Comparison of lymphatic vessel density and expression of VEGF-C and VEGF-D lymphangiogenic factors in Warthin's tumours and oncocytic adenomas

Biomedical Papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia
J HozaI Stárek

Abstract

To compare the density of lymphatic vessels and VEGF-C and VEGF-D expression in Warthin's tumours (WTs) and oncocytic adenomas (OCAs). Twenty three WTs and 13 OCAs of the parotid gland were analyzed. Lymphatic vessels were detected using the D2-40 antibody. For evaluation of the intratumour and peritumour lymphatic vessel density (iLVD and pLVD, respectively) the area of greatest vascularisation (hot spots) was chosen, using a ×40 field, and the number of vessels per square millimeter was counted in a ×200 field. The staining intensity for VEGF-C and VEGF-D immunoreaction in the tumour cells was graded from 0 to 3. The mean iLVD and pLVD values in WTs was 4.7 (range 1-8) and 6.9 (range 3-10), those in the OCAs 1.0 (range 0-3) and 5.8 (range 2-8), respectively. The differences in the iLVD, but not pLVD between the two tumour groups were statistically significant. In both entities, the pLVD markedly outnumbered the iLVD. The intratumour vessels in the WTs were present exclusively in the lymphoid stroma. In the group of 23 WTs, 13 (56.6%), 17 (73.9%) and 10 (43.4%) samples revealed positive VEGF-C, VEGF-D and both immunoreactions, respectively. 10 of 13 (77%) cases revealed VEGF-D immunoreaction and in none of them was the VEGF-C ...Continue Reading

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Feb 1, 2020·Experimental and Molecular Pathology·Keila Martha Amorim BarrosoLélia Batista de Souza

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