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Muscle tear

Justin L Hodgins, David P Trofa, Steve Donohue, Mark Littlefield, Michael Schuk, Christopher S Ahmad
BACKGROUND: Despite evidence highlighting the importance of the forearm flexor muscles of elite baseball players, no studies have reported on the epidemiology of flexor strains and their associated outcomes. PURPOSE: To examine the incidence, associated injuries, and outcomes associated with forearm flexor injuries among major and minor league baseball players. STUDY DESIGN: Cohort study; Level of evidence, 3. METHODS: Injury data attributed to forearm flexor injuries among Major League Baseball (MLB) and minor league teams between 2010 and 2014 were obtained from the professional baseball Health and Injury Tracking System...
June 1, 2018: American Journal of Sports Medicine
Joanna Majewska, Katarzyna Zajkiewicz, Kamila Wacław-Abdul, Joanna Baran, Daniel Szymczyk
Introduction: The aim of this study was to evaluate and compare the level of neuromotor function and somatic development in 6- and 7-year-old children born before the 30th week gestation with that in full-term children at the same age, as well as the correlation between prematurity and motor development. Material and Methods: The study group consisted of prematurely born 40 children. Their mean gestational age at birth was 27.8 ± 1.6 weeks (range 24-30 weeks). The control group consisted of 40 healthy children born with normal birth weight (>2500 g)...
2018: BioMed Research International
Yu Sasaki, Nobuyasu Ochiai, Arata Nakajima, Takahisa Sasho, Tomonori Kenmoku, Takeshi Yamaguchi, Takehiro Kijima, Eiko Hashimoto, Yasuhito Sasaki, Seiji Ohtori
BACKGROUND: Rotator cuff tears are the most common shoulder injury, and little is known about the underlying etiology of fatty infiltration after rotator cuff tear. Previous studies speculated that rotator cuff tears lead to neural injury due to tethering of the suprascapular nerve at the notch. This study aimed to evaluate fatty infiltration after suprascapular nerve injury and rotator cuff tears. METHODS: Ninety adult male Sprague-Dawley rats were used and were divided into four groups: sham, tendon transection only, suprascapular nerve ligation, and tendon transection plus suprascapular nerve ligation...
June 5, 2018: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
Ashley J Porter, Rylan Hayes, Lawrence Lee, Stephen O'Hagan
A 35-year-old man presented after a high-speed motor vehicle accident and the driver's side curtain air bag causing blunt force trauma rupturing his right globe. The tangential force of the air bag resulted in an unusual arcuate horseshoe-shaped rupture through the lateral rectus insertion, causing avulsion of the muscle and tearing the sclera, with the apices of the tear extending anteriorly towards the limbus. Repair of the globe rupture was undertaken, and secondary vitrectomy revealed that the scleral tear had not involved the retina abutting the ora serrata...
June 4, 2018: BMJ Case Reports
Brian Lee, Euan Stubbs
We present an unusual case of sartorius muscle tear presenting as acute meralgia paresthetica. A healthy 67-year old male was referred to our department with a one-week history of pain, numbness and bruising over his hip and anterolateral thigh. Extended ultrasound assessment revealed an intramuscular tear of sartorius, with acute hematoma surrounding the adjacent lateral femoral cutaneous nerve. Meralgia paresthetica from acute trauma is rare, with only three published cases relating to fractures of the anterior superior iliac spine...
May 29, 2018: Clinical Imaging
Ioannis Tsifountoudis, Ioannis Kalaitzoglou, Emmanuel Papacostas, Nikos Malliaropoulos
We report a case of a symptomatic tensor fasciae suralis (TFS) muscle in an elite jumper, with a very rare tear in its origin. The TFS muscle must be recognized and differentiated from other pathologic entities in the popliteal region. The magnetic resonance imaging (MRI) and ultrasound (US) can reliably identify this variant and its pathology.
July 6, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
Mark A Anderson, F Joseph Simeone, William E Palmer, Connie Y Chang
OBJECTIVE: To correlate MRI findings of patients with posterior cruciate ligament (PCL) injury and surgical management. MATERIALS AND METHODS: A retrospective search yielded 79 acute PCL injuries (36 ± 16 years old, 21 F, 58 M). Two independent readers graded PCL tear location (proximal, middle, or distal third) and severity (low-grade or high-grade partial/complete) and evaluated injury of other knee structures. When available, operative reports were examined and the performed surgical procedure was compared with injury grade, location, and presence of associated injuries...
