• Vascular tumors can be further subclassified as being benign, borderline or aggressive, and malignant. (wikipedia.org)
  • Malignant vascular tumors are rare, and include angiosarcomas, and epithelioid hemangioendotheliomas. (wikipedia.org)
  • These cancers vary widely from benign tumors that can be cured by surgery to highly malignant wide spread cancers that need to be treated with multi-modality therapy (surgery, radiation therapy, and chemotherapy). (broomeoncology.com)
  • When malignant tumors are diagnosed, they are typically assigned a grade and stage, depending on the characteristics and behavior of the cells, such as how aggressive the tumors are (likelihood that they will metastasize to the lymph nodes and other parts of the body), where they are located, and whether or not they have already spread beyond the primary site. (drallison.org)
  • Malignant brain and spinal cord tumors are likely to grow quickly and spread into other brain tissue. (kaiserpermanente.org)
  • Both benign and malignant brain tumors cause signs and symptoms and need treatment. (kaiserpermanente.org)
  • Tumors may be benign or malignant (cancerous). (merckvetmanual.com)
  • Malignant tumors can spread and cause harm to the animal. (merckvetmanual.com)
  • Malignant tumors can invade surrounding tissue and spread to distant organs. (merckvetmanual.com)
  • Orbital solitary fibrous tumors routinely exhibit a benign course, but malignant forms with an increased propensity for local recurrence have been reported. (turkishneurosurgery.org.tr)
  • Malignant vascular tumors of bone occur less frequently than hemangiomas. (basicmedicalkey.com)
  • Their behavior ranges from that of indolent, low-grade tumors, such as epithelioid hemangioendothelioma, to that of lethal, high-grade angiosarcomas or hemangiopericytomas. (basicmedicalkey.com)
  • The classification of malignant vascular lesions is still in a state of flux, and controversy continues about the biologic potential of those tumors currently designated as low-grade or borderline endothelial tumors. (basicmedicalkey.com)
  • Benign and malignant tumors of muscle and other mesenchymal origin usually do not distinguish themselves from other malignancies based on appearance alone. (radiologykey.com)
  • Sarcomas comprise about 15% of malignant tumors in dogs, making them among the most common canine cancers you'll see. (wearethecure.org)
  • Generally, sarcomas are malignant tumors that affect the "connective tissues" in the body. (wearethecure.org)
  • Another group of tumors once thought to arise from cells around blood vessels, hemangiopericytoma, is now termed solitary fibrous tumor/hemangiopericytoma, since the tumors all appear to be very similar in terms of their biology. (sarctrials.org)
  • But, they could also be dangerous growths like mast cell tumors, hemangiopericytomas, subcutaneous blood filled hemangiosarcomas, or liposarcomas. (dogcancerblog.com)
  • A right nephrectomy with resection of the mass demonstrated a malignant solitary fibrous tumor. (medscape.com)
  • Due to the similar genetic characteristics it shares with hemangiopericytoma, in 2016, the World Health Organization (WHO) classified it as a single disease called solitary fibrous tumor (SFT)/hemangiopericytoma. (bvsalud.org)
  • Fat forming solitary fibrous tumor, previously known as lipomatous hemangiopericytoma, is a rare variant of solitary fibrous tumor (SFT) ( Korean J Pathol 2014;48:69 ). (pathologyoutlines.com)
  • CT/MRI characteristics may be useful in determining whether a lesion is a benign adenoma and forthcoming ESE-ENSAT guidance suggests a role for 18F-FDG-PET/CT in distinguishing benign vs malignant lesions. (endocrine-abstracts.org)
  • Histologically, the lesions exhibit a lobular growth pattern and are composed of cellular nodules with the classic appearance of SFT, patternless distribution of both oval and spindle shaped cells with uniform spindled nuclei and scant cytoplasm in a variably collagenous stroma and branched, often thick walled, hemangiopericytoma-like vessels ( Ann Diagn Pathol 2018;34:142 ) admixed with adipocyte rich lobules ( Arch Pathol Lab Med 1999;123:941 ). (pathologyoutlines.com)
  • Synovial sarcoma is a malignant soft-tissue neoplasm that most commonly affects the extremities near to, but not in continuity with, large joints. (medscape.com)
  • The study group comprised six leiomyosarcomas, five malignant peripheral nerve sheath tumours, two haemangiopericytomas and one epithelioid haemangioendothelioma. (nih.gov)
  • All leiomyosarcomas were seen in men, whereas malignant peripheral nerve sheath tumours showed no particular sex preponderance. (nih.gov)
  • Leiomyosarcomas were larger tumours than malignant peripheral nerve sheath tumours, mean tumour diameter 15 cm (range 10-25 cm) compared to 9.5 cm (7-15 cm), respectively. (nih.gov)
