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Yu XK, Cao JX, Li L, Guo WB, Zhang L, Li JX. The correlation between types of posterior upper rotator cuff tears and intramuscular fat infiltration based on magnetic resonance imaging: A retrospective observational study. Front Bioeng Biotechnol 2022; 10:859174. [PMID: 36082165 PMCID: PMC9445121 DOI: 10.3389/fbioe.2022.859174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 07/12/2022] [Indexed: 11/13/2022] Open
Abstract
Objective: This study investigated the correlation between types of posterior upper rotator cuff tears (RCTs) and intramuscular fat infiltration (FI) in magnetic resonance imaging (MRI). Methods: The shoulder joints of 50 adults with a full-thickness posterior upper RCT diagnosed by MRI, from January 2019 to December 2021, were retrospectively analyzed. The patients were divided into three groups according to tear type: 1) an L-shaped tear group; 2) a crescent/U-shaped tear group; 3) a complete tear group. The correlation among age, gender, tear range, trauma history, and the duration of clinical symptoms was analyzed. The MRI images were used by two musculoskeletal imaging physicians to evaluate the type and range of tears, the Goutallier grade of the supraspinatus and infraspinatus, and the correlations and reliability were analyzed. Results: Differences in the tear range (p < 0.001) and the Goutallier grade of the infraspinatus muscle (p = 0.036) among the L-shaped, crescent/U-shaped, and complete tear groups were statistically significant; however, differences in the Goutallier grade of the supraspinatus muscle was not statistically significant (p = 0.356). In the crescent/U-shaped tear group, age was significantly correlated with the Goutallier grade of the supraspinatus muscle (RS = 0.720, p = 0.029) and the infraspinatus muscle (RS = 0.713, p = 0.032). In the complete tear group, tear range was significantly correlated with the Goutallier grade of the supraspinatus muscle (RS = 0.801, p = 0.001) and the infraspinatus muscle (RS = 0.802, p = 0.001). The Goutallier grades of the supraspinatus muscle (kappa, 0.489) and the infraspinatus muscle (kappa, 0.424) presented with interobserver consistency. Conclusion: The type of posterior upper RCT correlates with the degree of FI. There is a positive correlation between the FI of crescent/U-shaped full-thickness RCTs and age. Additionally, the range of complete tears in the posterior upper RC has a positive correlation with FI.
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Duijn EAHD, Roy van S, Karel YHJM, Provyn S, Pouliart N. An interexaminer agreement and reliability study on cadavers with musculoskeletal ultrasound of the shoulder performed by physiotherapists and radiologists compared with dissection. Musculoskelet Sci Pract 2022; 60:102569. [PMID: 35533597 DOI: 10.1016/j.msksp.2022.102569] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 04/20/2022] [Accepted: 04/24/2022] [Indexed: 11/26/2022]
Abstract
STUDY DESIGN A cross-sectional inter-examiner agreement and reliability study on fresh frozen cadaver shoulders. BACKGROUND Musculoskeletal ultrasound (MSU) is frequently used by physical therapists and radiologists to improve specific diagnosis in rotator cuff related pathology. The evaluation of the rotator cable seems to be important as stabilizing structure when cuff tears occur. OBJECTIVES To evaluate the inter-examiner agreement and reliability of MSU of the shoulder to detect rotator cuff-pathology and the involvement of the rotator cable in comparison to "dissection". METHODS Physical therapists, a radiologist and an orthopedic surgeon (dissection) investigated 40 fresh frozen cadaver shoulders in order to detect shoulder pathology including rotator cable involvement. Examiners were blinded to each other's findings. RESULTS We found a strong and significant agreement between the raters: PTs, the radiologist and the dissector in this cadaver study for all rotator cuff, the long head of the biceps pathologies and in detecting abnormalities of the rotator cable. The kappa value was substantial to (almost) perfect agreement for all diagnostic outcome categories. CONCLUSIONS This study shows that among a limited group of physical therapists, one radiologist and a dissector a strong level of agreement with kappa values from substantial to (almost) perfect in finding subacromial pathology.
