Fibrotic contracture of the canine infraspinatus muscle

Summary

Fibrotic contracture of the canine infraspinatus muscle (FCIM) is considered a rare musculotendineous disorder mainly affecting hunting dogs. After an acute onset of a painful non-weight bearing lameness, the initial pain and lameness improve over a period of one to four weeks, after which a characteristic circumducted gait abnormality develops in the forelimb. The initial injury to the infraspinatus muscle is not fully recognized or correctly interpreted in most cases, at least not with regard to its potential as a precursor of myopathy and FCIM. A mixed breed hunting dog developed an acute and extremely painful swelling of the infraspinatus muscle. The injury was easily recognized during clinical examination. The clinical signs were interpreted as an osteo-fascial compartment syndrome (OFCS) of the infraspinatus muscle. Immediate surgical decompression of the osteo-fascial compartment to prevent development of FCIM was undertaken. The histopathological and immunohistochemical examinations of the injured infrapinatus muscle revealed tissue changes that indicated acute muscle rupture, without any signs of an initiating degenerative process. On the day following surgery the dog was fully weight bearing. Restriction of activity for four weeks was recommended. Eight months after the initial injury, the dog had completely recovered and had full days of vigorous exercise and hunting activity without any apparent lameness. The findings in this case suggested that the infraspinatus muscle may be considered to be an osteo-fascial compartment in dogs and must be added to the list of compartments that may pose a potential risk for OFCS in the canine extremity.

