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. 2025 Sep 30;58(3):490–491. doi: 10.5115/acb.24.005E

Morphology and variations of middle cerebral artery: systematic review and meta-analysis

Urvi Sharma 1, Suman Verma 2, Subathra Adithan 3, Ashish Khobragade 4
PMCID: PMC12519002  PMID: 40988362

In this article, the unit “cm” was incorrectly used instead of the correct unit “mm” in the Abstract, Review, and Conclusion sections. The corrected expressions are as follows.

Before correction:

1. Abstract (p. 481)

Thirteen research were combined to determine the proportion of MCA length and pooled proportion was 16.53 cm (15.33 to 17.72 cm); I2=98%; P-value<0.01. Nine studies were combined to determine proportion of MCA diameter and pooled proportion was 2.85 cm (2.52 to 3.17 cm); I2=100%; P-value<0.05. M1 segment mean length is more on left side as compared to right side. Mean length in males (16.57±1.40 cm) is more than females (15.9±1.32 cm). Mean diameter of M1 segment is similar on both sides. Mean diameter in males (3.20±0.09 cm) is higher than females (3.14±0.18 cm).

2. Review (p. 487)

Early bifurcation is MCA branching at 0.5 cm or less from origin. (Fig. 5B) [20]. Jain [73] reported branching at 1.6 cm. According to Dimmick and Faulder [63], it occurred at 1 cm.

3. Review (p. 490)

Pooled mean length was 16.53 cm (95% CI, 15.33–17.72) with Higgins and Thompson I2 value of 98%. Pooled mean diameter was 2.85 cm (95% CI, 2.52–3.17) I2value of 100%.

4. Conclusion (p. 493)

Mean M1 segment length and diameter is 16.53 cm and 2.85 cm, respectively.

After correction:

1. Abstract (p. 481)

Thirteen research were combined to determine the proportion of MCA length and pooled proportion was 16.53 mm (15.33 to 17.72 mm); I2=98%; P-value<0.01. Nine studies were combined to determine proportion of MCA diameter and pooled proportion was 2.85 mm (2.52 to 3.17 mm); I2=100%; P-value<0.05. M1 segment mean length is more on left side as compared to right side. Mean length in males (16.57±1.40 mm) is more than females (15.9±1.32 mm). Mean diameter of M1 segment is similar on both sides. Mean diameter in males (3.20±0.09 mm) is higher than females (3.14±0.18 mm).

2. Review (p. 487)

Early bifurcation is MCA branching at 5 mm or less from origin. (Fig. 5B) [20]. Jain [73] reported branching at 16 mm. According to Dimmick and Faulder [63], it occurred at 10 mm.

3. Review (p. 490)

Pooled mean length was 16.53 mm (95% CI, 15.33–17.72) with Higgins and Thompson I2 value of 98%. Pooled mean diameter was 2.85 mm (95% CI, 2.52–3.17) I2 value of 100%.

4. Conclusion (p. 493)

Mean M1 segment length and diameter is 16.53 mm and 2.85 mm, respectively.

The authors apologize for any inconvenience this mistake may have caused.


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