Association of stiff-person syndrome with autoimmune endocrine diseases

Table 3 Correlation of associated diseases and glutamic acid decarboxylase autoantibodies among stiff-person syndrome patients

Subgroup	Seropositive		Seronegative		Unknown
	Classical	SLS	Classical	SLS	Classical	SLS
Patient number	3	0	4	2	5	0
Type 1 diabetes mellitus	1	0	0	0	1	0
Latent autoimmune diabetes in adults	1	0	0	0	0	0
Autoimmune thyroid disease	2	0	0	0	0	0
Sjögren syndrome	0	0	1	0	0	0
Myasthenia graves	0	0	1	0	0	0
Malignancy1	0	0	1	0	0	0
Thymoma	0	0	1	0	0	0
Type 2 diabetes mellitus	0	0	0	1	0	0

¹Lung cancer with paraneoplastic syndrome. SPS: Stiff-person syndrome; SLS: Stiff limb syndrome; GAD: Glutamic acid decarboxylase.