Yolanda has a brain tumor. as the tumor gets bigger, yolanda can no longer form new memories in long-term storage. yolanda most likely has amnesia.

Anterograde amnesia

Explanation:

Anterograde amnesia can be defined as the inability to create new memories, giving rise to partial or complete inability to recall the recent past but the long-term memories formed before then remains intact.

Yolanda has a brain tumor and as the brain tumor gets bigger, possibilities are certain that Yolanda part of the brain is being damaged(hippocampus) which result into Anterograde amnesia because the hippocampus plays a vital role in formation of memories.

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