Lymphovascular Invasion

Present/absent. Intra-/extratumoral.

Extramural venous invasion is an adverse prognostic factor: 35% 5-year survival. Often it comprises a tumour-filled longitudinal structure perpendicular to the muscularis propria and with some smooth muscle fibres in its wall. Adjacent "widowed" small arteries and an elastin stain can help identification. The significance of mural lymphovascular invasion is uncertain but should be reported as distinction between lymphatic and small venules can be difficult.

0 0

Post a comment