Table 2.

Clinical findings in the 2 fibromyalgia-diagnosed patients who were found to have myotonic dystrophy type 2

	Patient 1	Patient 2
Age at fibromyalgia diagnosis, years	45	39
Age at evaluation, years	48	45
Age at symptom onset, years	38	37
Symptoms at onset	Muscle pain and muscle stiffness	Muscle pain and muscle stiffness
Years of subjective weakness	5	7
Clinical myotonia	Absent	Absent
Myotonia on electromyography	Present and widespread	Absent
Cataracts	Absent	Absent
Myalgia	Present and widespread	Present and widespread
Serum creatine kinase, units/liter (normal 35–210)	411	60
Serum gamma glutamyl transferase, units/liter (normal 10–75)	76	Not tested
Other	Cholecystectomy at age 39 years	Sensorineural hearing loss, excessive sweating, tremor of hands