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Affiliation(s)
- E A H D Duijn
- Basic (bio) Medical Sciences (BMWE), Vrije Universiteit Brussel, Brussels, Belgium.
| | - S Roy van
- Vrije Universiteit van Brussel, Brussels, Belgium
| | - Y H J M Karel
- Research Group Life in Motion, Avans University of Applied Sciences, Breda, the Netherlands
| | - S Provyn
- Basic (bio) Medical Sciences (BMWE), Vrije Universiteit Brussel, Brussels, Belgium; Anatomical Research and Clinical Studies (ARCS) Vrije Universiteit Brussel, Brussels, Belgium
| | - N Pouliart
- Basic (bio) Medical Sciences (BMWE), Vrije Universiteit Brussel, Brussels, Belgium; Department of Orthopaedics and Traumatology, Universitair Ziekenhuis Brussel (UZ Brussel) Brussels, Belgium
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Babaei-Ghazani A, Boudier-Revéret M, Michaud J. Zebras in the Shoulder: a Review Article on Advanced Diagnostic Ultrasound of the Shoulder. CURRENT PHYSICAL MEDICINE AND REHABILITATION REPORTS 2021. [DOI: 10.1007/s40141-021-00331-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Zielinska N, Duparc F, Polguj M, Borowski A, Olewnik Ł. A proposal for a new classification of the Coracobrachialis longus: A rare case or a new, distinct muscle? Ann Anat 2021; 239:151825. [PMID: 34481938 DOI: 10.1016/j.aanat.2021.151825] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 08/17/2021] [Accepted: 08/23/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND The coracobrachialis muscle, along with the brachialis and biceps brachii muscles, belong to the anterior group of the brachial region. It is characterized by high level of morphological variabilities, with a common variation being the coracobrachialis longus (CBL) muscle. The CBL may be recognized as a distal part of the coracobrachialis muscle, originating from the anteromedial surface of the humerus, however, the two muscles are distinct from each other, and the distal attachment of the CBL is longer and located closer to the elbow joint. The CBL muscle may also be inserted on to various structures. The aim of the present study was to determine the frequency of the CBL muscle among a studied population, and to prepare a classification based on its morphological features. MATERIAL AND METHODS Classical anatomical dissection was performed on 100 upper limbs from fifty human cadavers (30 female and 20 male) fixed in 10% formalin solution. RESULTS The coracobrachialis muscle was found in all individuals, and the CBL muscle was present in 11%, i.e. 11 upper limbs: four women, and seven men; five left and six right. Significantly, in all cadavers in which the coracobrachialis longus was found, its presence was unilateral (five left and six right). A new classification of the CBL can be proposed based on its insertion: Type I characterized by a distal attachment located on the medial epicondyle (73% of all cases of the CBL) and Type II by an insertion into the olecranon (27% of all cases of the CBL). CONCLUSION The CBL muscle is morphologically variable. More studies focused on the course of this muscle among various populations are needed. Nevertheless, our findings indicate that the CBL muscle could be classified as a distinct muscle.