Keywords

Canine - compartment syndrome - infraspinatus muscle

• References

• 1 Meutstege FJ. Contractuur van dem. infraspinatus als oorzaak van boegkreupelheid bij een hond (Contracture of the m. infraspinatus as a cause of shoulder lameness in a dog.) Tijdschr Dierge-neeskd 1970; 95: 24-6.
• 2 Bennett RA. Contracture of the infraspinatus muscle in dogs: a review of 12 cases. J Am Anim Hosp Assoc 1986; 22: 481-7.
• 3 Carberry CA, Gilmore DR. Infraspinatus muscle contracture associated with trauma in a dog. J Am VetMed Assoc 1986; 188: 533-4.
• 4 Kramer M, Schimke E, Schachenmayr W. et al. Diagnostik und Therapie ausgewählter Sehnen- und Muskelerkrankungen beim Hund. Kleintier-prax 1996; 41: 889-96.
• 5 Dillon EA, Anderson LJ, Jones BR. Infraspinatus muscle contracture in a working dog. NZ Vet J 1989; 37: 32-4.
• 6 Pettit GD, Chatburn CC, Hegreberg GA. et al. Studies on the pathophysiology of infraspinatus muscle contracture in the dog. Vet Surg 1978; 7: 8-11.
• 7 Gustafson L, Hofstedt L. Infraspinatuskontraktur hos hund (Infraspinatus contracture in the dog). SvenVetTidn 1984; 36: 819-22.
• 8 Montgomery RD, Fitch RB. Muscle and tendon disorders. In: Textbook of Small Animal Surgery. Slatter D. (ed) Philadelphia: Saunders; 2003: 2264-72.
• 9 Jubileumsbok for Norske Elghundklubbers Forbund 1899-1999. (Anniversarybook, Norwegian elkhound Club Association 1899-1999). Pettersen KP. (ed) Oslo: 2000
• 10 Lieber RL, Fridén J. Mechanisms ofmuscle injury gleaned from animal models. Am J Phys Med Rehabil 2002; 81: 70-9.
• 11 Fridén J, Lieber RL. Segmental muscle fiber lesion after repetitive eccentric contractions. Cell Tissue Res 1998; 293: 165-71.
• 12 Lieber RL, Woodburn TM, Fridén J. Muscle damage induced by eccentric contractions of 25% strain. J Appl Physiol 1991; 70: 2498-507.
• 13 Fitch RB, Jaffe MH, Montgomery RD. Muscle injuries in dogs. Compend Contin Educ Pract Vet 1997; 19: 947-57.
• 14 Darling R, Buckley C, Abbott W. et al. Intermittent claudication in young athletes : popliteal artery en-trapmentsyndrome. J Trauma 1974; 14: 543-52.
• 15 Milton JL, Henderson RA. Surgery of muscles and tendons. In: Current Techniques in Small Animal Surgery. Bojrab MJ. (ed) Philadelphia: Lea & Febiger; 1983: 495-516.
• 16 American Medical Association, Subcommittee on Classification of Sports Injuries. Standard Nomenclature of Athletic Injuries. Chicago: 1966
• 17 Garrett WE, Rich PK, Nikolaou B. et al. Computed tomography of hamstrings muscle strains. Med Sci Sports Exerc 1989; 21: 506-14.
• 18 Glick JM. Muscle strains. Prevention and treatment. Phys Sportsmed 1989; 8: 73-7.
• 19 Ryan A. Quadriceps strain, rupture and charlie horse. Med Sci Sports 1969; 1: 106-11.
• 20 Johnson JA, Austin C, Breur GJ. Incidence of canine appendicularmusculoskeletal disorder in 16 veterinary teaching hospitals from 1980 through 1989. Vet Comp Orthop Traumatol 1994; 7: 56-69.
• 21 de Haan JJ, Beale BS. Compartment syndrome in the dog: case report and literature review. J Am Anim Hosp Assoc 1993; 29: 134-40.
• 22 Basinger PR, Aron DN, Crowe DT. et al. Osteofascial compartment syndrome in the dog. Vet Surg 1987; 16: 427-34.
• 23 Rorabeck CH, Bourne R, Fowler P. et al. The role of tissue pressure measurement in diagnosing chronic anterior compartment syndrome. Am J Sports Med 1988; 16: 143-6.
• 24 Arciero R, Shishido N, Parr T. Acute anterolateral compartment syndrome secondary to rupture of the peroneus longus muscle. Am J Sports Med 1984; 12: 366-7.
• 25 Olivieri M. Compartment syndrome of the front leg of a dog due to rupture of the median artery. J Am Anim Hosp Assoc 1978; 14: 210-8.
• 26 Sheridan GW, Matsen FA. Fasciotomy in the treatment of the acute compartment syndrome. J Bone Joint Surg Am 1976; 58: 112-5.
• 27 Tischer A, Brunnberg L. Kompartmentsyndrom beim Hund?. Kleintierprax 1998; 43: 175-84.
• 28 Williams J, Bailey MQ, Schertel ER. et al. Compartment syndrome in a Labrador retriever. Vet Radiol Ultrasound 1992; 33: 244-8.
• 29 Matava MJ, Whitesides TE, Seiler JG. et al. Determination of the compartment pressure threshold of muscle in a canine model. J Trauma 1994; 37: 50-8.
• 30 Steiberg BD, Gelberman RH. Evaluation oflimb compartment with suspected increased interstitial pressure. A non-invasive method for determining quantitative hardness. Clin Orthop 1994; 300: 248-53.
• 31 Heckman MM, Whitesides TE, Grewe SR. et al. Histologic determination of the ischemic threshold of muscle in the canine compartment syndrome model. J Orthop Trauma 1993; 7: 199-210.
• 32 Better OS, Zinman C, Reis DN. et al. Hypertonic mannitol ameliorates intracompartmental tamponade in model compartment syndrome in the dog. Nephron 1991; 58: 344-6.
• 33 Ricci MA, Corbisiero RM, Mohamed F. et al. Replication of the compartment syndrome in a canine model: experimental evaluation of treatment. JInvestSurg 1990; 3: 129-40.
• 34 Rorabeck CH. A practical approach to compartmental syndromes-part III. Am Acad Orthop Surg. Instr Course Lect 1983; 32: 102-13.
• 35 Scholander PF, Hargens AR, Miller SL. Negative pressure in the interstitial fluid in animals. Science 1968; 161: 321-8.
• 36 Whitesides TE, Haney TC, Harada H. et al. A simple method for tissue pressure determination. Arch Surg 1975; 110: 1311-3.
• 37 McDermott A, Marble A, Yabsley RH. et al. Monitoring dynamic anterior compartment pressures during exercise: a new technique using the STIC catheter. Am J Sports Med 1982; 10: 83-9.