Absence of extramural venous invasion is an excellent predictor of metastasis-free survival in colorectal carcinoma stage II—a study using tangential tissue sectioning
- Klaus Dirschmid1,
- William Sterlacci1,
- Frank Oellig2,
- Michael Edlinger3,
- Zerina Jasarevic1,
- Michaela Rhomberg1,
- Harald Dirschmid1,
- Felix Offner1
- 1Institute for Pathology, Academic Teaching Hospital Feldkirch, Feldkirch, Austria
- 2Institute for Pathology, Muelheim, Germany
- 3Department of Medical Statistics, Informatics and Health Economy, Medical University Innsbruck, Innsbruck, Austria
- Correspondence to Dr William Sterlacci, Institute for Pathology, Academic Teaching Hospital Feldkirch, Carinagasse 47, Feldkirch 6807, Austria;
Contributors All authors have contributed to the work, read and revised the text and approved the contents of the manuscript.
- Accepted 20 March 2012
- Published Online First 3 May 2012
Aims Extramural venous invasion (EVI) is an important predictor of haematogenous metastasis in colorectal cancer (CRC). However, remarkable discrepancies in incidence rates indicate major problems regarding EVI assessment. The present prospective study applies tangential vessel preparation to CRC resection specimens and correlates results of EVI with metachronous haematogenous metastatic (MHM) spread.
Methods Stage II CRC diagnosed at the Institute of Pathology, University Teaching Hospital Feldkirch, Austria over a period of 30 months were analysed and tangential sectioning of the pericolonic tissue was performed. Confirmation, or exclusion of MHM, as assessed by computerised tomography, sonography or biopsy, was recorded.
Results In 50/79 (63%) cases EVI was detected. In 13/50 (26%), MHM developed. Of the 29/79 (37%) patients without EVI, only one (3.5%) developed MHM. Statistically, the rate of MHM for patients with EVI was independent of adjuvant chemotherapy.
Conclusions Tangential sectioning of the tumour periphery in CRC stage II yields a high rate of histologically evaluable extramural veins and permits proper assessment of EVI. Absence of EVI is significantly associated with metastasis-free survival, a finding of potential therapeutic value. On the other hand, one-third of the patients with EVI and circumferential tumour growth develop MHM, a setting in which the option for adjuvant chemotherapy should be considered. This study emphasises the importance of tangential sectioning of the invasive tumour front in CRC compared with the recommended perpendicular technique. The sensitivity and specificity of this method regarding MHM are characterised.
- Colorectal cancer
- gastrointestinal disease
Competing interests None.
Provenance and peer review Not commissioned; externally peer reviewed.