Vessel and Mast Cell Densities in Sporadic and Syndrome-associated Peripheral Nerve Sheath Tumors
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Vessel and Mast Cell Densities in Sporadic and Syndrome-associated Peripheral Nerve Sheath Tumors. / Friedrich, Reinhard E; Naber, Urs; Glatzel, Markus; Hagel, Christian.
In: ANTICANCER RES, Vol. 35, No. 9, 09.2015, p. 4713-22.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Vessel and Mast Cell Densities in Sporadic and Syndrome-associated Peripheral Nerve Sheath Tumors
AU - Friedrich, Reinhard E
AU - Naber, Urs
AU - Glatzel, Markus
AU - Hagel, Christian
N1 - Copyright© 2015 International Institute of Anticancer Research (Dr. John G. Delinassios), All rights reserved.
PY - 2015/9
Y1 - 2015/9
N2 - BACKGROUND/AIM: Peripheral nerve sheath (PNS) tumors constitute a heterogeneous group of solid tumors. Neurofibroma and schwannoma are the most frequently diagnosed entities. Both tumor types occur sporadically and are associated with syndromes. Current strategies to fight PNS progression by means of pharmaceuticals aim to specifically interfere with vascular growth factors identified in PNS. Furthermore, malignant transformation of PNS tumors is known to be associated with a change in vascularization. The aim of the study was to investigate vascularization of different PNS tumors with respect to sporadic or syndromal state of the entities.MATERIALS AND METHODS: One hundred and thirty-two formalin-fixed and paraffin-embedded PNS tissue samples were retrieved from the archives of the Institute of Neuropathology, Eppendorf University Hospital. Lymphatic and blood vessels were immunohistochemically identified and morphometrically analyzed in PNS and controls.RESULTS: Blood vessel density in malignant tumors was significantly higher than in benign lesions (30.8/mm(2) vs. 13.46/mm(2)). In the latter, the vessel density resembled that of control tissue. Lymphatic vessel supply was significantly higher in cutaneous neurofibroma and diffuse plexiform neurofibroma (PNF) than in intra-neural localized tumors (schwannoma, nodular PNF). Lymphatic vessels showed no marked differences with respect to tumor entity. Prevalence of mast cells differed markedly between tumor types.CONCLUSION: Different vascularization of PNS may contribute to diverging tumor response following application of anti-neoplastic drugs. Mast cells may have an impact during formation and growth of neurofibroma but are unlikely to be involved in the process of de-differentiation.
AB - BACKGROUND/AIM: Peripheral nerve sheath (PNS) tumors constitute a heterogeneous group of solid tumors. Neurofibroma and schwannoma are the most frequently diagnosed entities. Both tumor types occur sporadically and are associated with syndromes. Current strategies to fight PNS progression by means of pharmaceuticals aim to specifically interfere with vascular growth factors identified in PNS. Furthermore, malignant transformation of PNS tumors is known to be associated with a change in vascularization. The aim of the study was to investigate vascularization of different PNS tumors with respect to sporadic or syndromal state of the entities.MATERIALS AND METHODS: One hundred and thirty-two formalin-fixed and paraffin-embedded PNS tissue samples were retrieved from the archives of the Institute of Neuropathology, Eppendorf University Hospital. Lymphatic and blood vessels were immunohistochemically identified and morphometrically analyzed in PNS and controls.RESULTS: Blood vessel density in malignant tumors was significantly higher than in benign lesions (30.8/mm(2) vs. 13.46/mm(2)). In the latter, the vessel density resembled that of control tissue. Lymphatic vessel supply was significantly higher in cutaneous neurofibroma and diffuse plexiform neurofibroma (PNF) than in intra-neural localized tumors (schwannoma, nodular PNF). Lymphatic vessels showed no marked differences with respect to tumor entity. Prevalence of mast cells differed markedly between tumor types.CONCLUSION: Different vascularization of PNS may contribute to diverging tumor response following application of anti-neoplastic drugs. Mast cells may have an impact during formation and growth of neurofibroma but are unlikely to be involved in the process of de-differentiation.
M3 - SCORING: Journal article
C2 - 26254361
VL - 35
SP - 4713
EP - 4722
JO - ANTICANCER RES
JF - ANTICANCER RES
SN - 0250-7005
IS - 9
ER -