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Affiliation(s)
- Nicol Zielinska
- Department of Anatomical Dissection and Donation, Medical University of Lodz, Poland
| | - Fabrice Duparc
- Laboratory of Anatomy, Faculty of Medicine, Rouen University, France
| | - Michał Polguj
- Department of Normal and Clinical Anatomy, Medical University of Lodz, Poland
| | - Andrzej Borowski
- Orthopaedics and Pediatric Orthopaedics Department, Medical University of Lodz, Poland
| | - Łukasz Olewnik
- Department of Anatomical Dissection and Donation, Medical University of Lodz, Poland
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Zink TR, Schmidt CC, Papadopoulos DV, Blake RJ, Smolinski MP, Davidson AJ, Spicer CS, Miller MC, Smolinski PJ. Locating the rotator cable during subacromial arthroscopy: bursal- and articular-sided anatomy. J Shoulder Elbow Surg 2021; 30:S57-S65. [PMID: 33878486 DOI: 10.1016/j.jse.2021.03.148] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 03/21/2021] [Accepted: 03/28/2021] [Indexed: 02/01/2023]
Abstract
BACKGROUND The rotator cable (RCa) is an important articular-sided structure of the cuff capsular complex that helps prevent suture pull out during rotator cuff repairs (RCRs) and plays a role in force transmission. Yet, the RCa cannot be located during bursal-sided RCRs. The purpose of this study is to develop a method to locate the RCa in the subacromial space and compare its bursal- and articular-sided dimensions. METHODS In 20 fresh-frozen cadaveric specimens, the RCa was found from the articular side, outlined with stitches, and then evaluated from the bursal side using an easily identifiable reference point, the intersection of a line bisecting the supraspinatus (SS) tendon and posterior SS myotendinous junction (MTJ). Four bursal-sided lengths were measured on the SS-bisecting line as well as the RCa's outside anteroposterior base. For the articular-sided measurements, the rotator cuff capsular complex was detached from bone and optically scanned creating 3D solid models. Using the 3D models, 4 articular-sided lengths were made, including the RCa's inside and outside anteroposterior base. RESULTS The RCa's medial arch was located 9.9 ± 5.6 mm from the reference point in 10 intact specimens and 4.1 ± 2.4 mm in 10 torn specimens (P = .007). The RCa's width was 10.9 ± 2.1 mm, and the distance from the lateral edge of the RCa to the lateral SS insertion was 13.9 ± 4.8 mm. The bursal- and articular-sided outside anteroposterior base measured 48.1 ± 6.4 mm and 49.6 ± 6.5 mm, respectively (P = .268). The average inside anteroposterior base measurement was 37.3 ± 5.9 mm. DISCUSSION The medial arch of the RCa can be reliably located during subacromial arthroscopy using the reference point, analogous to the posterior SS MTJ. The RCa is located 10 mm in intact and 4 mm in torn tendons (P = .007) from the posterior SS MTJ. If the above 6-mm shift in location of the RCa is not taken into consideration during rotator cuff suture placement, it could negatively affect time zero repair strength. The inside anteroposterior base of the RCa measures on average 37 mm; therefore, rotator cuff tears measuring >37 mm are at risk of rupturing part or all of the RCa's 2 humeral attachments, which if not recognized and addressed could impact postoperative function.
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Affiliation(s)
- Thomas R Zink
- Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA; Shoulder and Elbow Research Laboratory, Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Christopher C Schmidt
- Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA; Shoulder and Elbow Research Laboratory, Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA; Department of Mechanical Engineering and Material Science, University of Pittsburgh, Pittsburgh, PA, USA.
