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.[2]

Hemangiopericytoma
Other namesHPC
Haemangiopericytoma, Gomori methenamine silver stain
SpecialtyNeuro-oncology
SymptomsPainless mass[1]
Usual onset45 years of age (median)[1]

Histopathology

Hemangiopericytomas are tumors that are derived from specialized spindle shaped cells called pericytes, which line capillaries.[3]

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;[4] Kleihues et al. 1993 [5])."[6]

Treatment

Depending on the grade of the sarcoma, it is treated with surgery,[7] chemotherapy, and/or radiotherapy.

Epidemiology

In one series, the median age of affected individuals was 45 years, with a 10-year survival rate of 70 percent.[1]

See also

References
  1. Enzinger FM, Smith BH (January 1976). "Hemangiopericytoma. An analysis of 106 cases". Human Pathology. 7 (1): 61–82. doi:10.1016/s0046-8177(76)80006-8. PMID 1244311.
  2. Stout AP, Murray MR (July 1942). "Hemangiopericytoma: a vascular tumor featuring Zimmermann's pericytes". Annals of Surgery. 116 (1): 26–33. doi:10.1097/00000658-194207000-00004. PMC 1543753. PMID 17858068.
  3. Gerner RE, Moore GE, Pickren JW (February 1974). "Hemangiopericytoma". Annals of Surgery. 179 (2): 128–132. doi:10.1097/00000658-197402000-00002. PMC 1355764. PMID 4359454. S2CID 220588367.
  4. Maier H, Ofner D, Hittmair A, Kitz K, Budka H (October 1992). "Classic, atypical, and anaplastic meningioma: three histopathological subtypes of clinical relevance". Journal of Neurosurgery. 77 (4): 616–623. doi:10.3171/jns.1992.77.4.0616. PMID 1527622.
  5. 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).
  6. Sherman W, Raizer J. Dropcho EJ (ed.). "Meningiomas". Medmerits: 2. Archived from the original on 2012-03-31. Retrieved 2011-09-19.
  7. Ozaki N, Mukohara N, Yoshida M, Shida T (April 2006). "Successful resection of giant hemangiopericytoma originating from the left atrium". Interactive Cardiovascular and Thoracic Surgery. 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 (March 2011). "Hemangiopericytoma: long-term outcome revisited. Clinical article". Journal of Neurosurgery. 114 (3): 747–755. doi:10.3171/2010.6.JNS091660. PMID 20672899.
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