Thymic carcinoma MRI

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Alejandro Lemor, M.D. [2]Parminder Dhingra, M.D. [3]

MRI

On chest MRI, thymic carcinoma is characterized by:

• T1: isointense to slightly hyperintense signal compared to muscle
• T2:

• heterogeneous signal, slightly higher than muscle
• cystic areas may be seen, especially in larger tumours
• fibrous septa crossing the mass are of low signal intensity

• In/out phase imaging: typically no signal drop out i.e. no chemical shift
• T1 C+ (Gd): linear regions of enhancement may be seen coursing though the mass, thought to represent fibrous septae