What is the meaning of long T1 long T2 signals in MRI?

Patient's question:

Detailed medical condition and consultation purpose: Hello, my baby is 23 months old and still cannot crawl, stand alone, or walk. Currently, he is 86 cm tall and weighs around 28 pounds. The pediatric experts at the provincial children's hospital recommended an MRI. What should I do?

Doctor's answer:

Hello, the surgical part observed on MRI shows long T1 and T2 signals, which are changes post-surgery. Most of them are likely to be softened foci, indicating an absorbed change after surgery. However, there is nodular enhancement after contrast, accompanied by edema, suggesting that there are still active lesions in the surgical area.
Advice: I don’t know what type of tumor the surgery was for. If it was a glioma, the recurrence probability of this tumor is still quite high. Whether it is a recurrence needs to be compared with your previous follow-up images. If the enhanced lesion is newly appearing or enlarged, it should be considered as a recurrence.

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