| Prognostic Factors of Hemifacial Spasm after Microvascular Decompression. |
| Hong Rae Kim, Deok Joo Rhee, Doo Sik Kong, Kwan Park |
| Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. kwanpark@skku.edu |
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| ABSTRACT |
OBJECTIVE
The factors that influence the prognosis of patients with hemifacial spasm (HFS) treated by microvascular decompression (MVD) have not been definitely established. We report a prospective study evaluating the prognostic factors in patients undergoing MVD for HFS.
METHODS
From January 2004 to September 2006, the authors prospectively studied a series of 293 patients who underwent MVD for HFS. We prospectively analyzed a number of variables in order to evaluate the predictive value of independent variables for the prognosis of patients undergoing MVD. The patients were followed-up at regular intervals and divided into as cured and unsatisfactory groups based on symptom relief. Uni- and multivariate analyses were performed using logistic regression models.
RESULTS
A total 273 of 293 (94.2%) patients achieved symptom relief within one year after the operation.
Intraoperatively, the indentation of the root exit zone was observed in 259 (88.5%) patients. Uni- and multivariate analyses revealed that the symptoms at postoperative 3 months (p<0.001) and indentation of the root exit zone (p=0.036) were associated with good outcomes.
CONCLUSION
The intraoperative finding of root exit zone indentation will help physicians determine the prognosis in patients with HFS. To predict the prognosis of HFS, a regular follow-up period of at least 3 months following MVD should be required. |
| Key Words:
Hemifacial spasm; Microvascular decompression; Prognosis; Chronology |
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