June 1, 2018: Skeletal Radiology
Mirco Sgroi, Thomas Loitsch, Heiko Reichel, Thomas Kappe
PURPOSE: The purpose of this study was to analyze the diagnostic value of 7 clinical tests for the diagnosis of supraspinatus tendon tears, to investigate the ability of these tests to distinguish between partial- and full-thickness tears, and to compare 3 different ways of interpreting positive test results (weakness and pain): (1) in case of pain, (2) in case of weakness, regardless if with pain or not, and (3) when any of the 2 symptoms occurs, regardless if in combination or not. Moreover, this study aimed to investigate whether a combination of tests can improve the diagnostic accuracy...
May 22, 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
Mohammad Samim, Pamela Walsh, Soterios Gyftopoulos, Robert Meislin, Luis S Beltran
OBJECTIVE: The aim of this article is to review the postoperative MRI appearances of irreparable massive rotator cuff tears (RCTs) after surgery was performed using newer techniques, including patch repair, muscle tendon transfer, superior capsular reconstruction, and subacromial balloon implantation. CONCLUSION: Newer surgical techniques are emerging for the management of massive RCTs. As radiologists become increasingly likely to encounter postoperative imaging studies of RCTs repaired using these techniques, familiarity with the normal postoperative appearances and complications associated with these techniques becomes important...
May 24, 2018: AJR. American Journal of Roentgenology
Ji-Yong Gwark, Chang-Meen Sung, Jae-Boem Na, Hyung Bin Park
PURPOSE: To compare the structural and clinical outcomes after arthroscopic rotator cuff repair (ARCR) of a case group aged 70 and above with those of a control group younger than 70, with the 2 groups matched for sex and tear size. METHODS: The case group, comprising 53 patients 70 or older, and the control group, comprising 159 patients younger than 70, all received ARCR to 1 shoulder with symptomatic full-thickness rotator cuff tear. The case and the control subjects, who were matched for sex and tear size to minimize bias related to tendon healing, received ARCR during the same period...
May 19, 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
Ji-Hyun Lee, Giwoong Hong
Clarification is needed regarding the definitions and classification of groove and hollowness of the infraorbital region depending on the cause, anatomical characteristics, and appearance. Grooves in the infraorbital region can be classified as nasojugal grooves (or folds), tear trough deformities, and palpebromalar grooves; these can be differentiated based on anatomical characteristics. They are caused by the herniation of intraorbital fat, atrophy of the skin and subcutaneous fat, contraction of the orbital part of the orbicularis oculi muscle or squinting, and malar bone resorption...
May 2018: Archives of Plastic Surgery
Anthony M Kordahi, Kara L Sarrel, Sameer B Shah, Eric Y Chang
Anatomical variants of muscle are commonly encountered by surgeons and radiologists. The flexor carpi radialis brevis (FCRB) is an anomalous muscle in the distal forearm with an estimated prevalence of 2-8%. In the literature, there are a few case reports of symptomatic FCRB tenosynovitis without a concomitant tear, and treatment methods described include both conservative and surgical management. We present a case of one patient with radial sided wrist pain and a partial FCRB tear, which to our knowledge is the first case report of a symptomatic FCRB tear...
May 18, 2018: Skeletal Radiology
C Kevin Park, Vinko Zlomislic, Jiang Du, Brady K Huang, Eric Y Chang, Douglas G Chang
This report describes a severe injury to the proximal rectus femoris (RF) muscle in a 37-year-old recreational athlete. This injury is a relatively rare occurrence in both the general and elite athletic populations. Acute and long-term imaging and functional outcomes are described. This athlete was able to return to full activity without surgical intervention. Follow-up imaging demonstrated gross healing of both complete (or near complete) muscle and tendon tears. LEVEL OF EVIDENCE: ▪▪▪...
May 31, 2018: PM & R: the Journal of Injury, Function, and Rehabilitation
Ana P Valencia, Jim K Lai, Shama R Iyer, Katherine L Mistretta, Espen E Spangenburg, Derik L Davis, Richard M Lovering, Mohit N Gilotra
BACKGROUND: Massive rotator cuff tears (RCTs) begin as primary tendon injuries and cause a myriad of changes in the muscle, including atrophy, fatty infiltration (FI), and fibrosis. However, it is unclear which changes are most closely associated with muscle function. PURPOSE: To determine if FI of the supraspinatus muscle after acute RCT relates to short-term changes in muscle function. STUDY DESIGN: Controlled laboratory study. METHODS: Unilateral RCTs were induced in female rabbits via tenotomy of the supraspinatus and infraspinatus...