| | - Dimitrios V Papadopoulos
- Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA; Shoulder and Elbow Research Laboratory, Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Ryan J Blake
- Shoulder and Elbow Research Laboratory, Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA; Department of Mechanical Engineering and Material Science, University of Pittsburgh, Pittsburgh, PA, USA
| | - Michael P Smolinski
- Shoulder and Elbow Research Laboratory, Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA; Department of Mechanical Engineering and Material Science, University of Pittsburgh, Pittsburgh, PA, USA
| | - Anthony J Davidson
- Shoulder and Elbow Research Laboratory, Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Christopher S Spicer
- Shoulder and Elbow Research Laboratory, Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA; Department of Mechanical Engineering and Material Science, University of Pittsburgh, Pittsburgh, PA, USA
| | - Mark C Miller
- Shoulder and Elbow Research Laboratory, Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA; Department of Mechanical Engineering and Material Science, University of Pittsburgh, Pittsburgh, PA, USA
| | - Patrick J Smolinski
- Shoulder and Elbow Research Laboratory, Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA; Department of Mechanical Engineering and Material Science, University of Pittsburgh, Pittsburgh, PA, USA
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A histoanatomical study of the fiber bundle forming the 'Comma Sign,' a critical marker of the torn edge of the subscapularis tendon. Arch Orthop Trauma Surg 2021; 141:1231-1239. [PMID: 33454805 DOI: 10.1007/s00402-021-03775-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 01/06/2021] [Indexed: 01/08/2023]
Abstract
INTRODUCTION The "Comma sign" is a well-known indicator of the subscapularis torn edge of the shoulder. We undertook a histoanatomical study of the fiber bundle forming Comma sign (FBCS) to determine why FBCS is maintained even in cuff tear cases. MATERIALS AND METHODS Part 1: five tissue blocks including the supraspinatus tendon (SSP), rotator interval (RI), and subscapularis tendon (SSC) out of 5 cuff-intact cadavers were histologically observed in serial sections. Part 2: another tissue blocks of 6 cuff-intact cadavers were serially sectioned along the estimated FBCS direction based on the Part 1 findings. Additionally, 5 tissue blocks of cuff-torn cadavers including the three components, SSP, FBCS, and SSC, were serially sectioned along the apparent FBCS. In one slice clearly demonstrating FBCS fibers out of each section series, the components were measured of the sound speed and visualized through a scanning acoustic microscope (SAM). RESULTS At the lateral portion, RI tissue with the joint capsule became thick and tightly surrounded SSP. Similarly, thicker RI tissue adhered to SSC from the superior and bursal side. More laterally, the borders of SSP/FBCS and FBCS/SSC were unclear with intermingled fibers. At the lateral most portion, RI tissue formed a fiber bundle, FBCS, extending from SSP to the bursal side of SSC. The sound speeds of SSP and SSC were significantly faster than FBCS in both cuff-intact and cuff-torn slices. In SAM images of cuff-torn specimens the FBCS borders were all unclear. CONCLUSIONS As FBCS extends from the capsule beneath SSP and to the bursal surface of SSC, the FBCS connection to SSP and SSC is hardly lost, even though SSP or SSC detaches from the greater or lesser tubercle, respectively. Additionally, as degeneration make the elasticity difference gradual, the stress concentration at the borders may be diminished, leading to less breakage of FBCS.
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Szewczyk B, Polguj M, Paulsen F, Podgórski M, Duparc F, Karauda P, Olewnik Ł. A proposal for a new classification of coracobrachialis muscle morphology. Surg Radiol Anat 2021; 43:679-688. [PMID: 33564931 PMCID: PMC8105249 DOI: 10.1007/s00276-021-02700-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 01/27/2021] [Indexed: 11/16/2022]
Abstract
INTRODUCTION The coracobrachialis muscle (CRM) originates from the apex of the coracoid process, in common with the short head of the biceps brachii muscle, and from the intermuscular septum. It inserts to the medial part of the humerus between the attachment of the medial head of the triceps brachii and the brachial muscle. Both the proximal and distal attachments of the CRM, as well as its relationship with the musculocutaneus nerve, demonstrate morphological variability. MATERIAL AND METHODS One hundred and one upper limbs (52 left, and 49 right) fixed in 10% formalin solution were examined. RESULTS Three main types, with subtypes, were identified. The most common was Type I (49.5), characterized by a single muscle belly with a classical origin from the coracoid process, medially and posteriorly to the tendon of the biceps brachii. Type II (42.6%), characterized by two heads, was divided into two subtypes (A-B) depending on its origin: Type IIA, where one head originated from the coracoid process posteriorly to the tendon of the biceps brachii and the second head from the short head of the biceps brachii, and Type IIB, in which both heads originated from the coracoid process; however, the superficial head fused with the insertion of a short head of the biceps brachii, while the deep head was directly originating. Finally, Type III (7.9%) was characterized by three heads: two originated from the coracoid process (superficial and deep), and the third from a short head of the biceps brachii. Two types of insertion and two types of musculocutaneous nerve (MCN) relative to CRM could be distinguished. CONCLUSION An adapted classification is needed for all clinicians working in this area, as well as for anatomists. The CRM demonstrates morphological variability in both its proximal and distal attachments, as well as the variable course of the MCN relative to the CRM. WHAT IS KNOWN ABOUT THIS SUBJECT "AND" WHAT THIS STUDY ADDS TO EXISTING KNOWLEDGE: Not much is known about the variability of coracobrachialis muscle. The present paper introduces a completely new classification, both clinical and anatomical.
