Final answer:
The correct interpretation of the medical abbreviation 'MRI revealed mod L MCA CVA' is a moderate stroke in the left middle cerebral artery.
Step-by-step explanation:
The correct answer to the student's question 'MRI revealed mod L MCA CVA' is: 'Moderate left middle cerebral artery cerebrovascular accident observed in the MRI'. This is a neurological condition where there is an interruption of blood flow in a region of the central nervous system, specifically in the left middle cerebral artery, which supplies blood to the temporal and parietal lobes of the cerebrum. This event is critically known as a stroke and can result in loss of neurological function and death of brain cells. The moderate descriptor generally indicates the severity could have noticeable symptoms but may not be as severe as a 'severe' classification, which would imply a more critical condition.