Radiation Oncology/Breast/DCIS/Van Nuys

From Wikibooks, open books for an open world
< Radiation Oncology‎ | Breast‎ | DCIS
Jump to: navigation, search


Van Nuys Prognostic Classification:

  • Group 1 Non-high nuclear grade without necrosis
  • Group 2 Non-high nuclear grade with necrosis
  • Group 3 High nuclear grade with or without necrosis


Original Van Nuys Prognostic Index (VNPI) Scoring Index
Parameter 1 Point 2 Points 3 Points
Van Nuys Classification Group 1 Group 2 Group 3
Clear Margin > or = 10 mm 1-9 mm <1 mm
Lesion Size < or = 15 mm 16-40 mm > 41 mm
Final Score
Group 1 3 - 4 points 3.8% Recurrence 93% 8 year disease free
Group 2 5 - 7 points 11.1% Recurrence 84% 8 year disease free
Group 3 8 - 9 points 26.5% Recurrence 61 % 8 year disease free


Updated USC / Van Nuys Prognostic Index (VNPI)
Parameter 1 Point 2 Points 3 Points
Van Nuys Classification Group 1 Group 2 Group 3
Clear Margin > or = 10 mm 1-9 mm <1 mm
Lesion Size < or = 15 mm 16-40 mm > 41 mm
Age 61 or older 40 - 60 39 or younger
Updated USC / Van Nuys - Total Score
Score Local recurrence 5-yr and 10-yr local RFS
4 - 6 points 1% 99% / 97%
7 - 9 points 20% 84% / 73%
10 - 12 points 50% 51% / 34%


References:

  • 2003 Updated USC/VNPI PMID 14553846 Full text -- "The University of Southern California/Van Nuys prognostic index for ductal carcinoma in situ of the breast." (Silverstein MJ, Am J Surg. 2003 Oct;186(4):337-43.)
    • Added age
    • Score 4-6 : no statistical difference in 12-yr local RFS for pts treated with vs without RT
    • Score 7-9 : 12-15% improvement with RT
    • Score 10-12 : benefit with RT, but very high risk of recurrence despite RT
    • Conclusion: Recommend excision alone for scores 4-6. RT for scores 7-9. Consider mastectomy for scores 10-12
  • 1999 Subsequent report on margins: PMID 10320383 Full text, 1999 (1979-1998) — "The influence of margin width on local control of ductal carcinoma in situ of the breast." Silverstein MJ et al. N Engl J Med. 1999 May 13;340(19):1455-61.
    • Retrospective. 469 pts. Pts treated until 1989 received post-op RT and those treated after 1989 did not. RT was 40-50 Gy to whole breast + 16-20 Gy boost. Tumors were assessed for histologic subtype, nuclear grade, comedonecrosis, maximal diameter, and margin width. Margins were classified as close or involved (<1 mm), intermediate (1 to <10 mm), or wide.
    • RT decreased the recurrence rate for close or involved margins; for intermediate or wide margins, was not statistically different.
    • Conclusion: RT is not necessary for margins > 10 mm.
  • 1996 First report PMID 8635094 — "A prognostic index for ductal carcinoma in situ of the breast." Silverstein MJ et al (and Lewinsky BS). Cancer. 1996 Jun 1;77(11):2267-74.
    • Came up with Van Nuys Prognostic Index (VNPI). Combines tumor size, margin width, histologic classification. Score 1-3 for each to arrive at a total score of 3-9.
    • Evaluated 333 pts treated with excision alone or excision + RT.
    • For pts with VNPI score of 3-4, excellent recurrence free survival (100% vs 97%) whether or not RT was used. For VNPI scores of 5-7, there was a 17% decrease (85% vs 68%) in RFS when RT was used. For score of 8-9, recurrence rate > 60% despite RT.
    • Conclusion: recommend excision alone for score of 3-4, excision + RT for score of 5-7, and mastectomy for 8-9.


Alternative

  • PMID 16750316 -- "Rationalization and regionalization of treatment for ductal carcinoma in situ of the breast." (Smith GL, Int J Radiat Oncol Biol Phys. 2006 Aug 1;65(5):1397-403.) Used classification below for cohort study:


Alternative
Parameter Age Size Histology
0 Points 61+ <=15 mm Grade I-II
1 Points 40-60 16-40 mm Grade I-II + Necrosis
2 Points <40 >40 mm Grade III
  • Low risk: 0
  • Intermediate risk: 1-2
  • High risk: 3-6