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Affiliation(s)
- Bartłomiej Szewczyk
- Department of Anatomical Dissection and Donation, Medical University of Lodz, Lodz, Poland
| | - Michał Polguj
- Department of Normal and Clinical Anatomy, Chair of Anatomy and Histology, Medical University of Lodz, Lodz, Poland
| | - Friedrich Paulsen
- Institute of Functional and Clinical Anatomy, Erlangen, Germany
- Department of Topographic Anatomy and Operative Surgery, Sechenov University, Moscow, Russia
| | - Michał Podgórski
- Polish Mother’s Memorial Hospital Research Institute, Lodz, Poland
| | - Fabrice Duparc
- Laboratory of Anatomy, Faculty of Medicine, Rouen University, Mont-Saint-Aignan, France
| | - Piotr Karauda
- Department of Anatomical Dissection and Donation, Medical University of Lodz, Lodz, Poland
| | - Łukasz Olewnik
- Department of Anatomical Dissection and Donation, Medical University of Lodz, Lodz, Poland
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Fibrin Glue-Kartogenin Complex Promotes the Regeneration of the Tendon-Bone Interface in Rotator Cuff Injury. Stem Cells Int 2021; 2021:6640424. [PMID: 33854552 PMCID: PMC8019366 DOI: 10.1155/2021/6640424] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 03/02/2021] [Accepted: 03/06/2021] [Indexed: 01/08/2023] Open
Abstract
Objective Rotator cuff injury healing is problematic because the tendon-bone junction often forms cicatricial tissues, rather than fibrocartilage, which leads to mechanical impairment and is prone to redamage. Kartogenin (KGN) is a newly discovered small molecule compound which can induce cartilage formation through chondrogenesis of endogenous mesenchymal stem cells. Methods In this study, we used KGN with fibrin glue (FG) to repair the rotator cuff injury by promoting the formation of fibrocartilage at the tendon to bone interface. Firstly, we assessed the release rate of KGN from the FG-KGN complex and then created a rabbit rotator cuff tendon graft-bone tunnel model. The rabbits received saline, FG-KGN, or FG injections onto the tendon to bone interface after injury. Shoulder tissues were harvested at 6 and 12 weeks, and the sections were stained with HE and Safranin O/Fast green. The samples were assessed by histologic evaluation and biomechanical testing. Synovial mesenchymal stem cells derived from the synovial tissue around the rotator cuff were harvested for western blotting and qRT-PCR analysis. Results KGN was released rapidly from the FG-KGN complex during first 4 hrs and followed by a slow release until 7 days. The tendon graft-bone interface in the control (saline) group and the FG group was filled with scar tissue, rather than cartilage-like tissue, and only a small number of chondrocytes were found at the adjacent bone surface. In the FG-KGN group, the tendon to bone interface was fully integrated and populated by chondrocytes with proteoglycan deposition, indicating the formation of fibrocartilage-like tissues. At 12 weeks, the maximum tensile strength of the FG-KGN group was significantly higher than that of the FG and control groups (P < 0.01). The RNA expression levels of tendinous genes such as Tenascin C and the chondrogenic gene Sox-9 were substantially elevated in SMSCs treated with the FG-KGN complex compared to the other two groups. Conclusion These results indicated that fibrin glue is an effective carrier for KGN, allowing for the sustained release of KGN. The FG-KGN complex could effectively promote the regeneration and formation of fibrocartilage tissue of the tendon-bone interface in the rabbit rotator cuff tendon graft-bone tunnel model.
