Conversion to reverse shoulder arthroplasty fifty-one years after shoulder arthrodesis: A case report

Table 1 Patient timeline

Timeline	Patient situation
1967	Posttraumatic posterior instability both shoulders; underwent arthrodesis right shoulder
2017	Underwent reverse shoulder arthroplasty left shoulder
Mai 2018	Conversion of arthrodesis to reverse shoulder arthroplasty right shoulder
Mai 2019	At twelve months follow-up; complete disappearance of his peri scapular pain and improvements in activities of daily living

Table 2 Outcomes of previous studies with patients who underwent conversion of arthrodesis to reversed shoulder arthrodesis

	Toney et al[5]	Alta et al[6]
Patient characteristics	Female, 41 yr	Female, 63 yr	Male, 46 yr	Female 66, yr	Male, 58 yr
Arthrodesis indication	Brachial plexus injury with recurrent instability	Post-traumatic arthritis	Glenohumeral arthritis	Failed surgeries for proximal humeral fracture	Failed surgeries for proximal humeral fracture
Years after arthrodesis	5	11	5	6	11
Preoperative EMG	Deltoid intact	2/3 deltoid intact	2/3 deltoid intact	Deltoid intact	2/3 deltoid intact
Follow-up (mo)	12	36	6	48	22
Preoperative/postoperative
Forward elevation	60/160	60/70	70/110	50/90	40/40
External rotation	0/60	0/15	0/20	0/15	0/10
Internal rotation	Trochanter/Th12	Trochanter/L5	Trochanter/L5	Trochanter/L5	Trochanter/sacrum
VAS pain scores	6	2	0	4	1

EMG: Electromyography; VAS: Visual analogue scale.