Haemangiopericytoma (original) (raw)

Orbital lipomatous haemangiopericytoma: an unusual variant

Clinical and Experimental Ophthalmology, 2002

Haemangiopericytoma (HPC) of the orbit is a rare tumour occurring in all age groups and presenting with slowly progressive proptosis, ocular motility impairment and visual loss. Although most are benign tumours that are resectable at diagnosis, one-third of these tumours demonstrate malignant features and recur locally or metastasize, usually with a fatal outcome. In 1995, a morphologically unique variant, termed lipomatous haemangiopericytoma (L-HPC), was described.

Treatment of recurrent orbital haemangiopericytoma with surgery and proton beam therapy

British Journal of Ophthalmology, 2005

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Intracranial Haemangiopericytoma : Case Report

2014

A rare case of an intracranial haemangiopericytoma with extra-cranial extension in a 60-year-old female patients’ is presented. Intracranial haemangiopericytomas are uncommon, dural-based tumors. It is classified as a tumor of uncertain origin in the WHO system.Haemangiopericytomas arise from Pericytes of Zimmerman that surround capillaries and not archetypical meningothelial arachnoid cap cells. Most frequently they arise in soft tissue sites, but rarely present in the CNS. Macroscopically many haemangiopericytomas resemble meningioma but are distinct histologically. These tumors show more aggressive natural history. Vascular nature suggests a different therapeutic approach thus fore warning a surgeon to a potentially more challenging resection.

Metachronous Haemangiopericytomas: Rare Vascular Entity

EJVES Extra, 2005

Haemangiopericytomas is a rare vascular tumour. The trunk and lower extremities are involved in most cases. Fifteen to twenty percent of haemangiopericytomas arise in the head and neck. We describe a case of a benign metachronous haemangiopericytoma in a 33-year-old man. The lesions were dealt by prompt surgical excision. This case highlights the need of close long-term follow-up of such patients with haemangiopericytoma even when benign.

Cerebral Haemangiopericytoma Treated with Conservative Surgery and Radiotherapy

Clinical Oncology, 2000

Cerebral haemangiopericytomas are rare tumours that resemble meningiomas but behave more aggressively, with a tendency to metastasize. We report two patients with haemangiopericytoma who had limited surgical resections owing to perioperative blood loss but who had massive tumour shrinkage after a course of radical radiotherapy. We suggest a more conservative surgical approach to the management of these tumours.

Haemangiopericytoma: histological spectrum, immunohistochemical characterization and prognosis

Veterinary Dermatology, 2002

Canine haemangiopericytoma (CHP) is a vascular neoplasm thought to be derived from pericytes. The histological pattern and immunohistochemical profile were studied in 31 CHPs. Twenty-three subjects were followed for 2 years to evaluate the correlation among tumour location, histotype, immunostaining and outcome of the disease. Of the 31 CHPs examined, 20 exhibited a perivascular whorled pattern, 8 were storifom and 3 were epithelioid. All tumours were positive for vimentin and negative for cytokeratin, factor VIII-related antigen, glial fibrillary acidic protein and S-100 protein. Seventeen CHPs were positive for actin and nine co-expressed desmin. Six CHPs were also positive for CD34 antigen. The panel of immunohistochemical markers used confirmed the vascular lineage of CHP and aided in the exclusion of other mesenchymal tumours. Of the 23 dogs submitted to follow-up, 6 had recurrence or metastases of the primary tumour. The epithelioid pattern or a noncutaneous location were associated with a poorer prognosis.

Bilateral multiple cavernous haemangiomas of the orbit

British Journal of Ophthalmology, 1992

Orbital cavernous haemangioma, a common orbital tumour, is usualiy single and unilateral. We report the first case of histologically confirmed bilateral multiple cavernous haemangiomas of the orbit.

Extremity haemangiopericytoma, a case report from Nigeria

African health sciences

Haemangiopericytoma is an uncommon soft tissue sarcoma of vascular origin. It occurs more frequently in the extremities than elsewhere in the body although it can arise in any organ. Wide surgical excision is the mainstay of treatment. However, adjuvant radiotherapy and chemotherapy are desirable because the malignant nature of this tumour is frequently unpredictable. Adjuvant therapy is recommended for metastases, recurrence and incomplete resection. Long term follow up is essential in all cases as recurrence can occur several years after treatment. Where little or no experience with managing this tumor exists, it is important to be aware of its clinical behaviour and the treatment options, hence this case reports.

Conjunctival haemangiopericytoma

British Journal of Ophthalmology, 1994

Elevation ofthe rightptotic eyelid with clenching the teeth Figure.1 The patient's right upper eyelid, which c..