Hemangiopericytoma

A hemangiopericytoma is a type of soft-tissue sarcoma that originates in the pericytes in the walls of capillaries. When inside the nervous system, although not strictly a meningioma tumor, it is a meningeal tumor with a special aggressive behavior. It was first characterized in 1942.[1]

Hemangiopericytoma
Other namesHPC
Haemangiopericytoma, Gomori methenamine silver stain
SpecialtyOncology, rheumatology 

Diagnosis

Hemangiopericytoma located in the cerebral cavity is an aggressive tumor of the mesenchyme with oval nuclei with scant cytoplasm. "There is dense intercellular reticulin staining. Tumor cells can be fibroblastic, myxoid, or pericytic. These tumors, in contrast to meningiomas, do not stain with epithelial membrane antigen. They have a grade 2 or 3 biological behavior, and need to be distinguished from benign meningiomas because of their high rate of recurrence (68.2%) and metastases (Maier et al. 1992;[2] Kleihues et al. 1993 [3])." [4]

Treatment

Depending on the grade of the sarcoma, it is treated with surgery,[5][6] chemotherapy, and/or radiotherapy.

See also

References
  1. Stout AP, Murray MR (1942). "Hemangiopericytoma: a vascular tumor featuring Zimmermann's pericytes". Ann Surg. 116 (1): 26–33. doi:10.1097/00000658-194207000-00004. PMC 1543753. PMID 17858068.
  2. Maier H, Ofner D, Hittmair A, Kitz K, Budka H (1992). "Classic, atypical, and anaplastic meningioma: three histopathological subtypes of clinical relevance". Neurosurgery. 77 (4): 616–23. doi:10.3171/jns.1992.77.4.0616. PMID 1527622.
  3. Kleihues P, Burger PC, Scheithauer BW (1993). "Histological typing of tumours of the central nervous system". World Health Organization. Berlin : Springer-Verlag (2nd ed.) (30).
  4. Sherman Sojka W MD; Raizer J MD; Dropcho E.J.MD. "Meningiomas". Medmerits: 2.
  5. Yahyazadeh, Seyed Hossein; Malekpour, Nasser; Mousavi, Mehdi; Molanayi, Saadat; Salmanian, Bahram; Mohamadi, Amin (2013). "Malignant Retroperitoneal Hemangiopericytoma: Report of a 73 Years Old Woman and Review of Literature". Thrita. 2 (2): 80–83. doi:10.5812/thrita.10606. ISSN 2352-0620.
  6. Ozaki N, Mukohara N, Yoshida M, Shida T (April 2006). "Successful resection of giant hemangeopericytoma originating from the left atrium". Interact Cardiovasc Thorac Surg. 5 (2): 79–80. doi:10.1510/icvts.2005.124107. PMID 17670519.

Further reading

Schiariti, M; Goetz, P; El-Maghraby, H; Tailor, J; Kitchen, N (Mar 2011). "Hemangiopericytoma: long-term outcome revisited. Clinical article". Journal of Neurosurgery. 114 (3): 747–55. doi:10.3171/2010.6.JNS091660. PMID 20672899.

Classification
External resources
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