Radiologic MRI classification of tumor regression grade (TRG) in rectal cancer after neoadjuvant therapy^[1]

TRG	Degree of response	Description
1	Complete	No evidence of ever treated tumor
2	Good	Dense fibrosis/mucin, no obvious residual tumor, no visible intermediate signal
3	Moderate	>50% fibrosis/mucin and visible intermediate signal
4	Slight	Few areas of fibrosis/mucin, mostly tumor
5	No response	Same appearance and signal as original tumor

Reference:

Patel UB, Taylor F, Blomqvist L, et al. Magnetic resonance imaging-detected tumor response for locally advanced rectal cancer predicts survival outcomes: MERCURY experience. J Clin Oncol 2011; 29:3753.

Reprinted by permission from Springer: Annals of Surgical Oncology. Kennedy ED, Pooni A. Selection of patients for organ preservation after chemoradiotherapy: It is too early to exclude any method for assessment of response after CRT. Ann Surg Oncol 2020; 27:2582. Copyright © 2020. https://www.springer.com/journal/10434.

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خرید پکیج

Radiologic MRI classification of tumor regression grade (TRG) in rectal cancer after neoadjuvant therapy[1]

Radiologic MRI classification of tumor regression grade (TRG) in rectal cancer after neoadjuvant therapy^[1]