Table 2.

Summary of literature on operative treatment and outcome in patients with cervical spondylotic amyotrophy

	Year	Number of patients	Number of patients of proximal and distal-type	Follow-up	Procedure	Outcome
Ebara et al. [12]	1988	7	Distal-type: 7	N/A	Laminoplasty: 6 Anterior decompression and fusion: 1	Grip strength improved in 6 patients
Matsunaga et al. [30]	1993	2	N/A	N/A	Anterior decompression and fusion	One patient recovered 5 months after surgery, and the other patient did not recover
Kaneko et al. [24]	2004	6	Distal-type: 6	>2 years	Laminoplasty	Grip strength improved in 4 patients
Fujiwara et al. [14]	2006	32	Proximal-type: 24 Distal-type: 8	78 m	Posterior cervical laminoplasty with or without foraminotomy	In proximal-type patients, muscle power improved in 92% of cases but was improved in only 38% of the distal-type cases
Uchida et al. [46]	2009	51	Proximal-type: 37 Distal-type: 14	2.6 years	Anterior decompression and fusion	62% of patients with proximal muscle atrophy gained 1 or more grades of muscle power on manual muscle testing, whereas 64.3% with distal muscle atrophy failed to gain even 1 grade of improvement
Srinivasa Rao et al. [40]	2009	7	Distal-type: 7	46.5 m	Anterior decompression and fusion	6 improved; 1 worsened The mean improvement of the outcome score was 66.7%

N/A not available