Glomeruloid Microvascular Proliferation, Desmoplasia, and High Proliferative Index as Potential Indicators of High Grade Canine Choroid Plexus Tumors.

Muscatello, Luisa Vera; Avallone, Giancarlo; Serra, Fabienne; Seuberlich, Torsten; Mandara, Maria Teresa; Sisó, Silvia; Brunetti, Barbara; Oevermann, Anna (2018). Glomeruloid Microvascular Proliferation, Desmoplasia, and High Proliferative Index as Potential Indicators of High Grade Canine Choroid Plexus Tumors. Veterinary pathology, 55(3), pp. 391-401. Sage 10.1177/0300985817754124

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Choroid plexus tumors (CPT) are intraventricular neoplasms accounting for 10% of all primary central nervous system tumors in dogs. They are frequently classified according to the human WHO classification into choroid plexus papilloma (CPP, grade I), atypical CPP (aCPP, grade II), and choroid plexus carcinoma (CPC, grade III). Histological features observed in canine CPT such as increased vascular density (IVD) and glomeruloid microvascular proliferation (GMVP) are not part of the WHO classification. This multi-centric study aimed to investigate tumor-associated vascular hyperplasia in dogs by determining the prevalence of GMVP and IVD in 52 canine CPT and their association with tumor grade. In addition, the expression of angiogenic factors was assessed by immunohistochemistry in 25 tumors to investigate the pathogenesis of tumor-associated vascular hyperplasia. Based on the classical histological hallmarks, this study of 52 CPT identified 22 (42%) CPP (grade I) and 30 of (58%) CPC (grade III). GMVP was more prevalent in CPC (13/30; 43%) than CPP (1/22; 4%), whereas IVD occurred to a similar extent in CPP and CPC. Desmoplasia was more common in CPC (19/30; 63%) than CPP (2/22; 9%), and similarly, the proliferative index (PI) of neoplastic epithelium was significantly higher in CPC (5.14%) than CPP (0.94%). The majority of CPT expressed platelet-derived growth factor (PDGF), PDGFRα, PDGFRβ, and vascular endothelial growth factor (VEGF) irrespective of tumor grade or tumor-associated vascular hyperplasia. These results suggest that tumor-associated GMVP, desmoplasia, and PI may serve as histological indicators of malignancy in CPT.

Item Type:	Journal Article (Original Article)
Division/Institute:	05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Experimental Clinical Research 05 Veterinary Medicine > Research Foci > NeuroCenter 05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH)
UniBE Contributor:	Seuberlich, Torsten, Oevermann, Anna
Subjects:	500 Science > 570 Life sciences; biology 600 Technology > 610 Medicine & health 600 Technology > 630 Agriculture
ISSN:	1544-2217
Publisher:	Sage
Language:	English
Submitter:	Anna Oevermann
Date Deposited:	06 Jun 2018 16:39
Last Modified:	05 Dec 2022 15:14
Publisher DOI:	10.1177/0300985817754124
PubMed ID:	29402204
Uncontrolled Keywords:	angiogenic growth factors central nervous system choroid plexus carcinoma choroid plexus papilloma dog histology immunohistochemistry microvascular proliferation
URI:	https://boris.unibe.ch/id/eprint/117022