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Gleich J, Milz S, Ockert B. [Principles of tendon healing at the shoulder and consequences for their treatment : Importance of platelet-rich plasma and regenerative medicine]. Unfallchirurg 2020; 124:89-95. [PMID: 33346862 DOI: 10.1007/s00113-020-00941-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/03/2020] [Indexed: 11/30/2022]
Abstract
Tendon pathologies are a frequent cause of shoulder pain and can lead to significant decline in the quality of life. Conservative treatment is suitable for most tendon pathologies. In addition to classical conservative treatment options, such as physiotherapy, oral analgesia and infiltrations, there are a number of additive treatment options to promote structural tendon healing and clinical outcome. Furthermore, there are approaches to improve the results of the surgical treatment of tendon injuries by biological augmentation. The objective of this article is to give an overview of biological and regenerative therapeutic options in the treatment of tendon injuries of the shoulder. Therefore, the anatomical and molecular biological principles of the tendon structure and their importance for tendon healing are explained in order to highlight the various therapeutic options for daily practice. Biological augmentation procedures and regenerative medicine represent a promising therapeutic option for tendon injuries of the shoulder, however, the benefits are so far supported by little or no evidence at all.
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Affiliation(s)
- J Gleich
- Sektion Schulter- und Ellenbogenchirurgie, Klinik für Allgemeine, Unfall- und Wiederherstellungschirurgie, LMU Klinikum, Ludwig-Maximilians-Universität München, Nussbaumstr. 20, 80336, München, Deutschland.
| | - S Milz
- Anatomische Anstalt, Ludwig-Maximilians-Universität, München, Deutschland
| | - B Ockert
- Sektion Schulter- und Ellenbogenchirurgie, Klinik für Allgemeine, Unfall- und Wiederherstellungschirurgie, LMU Klinikum, Ludwig-Maximilians-Universität München, Nussbaumstr. 20, 80336, München, Deutschland
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10
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Olewnik Ł, Zielinska N, Karauda P, Duparc F, Georgiev GP, Polguj M. The co-occurrence of a four-headed coracobrachialis muscle, split coracoid process and tunnel for the median and musculocutaneous nerves: the potential clinical relevance of a very rare variation. Surg Radiol Anat 2020; 43:661-669. [PMID: 32979058 PMCID: PMC8105253 DOI: 10.1007/s00276-020-02580-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 09/15/2020] [Indexed: 11/12/2022]
Abstract
The coracobrachialis muscle (CBM) originates from the apex of the coracoid process, in common with the short head of the biceps brachii muscle, and from the intermuscular septum. Both the proximal and distal attachment of the CBM, as well as its relationship with the musculocutaneus nerve demonstrate morphological variability, some of which can lead to many diseases. The present case study presents a new description of a complex origin type (four-headed CBM), as well as the fusion of both the short biceps brachii head, brachialis muscle and medial head of the triceps brachii. In addition, the first and second heads formed a tunnel for the musculocutaneus and median nerves. This case report has clear clinical value due to the split mature of the coracoid process, and is a significant indicator of the development of interest in this overlooked muscle.
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Affiliation(s)
- Łukasz Olewnik
- Department of Anatomical Dissection and Donation, Medical University of Lodz, Lodz, Poland.