May 1, 2018: American Journal of Sports Medicine
Felix Dyrna, Neil S Kumar, Elifho Obopilwe, Bastian Scheiderer, Brendan Comer, Michael Nowak, Anthony A Romeo, Augustus D Mazzocca, Knut Beitzel
BACKGROUND: Previous biomechanical studies regarding deltoid function during glenohumeral abduction have primarily used static testing protocols. HYPOTHESES: (1) Deltoid forces required for scapular plane abduction increase as simulated rotator cuff tears become larger, and (2) maximal abduction decreases despite increased deltoid forces. STUDY DESIGN: Controlled laboratory study. METHODS: Twelve fresh-frozen cadaveric shoulders with a mean age of 67 years (range, 64-74 years) were used...
May 1, 2018: American Journal of Sports Medicine
Paige V Tracy, Shreya Wadhwani, Jourdan Triebwasser, Alan S Wineman, Francisco J Orejuela, Susan M Ramin, John O DeLancey, James A Ashton-Miller
The pubovisceral muscles (PVM) help form the distal maternal birth canal. It is not known why 13% of vaginal deliveries end in PVM tears, so insights are needed to better prevent them because their sequelae can lead to pelvic organ prolapse later in life. In this paper we provide the first quantification of the variation in in vivo viscoelastic properties of the intact distal birth canal in healthy nulliparous women using Fung's Quasilinear Viscoelastic Theory and a secondary analysis of data from a clinical trial of constant force birth canal dilation to 8 cm diameter in the first stage of labor in 26 nullipara...
June 6, 2018: Journal of Biomechanics
Debora Lana, Luigi Tarallo, Fabio Catani
Injuries of the triceps brachii muscle are a rare entity and mostly concern its distal tendon. These represent the least common of all muscle and tendons injuries. The most common reported causes are repeated strong physical efforts, a fall on an outstretched forearm when a sudden deceleration is put on contract triceps, or a direct trauma. High-dosed and prolonged corticosteroid therapies, repeated local steroid injections, chronic renal failure, diabetes, rheumatoid arthritis, hyperparathyroidism, and osteogenesis imperfecta are reported as systemic causes...
April 2018: Journal of Hand and Microsurgery
N F Davis, E M Cunnane, R O 'c Mooney, J Hess, M T Walsh
Data on urethral catheter related injuries is sparse. In this study we aimed to characterise urethral diametric strain and urinary catheter inflation pressure thresholds that precede human urethral trauma during urethral catheterisation (UC). Human urethras were obtained from patients undergoing male to female gender reassignment surgery [(n = 9; age 40 ± 13.13 (range: 18-58)) years]. 12Fr urinary catheters were secured in the bulbar urethra and the catheter's anchoring balloon was inflated with a syringe pump apparatus...
April 19, 2018: Journal of the Mechanical Behavior of Biomedical Materials
Kwanwoo Kim, Hyun-Jung Hwang, Seul-Gi Kim, Jin-Hyuck Lee, Woong Kyo Jeong
BACKGROUND: Quantitative assessment of rotator cuff muscle activity is important in the treatment of shoulder disorders. However, the known methods for assessing rotator cuff muscle activity thus far have been inaccurate, invasive, and inconvenient. QUESTIONS/PURPOSES: (1) Does the activity of the deltoid, supraspinatus, and infraspinatus muscles measured using ultrasound shear wave elastography have a linear correlation with muscle activity assessed using generally used methods, including isokinetic dynamometry and electromyography? (2) Does the activity of the deltoid, supraspinatus, and infraspinatus muscles measured using shear wave elastography show good intraobserver and interobserver reliability? METHODS: Twelve volunteers participated in intrasession reliability experiments...
June 2018: Clinical Orthopaedics and related Research
Yoshiaki Itoigawa, Yuichiro Maruyama, Takayuki Kawasaki, Tomoki Wada, Keiichi Yoshida, Kai-Nan An, Kazuo Kaneko
PURPOSE: To determine the feasibility of shear wave elastography (SWE) with B-mode ultrasound in predicting the stiffness of the rotator cuff muscle before arthroscopic rotator cuff repair to evaluate the difficulty of the surgical procedure, as well as to compare SWE with the Goutallier stage on magnetic resonance imaging (MRI). METHODS: Thirty-eight patients with a full-thickness supraspinatus tear requiring arthroscopic rotator cuff repair participated. The Goutallier stage of fatty infiltration on MRI was measured before surgery, as was the SWE modulus of the anterior superficial, anterior deep, posterior superficial, and posterior deep (PD) regions of the supraspinatus muscle...
April 20, 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
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