**7.2 Shoulder disorders**

Lately, Darrow et al. reported on patients treated for shoulder osteoarthritis or rotator cuff tears (*N* = 50), with either BMC or BMA injections. Patients were grouped in receiving one or two injections [122]. Outcome reports included resting pain, active pain, upper extremity functionality scale, and overall improvement percentage. Data were compared to baseline and between the two groups. All patients had significant posttreatment improvements in resting pain, active pain, and functionality scores, when compared to baseline values. Patients receiving two treatments, average interval duration of 22 days, experienced statistically significant more improvements in active pain than the patients receiving one injection. There were no significant outcome differences between patients with a rotator cuff tear or OA. Unfortunately, no information was provided on the BMA and BMC procedure, and no laboratory validation data were reported.
