Partial-Thickness Rotator Cuff Tear by Itself Does Not Cause Shoulder Pain or Muscle Weakness in Baseball Players

Abstract

Background: Partial-thickness rotator cuff tears are common shoulder injuries in baseball players. For some tears, the symptoms can be relieved through physical therapy or debridement without rotator cuff repair. Purpose: To assess whether partial-thickness rotator cuff tear by itself causes shoulder pain and muscle weakness in baseball players. Study Design: Cross-sectional study; Level of evidence, 3. Methods: We studied 87 university baseball players (age, 19.5 ± 0.8 years; baseball career, 11.5 ± 1.6 years). All data were obtained during a full-participation annual medical check in 1 team. Rotator cuff tendons were examined ultrasonographically and allocated to 4 groups: (1) no tear, (2) supraspinatus tendon tear, (3) infraspinatus tendon tear, and (4) both supraspinatus and infraspinatus tendon tears. Current shoulder pain and shoulder muscle strength (dominant/nondominant) in abduction, external rotation, and internal rotation were compared by using chi-square and t tests. All players could play baseball with or without shoulder pain in this study. Results: Of the 87 players, 41 (47%) had articular-sided partial-thickness rotator cuff tears diagnosed on ultrasonography; the remaining 46 athletes were tear-free. Of the 41 affected patients, 19 had tears in the supraspinatus, 13 in the infraspinatus, and 9 in both the supraspinatus and infraspinatus tendons. Tear depth (mean ± SD) was 4.6 ± 2.3 mm in the supraspinatus and 6.2 ± 3.6 mm in the infraspinatus. Neither the rate of shoulder pain nor muscle strength differed significantly among the 4 groups ( P = .96 and P = .15-.70, respectively). Conclusion: Articular-sided partial-thickness rotator cuff tear—by itself—did not cause shoulder pain and muscle weakness in university baseball players. Most so-called articular-sided partial-thickness rotator cuff tears may not be pathologic tendon tears.

Patient outcomes and return to play after arthroscopic rotator cuff repair in overhead athletes: a systematic review

“…Among shoulder injuries, rotator cuff tears are common [3,4]. Rotator cuff injuries in overhead athletes may impair sport participation and lead to premature retirement [5][6][7]. The management of rotator cuff injuries in overhead athletes may be challenging [5,8,9].…”

Conservative treatment of partial-thickness rotator cuff tears and tendinopathy with platelet-rich plasma: a systematic review and meta-analysis

“…Rotator cuff tendinopathy, as an overuse disorder, 4 is the most common cause of shoulder pain, 5 which has been associated with an increased risk for rotator cuff tears. 6 Although PTRCs may cause minimal symptoms instantly, 7 concomitant pathologic physical condition such as scapula instability, dyskinesis, or tightness may cause pain and muscle weakness. 8 PTRCs and tendinopathy are initially treated conservatively 9 with sodium hyaluronate 10 and corticosteroid, 11 saline, lidocaine, and physiotherapy, 12 etc.…”

In Situ-Forming Fibrin Gel Encapsulation of MSC-Exosomes for Partial-Thickness Rotator Cuff Tears in a Rabbit Model

“…Partial-thickness rotator cuff tears (PTRCTs) have been estimated to affect 13% to 32% of the general population, and they are more common than full-thickness tears 1-3 . Not all PTRCTs result in symptoms 4 , but symptomatic patients often experience pain, limited range of motion, and symptoms of subacromial impingement 5 . On the basis of location, Ellman 6 classified PTRCTs into A (articular-side), B (bursal-side), and C (intratendinous) subtypes.…”