| | - Nicol Zielinska
- Department of Anatomical Dissection and Donation, Medical University of Lodz, Lodz, Poland
| | - Piotr Karauda
- Department of Anatomical Dissection and Donation, Medical University of Lodz, Lodz, Poland
| | - Fabrice Duparc
- Laboratory of Anatomy, Faculty of Medicine, Rouen University, Mont-Saint-Aignan, France
| | - Georgi P Georgiev
- Department of Orthopaedics and Traumatology, Medical University of Sofia, Sofia, Bulgaria
| | - Michał Polguj
- Department of Normal and Clinical Anatomy, Medical University of Lodz, Lodz, Poland
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11
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Zielinska N, Olewnik Ł, Karauda P, Tubbs RS, Polguj M. A very rare case of an accessory subscapularis muscle and its potential clinical significance. Surg Radiol Anat 2020; 43:19-25. [PMID: 32656573 PMCID: PMC7838069 DOI: 10.1007/s00276-020-02531-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 07/07/2020] [Indexed: 11/30/2022]
Abstract
The subscapularis muscle is the largest muscle of the rotator cuff and its main function is internal rotation. It is morphologically variable in both point of origin and insertion. The presence of an accessory subscapularis muscle can lead to brachial plexus neuropathy. This report presents a very rare accessory subscapularis muscle originating from two distinct bands on the subscapularis and teres major muscles. The insertion was divided among four tendons. The fourth tendon is bifurcated. One of these was connected to the tendon of the subscapularis muscle and the other three inserted into the base of the coracoid process of the scapula. This anomalous muscle has the potential to entrap the nerves of the posterior cord such as the axillary, lower subscapular, and thoracodorsal nerves.
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Affiliation(s)
- Nicol Zielinska
- Department of Anatomical Dissection and Donation, Medical University of Lodz, Lodz, Poland
| | - Łukasz Olewnik
- Department of Anatomical Dissection and Donation, Medical University of Lodz, Lodz, Poland.
| | - Piotr Karauda
- Department of Anatomical Dissection and Donation, Medical University of Lodz, Lodz, Poland
| | - R Shane Tubbs
- Department of Neurosurgery, Tulane University School of Medicine, New Orleans, LA, USA.,Department of Neurosurgery and Ochsner Neuroscience Institute, Ochsner Health System, New Orleans, LA, USA.,Department of Anatomical Sciences, St. George's University, Grenada, USA
| | - Michał Polguj
- Department of Normal and Clinical Anatomy, Medical University of Lodz, Lodz, Poland
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Abstract
The cause of rotator cuff tears is multifactorial with both intrinsic and extrinsic contributing factors. Understanding the normal MR anatomy of the rotator cuff and using an appropriate search pattern can help readers identify common pathologic conditions. Accurate designation using classification systems for tear thickness, size, and degree of retraction and muscle fatty infiltration and atrophy are important in guiding surgical management. Knowledge of common disease locations for the rotator cuff tendons can help focus reader searches and increase sensitivity.
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Affiliation(s)
- Erin McCrum
- Division of Musculoskeletal Imaging, Department of Radiology, Duke University Medical Center, Duke University, Box 3808, Durham, NC 27707, USA.
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Park H, Jung JY. Recent Issues in Musculoskeletal Anatomy Research and Correlation with MRI. JOURNAL OF THE KOREAN SOCIETY OF RADIOLOGY 2020; 81:2-20. [PMID: 36238117 PMCID: PMC9432098 DOI: 10.3348/jksr.2020.81.1.2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 12/18/2019] [Accepted: 01/07/2019] [Indexed: 11/16/2022]
Abstract
MRI 영상은 관절 내 질환의 평가에 중요한 검사기법이며, 관절 MRI 영상의 해석을 위해선 견고한 해부학적 지식이 바탕이 되어야 한다. 관절의 해부학 분야에서는, 새로운 구조물이 발견되기도 하며, 과거에 보고되었으나 기능을 알지 못하던 구조물이 새롭게 주목을 받기도 한다. 본 종설에서는 최근 십여 년간 활발하게 연구되어온 견관절 회전근개 케이블(rotator cable) 및 상관절막(superior capsule), 슬관절의 후외측(posterolateral corner) 및 전외측 인대 복합(anterolateral ligament complex), 발목관절의 원위부 경비골 인대결합(distal tibiofibular syndesmosis) 등의 최근 연구 결과를 소개하고, 이를 MRI 영상을 통해 확인해 보았다.
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Affiliation(s)
- Hyerim Park
- Department of Radiology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Joon-Yong Jung
- Department of Radiology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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