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We studied tumour lymphangiogenesis and lymphatic invasion using D2-40 endothelial marker in 35 breast cancer patients treated by primary surgery and correlated it with various clinico-pathological prognostic parameters. Lymphangiogenesis was quantified using lymphatic micro vessel density (LMVD) by counting the immunostained lymphatic microvessels at 200X. The mean age was 45.97±12.09 years (range 30-80 years). LMVD ranged from 5/hpf to 56/hpf with a mean score of 13.4±10.8 and median of 9. The median value of 9 was taken to classify patients into a low or high LMVD. LMVD correlated significantly with tumour size (p=0.003), histological grade (p=0.046), lymph node status (p=0.030). There was no significant correlation of LMVD with stage, estrogen receptor, progesterone receptor or HER2/neu immunoreactivity. Lymphovascular invasion on D2-40 staining [LVI-D40] was found in 13 (37.1%) cases compared to 6 cases (17.1%) on H & E staining showing a poor agreement (k=0.244). LVI correlated significantly with lymph node status (p=0.011). There was a strong association between tumour size (p=0.142), histological grade (p=0.066) though the correlation was not statistically significant. No correlation was found with stage, estrogen receptor, progesterone receptor or HER2/neu immunoreactivity. The mean LMVD in LVI positive patients was higher (22.85±13.29) as compared to LVI negative patients (7.95±2.05) and this was statistically significant (p=0.001). Increased D2-40 detected LMVD and LVI correlated with poor prognostic parameters

Lymphangiogenesis as a Prognostic Marker in Breast Cancer Using D2-40 as Lymphatic Endothelial Marker—A Preliminary Study