in all cases.

Solitary Myofibroma of the oral and maxillofacial regions in pediatric patients: A clinicopathological analysis of ten patients and review of 75 cases.

Background: The imaging manifestations of oral and maxillofacial myofibroma/myofibromatosis can vary among patients. Although many clinical cases have been reported, a consensus on the clinicopathological features of and treatment principles for this disease is lacking.

Purpose: This study aimed to summarize the clinicopathological features of solitary myofibroma of the oral and maxillofacial regions in pediatric patients.

A Radiomics Model for the Differentiation of Intracranial Solitary Fibrous Tumor/Hemangiopericytoma and Meningioma Based on Multiparametric Magnetic Resonance Imaging.

Background: Although the imaging findings of intracranial solitary fibrous tumor (SFT)/hemangiopericytoma (HPC) and meningioma are similar, their treatment and prognosis are quite different. Accurate preoperative identification of these two types of tumors is crucial for individualized treatment.

Objective: The aim of this study was to develop a radiomics model for the differentiation of intracranial SFT/HPC and meningioma based on multiparametric magnetic resonance imaging (mpMRI).

Meningeal solitary fibrous tumor cell states phenocopy cerebral vascular development and homeostasis.

Background: Meningeal solitary fibrous tumors (SFTs) are rare mesenchymal neoplasms that are associated with local recurrence and hematogenous metastasis. The cell states and spatial transcriptomic architecture underlying the unique clinical behavior of meningeal SFTs are unknown.

Methods: Single-cell (n=4), spatial (n=8), and bulk RNA sequencing (n=22) was used to define the cell states and spatial transcriptomic architecture of meningeal SFTs across histological grades and in patient-matched pairs of primary/recurrent or intracranial/metastatic samples.