MR imaging T2 patterns of 37 primary tumor beds in 37 patients 6 weeks posttreatment, pretreatment and posttreatment details, and clinical outcome at the primary site

Posttreatment T2 Pattern (0–3)	Pretreatment Primary Tumor	Size of Residual Masses (median in cm; range)	Local Failure^{^d}	Local Control^{^e}
0: Complete resolution No focal mass^{^a}	All tumors of expansile intermediate T2 signal without deep extension (size, 1.7–3.6 cm; stage, T4 = 0)	0 (0.0–0.0)	1	2
1: Scar tissue mass Flat-edged/retracted low T2 signal mass^{^b}	All tumors of expansile intermediate T2 signal with deep extension (size, 2.0–5.1 cm; stage, T4 = 4)	1.9 (0.7–2.5)	0	14
2: Indeterminate mass Mass without features defined in pattern 1 or 3	All tumors of expansile intermediate T2 signal with deep extension (size, 1.4–7.3 cm; stage, T4 = 7)	2.0 (1.3–3.2)	6	5
3: Residual cancer mass Focal expansile mass ≥ 1 cm in size of intermediate T2 signal^{^c}	All tumors of expansile intermediate T2 signal with deep extension (size, 2.9–7.3 cm; stage, T4 = 8)	2.6 (2.0–5.4)	9	0

↵a No abnormality or only expected symmetric changes.
↵b Without any other T2 abnormalities in the residual mass.
↵c Irrespective of other T2 signal abnormalities in the residual mass.
↵d Total = 16.
↵e Total = 21.