Microvascular decompression surgery is effective for the laterocollis subtype of spasmodic torticollis: a long-term follow-up result.
BACKGROUND
Spasmodic torticollis (ST) is characterized by sustained, involuntary, and painful spasms of specific muscle (s), which results into abnormal posture of the neck and head. Although various treatments for ST have been introduced, none of them shows absolute effectiveness. Earlier research from our department showed that microvascular decompression (MVD) surgery is effective in the short-term for ST patients with confirmed accessory nerve compression. However, the long-term outcome of MVD remains unknown.


METHODS
Twelve ST patients with confirmed accessory nerve compression received MVD surgery of their accessory nerves. We utilized the Toronto Western Spasmodic Torticollis Rating Scale (TWSTRS) to evaluate the long-term outcome (5.4 ± 0.87 years).


RESULTS
The MVD lowered total TWSTRS scores by 42.8 % in all ST patients. This result, however, only counted for moderate relief. Interestingly, we observed that the laterocollis (LC) subtypes of ST (n = 3) obtained a higher TWSTRS score improvement (86.9 ± 6.2 %), compared to that of the non-LC (28.1 ± 12 %) (P =0.0001). Additionally, the disability (92.7 ± 2 %) subscale score in the LC subtypes had the most prominent improvement compared to the pain (88.1 ± 5.1 %) and severity (81.3 ± 10.5 %).


CONCLUSIONS
In the cases of confirmed accessory nerve compression, the MVD could be considered as a treatment alternative for ST, especially for the LC subtypes.
Department of Neurosurgery Shanghai Changzheng Hospital, The Second Military Medical University, No 415, Fengyang road, Shanghai, 200003, China.
Qiyong
Q
Mei
Chunfang
C
Zhang
Ying
Y
Jiang
Kehua
K
Sun
Yicheng
Y
Lu
Mingxing
M
Sui
Lijun
L
Hou
D000293:Adolescent; D000328:Adult; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D061145:Microvascular Decompression Surgery; D008875:Middle Aged; D014103:Torticollis / Q000601:surgery*; D016896:Treatment Outcome; D055815:Young Adult