  • All leiomyosarcomas were situated intraparenchymally whereas two of the five malignant peripheral nerve sheath tumours were endobronchial in site. (nih.gov)
  • Extrathoracic metastates were seen at death in two of the six leiomyosarcomas but not in any of the malignant peripheral nerve sheath tumours. (nih.gov)
  • Overall survival was 28 months although for the leiomyosarcoma/malignant peripheral nerve sheath tumour group alone survival was 8 months. (nih.gov)
  • Dabska tumor can also be classified under the rubric of hemangioendothelioma, a term used for some vascular neoplasms displaying behavior intermediate between entirely benign hemangiomas and highly malignant angiosarcomas. (medscape.com)
  • After that are vascular tumours which can be benign, borderline or malignant. (howmed.net)
  • Borderline and low malignant potential tumours of soft tissues. (ijorl.com)
  • By definition, pseudomesotheliomatous carcinoma refers to an epithelial neoplasm that secondarily involves the pleura and encases the lung, thereby simulating the radiologic and macroscopic appearance of malignant mesothelioma. (medscape.com)
  • The term fibroma is inappropriate because the neoplasm exhibits defined histologic features that differ from those of fibromas and may express malignant behavior. (medscape.com)
  • ABSTRACT: Hemangiopericytoma is a mesenchymal neoplasm that derives from pericytes surrounding the capillaries presenting overexpression of PSMA, which can be a source of pitfall in 68 Ga-PSMA-11 PET/CT. (bvsalud.org)
  • a soft tissue growth that can be either benign or malignant, formed from blood vessels or lymph vessels. (wikipedia.org)
  • However, malignant SFTs, which comprise 10%-15% of SFTs, not only aggressively infiltrate adjacent structures but are also capable of metastatic spread. (medscape.com)
  • The clinical importance is its potentially malignant behavior, with a high local recurrence rate in case of incomplete excision. (tmu.edu.tw)
  • Intracranial hemangiopericytoma (HPC) is a rare tumor well-known for clinically aggressive behavior in growth and infiltration. (spandidos-publications.com)
  • A multicentric, malignant neoplastic vascular proliferation characterized by bluish-red cutaneous nodules, usually on the legs, toes, or feet, that slowly increase in size and number and spread to more proximal sites. (wordinfo.info)
  • Nonmesotheliomatous cancers of the pleura include an assortment of malignant neoplasms that primarily or secondarily involve pleura. (medscape.com)
  • The complications of cytology are hemorrhages, infections, injury of adjacent tissue and dissemination of malignant cells, all of which are considered rare events (Guedes et al . (vin.com)
  • Hemangiopericytoma: A rare sinonasal tumor. (ijorl.com)
  • Sinonasal Hemangiopericytoma (HPC) is a rare vascular tumor originated from Zimmermann's pericyte with not well valuable course. (bvsalud.org)
  • Uterine hemangiopericytoma is extremely rare. (bvsalud.org)
  • In the same case series, we also include a case of malignant hemangiopericytoma which is an extremely rare form of eyelid malignancy worldwide. (org.in)
  • The patient performed an extemporaneous biopsy with subsequent en-bloc removal in operating room, without prior embolization, with the Centripetal Endoscopic Sinus Surgery technique (CESS). (bvsalud.org)
  • Stout AP, Murray MR. Hemangiopericytoma: a vascular tumor featuring Zimmermann's pericytes. (ijorl.com)
  • A case of primary orbital hemangiopericytoma is reported in a 31-year-old female presenting with progressive proptosis of the left eye and deteriorating diplopia over a period of 2 years. (tmu.edu.tw)
  • The hemangiopericytoma is a common tumor in the dog generally arising on the limbs and appearing as a round nodule. (marvistavet.com)
  • It must be distinguished from some of its more malignant cousins so some kind of diagnostic testing is generally recommended. (marvistavet.com)
  • [ 2 ] (1921-2014) originally described DT in 1969 and named it malignant endovascular papillary angioendothelioma of the skin in childhood. (medscape.com)
  • Dabska M. Malignant endovascular papillary angioendothelioma of the skin in childhood. (medscape.com)
  • Sinonasal-type hemangiopericytoma: a clinicopathologic and immunophenotypic analysis of 104 cases showing perivascular myoid differentiation. (ijorl.com)
  • We reported 2 cases with recurrent hemangiopericytoma grade III with high expression of 68 Ga-PSMA-11 in PET/CT. (bvsalud.org)
  • A retrospective analysis of radiological and pathological features of five cases of intracranial hemangiopericytoma was conducted between 2006 and 2012 in the Second Xiangya Hospital of Central South University. (spandidos-publications.com)
  • Treatment outcome and prognostic factors of head and neck hemangiopericytoma: Meta‐analysis. (ijorl.com)