Corrigendum to mitotic index is predictive for survival for canine cutaneous mast cell tumors

Romansik EM, Reilly CM, Kass PH, Moore PF, London CA. Mitotic index is predictive for survival for canine cutaneous mast cell tumors. Veterinary Pathology. 2007;44(3):335-341. doi: 10.1354/vp.44-3-335

The authors wish to correct a calculation error on page 336. The area for 10 HPF was reported as 2.7 mm² however, that area was calculated incorrectly, and it was 2.37 mm². The configuration of the microscope used for counting mitotic figures in this study was 40X objective and ocular 10X FN 22 mm. The area within one field of view for a microscope with this configuration is 0.237 mm². All steps in counting mitotic figures in each tumor were performed correctly. The descriptor “mitotic index” (MI) should be replaced with “mitotic count” (MC).^1,2

References

1. Bonert M, Tate AJ. Mitotic counts in breast cancer should be standardized with a uniform sample area. Biomed Eng Online. 2017;16(1):28.

2. Meuten DJ, Moore FM, George JW. Mitotic Count and the Field of View Area: Time to Standardize. Vet Pathol. 2016;53: 7-9.

3. Romansik EM, Reilly CM, Kass PH, Moore PF, London CA: Mitotic index is predictive for survival for canine cutaneous mast cell tumors. Vet Pathol 44:335-341, 2007.