Joint mice migration into the deep digital flexor tendon sheath in dogs

Summary

This study describes the appearance of ‘joint mice’ in the sheath of the deep digital flexor muscle tendon (DDFT) due to osteochondritis dissecans (OCD) lesions in the talocrural joint of 12 dogs. Surgical excision of all free fragments in the DDFT sheath was performed in five dogs, and their clinical progression was documented. The excision of free fragments from the DDFT sheath, but not arthro-tomy, proved clinically beneficial despite the presence of degenerative joint disease. The anatomical communication between the talocrural joint and the DDFT sheath and its dimensions are further illustrated with the use of contrast media and dissection of cadaver limbs.

Keywords

OCD - joint mice - deep digital flexor muscle - talocrural joint - dog

• References

• 1 Hermanson J, Evans H. The muscular system.. In: Miller’s Anatomy of the Dog. Evans H, ed. 3rd ed. Philadelphia: WB. Saunders Company; 1993: 370-371.
• 2 Freewein J. Muskulatur.. In: Anatomie von Hund und Katze. Freewein J, Vollmerhaus B, editor. Berlin: Blackwell Wissenschafts-Verlag; 1994: 125-127.
• 3 Fitch RB, Beale BS. Osteochondrosis of the canine tibiotarsal joint. Vet Clin North Am Small Anim Pract 1998; 28: 95-113.
• 4 Reinke J. Treatment of joint mice in the deep digital flexor tendon sheath.. In: Current Techniques in Small Animal Surgery. Bojrab M, editor. 4th ed. Maryland: Williams & Wilkins; 1998: 1260-1261.
• 5 Montavon PM, Dee JF, Weiss R. Distal tibial articular fractures in racing Greyhounds - a review of 6 cases. Vet Comp Orthop Traumatol 1993; 6: 146-152.
• 6 Balfour RJ, Boudrieau RJ, Gores BR. T-plate fixation of distal radial closing wedge osteotomies for treatment of angular limb deformities in 18 dogs. Vet Surg 2000; 29: 207-217.
• 7 Jaegger G, Marcellin-Little DJ, Levine D. Reliability of goniometry in Labrador Retrievers. Am J Vet Res 2002; 63: 979-986.
• 8 Miyabayashi T, Biller DS, Manley PA. et al. Use of a flexed dorsoplantar radiographic view of the talocrural joint to evaluate lameness in two dogs. J Am Vet Med Assoc 1991; 199: 598-600.
• 9 Piermattei D, Johnson K. An Atlas of Surgical Approaches to the Bones and Joints of the Dog and Cat.. 4th ed. Philadelphia: Saunders; 2004. .
• 10 Beale B, Goring R. Exposure of the medial and lateral trochlear ridges of the talus in the dog. Part I: Dorsomedial and plantaromedial approaches to the medial trochlear ridge. J Am Anim Hosp Assoc 1990; 26: 13-19.
• 11 Goring R, Beale B. Exposure of the medial and lateral trochlear ridges of the talus in the dog. Part II: Dorsolateral and plantarolateral approaches to the medial trochlear ridge. J Am Anim Hosp Assoc 1990; 26: 19-27.
• 12 DeCamp CE. External coaptation.. In: Textbook of Small Animal Surgery. 3rd ed. Slatter D, editor. Philadelphia: Saunders; 1993: 1840.
• 13 Ekman S, Carlson CS. The pathophysiology of osteochondrosis. Vet Clin North Am Small Anim Pract 1998; 28: 17-32.
• 14 Smith MM, Vasseur PB, Morgan JE. Clinical evaluation of dogs after surgical and nonsurgical management of osteochondritis dissecans of the talus. J Am Vet Med Assoc 1985; 187: 31-35.
• 15 Montgomery R, Hathcock J, Milton R. Osteochondritis dissecans of the canine tarsal joint. Comp Cont Ed Pract Vet 1994; 16: 835-845.
• 16 Milgram J. The development of loose bodies in human joints. Clin Orthop 1977; 124: 292-303.
• 17 Saotome K, Tamai K, Osada D. et al. Histologic classification of loose bodies in osteoarthrosis. J Orthop Sci 2006; 11: 607-613.
• 18 Gielen I, van Ryssen B, van Bree H. Computerized tomography compared with radiography in the diagnosis of lateral trochlear ridge talar osteochondritis dissecans in dogs. Vet Comp Orthop Traumatol 2005; 18: 77-82.
• 19 Gielen I, van Bree H, Van Ryssen B. et al. Radiographic, computed tomographic and arthroscopic findings in 23 dogs with osteochondrosis of the tarsocrural joint. Vet Rec 2002; 150: 442-447.
• 20 Gielen IM, De Rycke LM, van Bree HJ. et al. Computed tomography of the tarsal joint in clinically normal dogs. Am J Vet Res 2001; 62: 1911-1915.
• 21 Gielen I, Van Ryssen B, Coopman F. et al. Comparison of subchondral lesion size between clinical and non-clinical medial trochlear ridge talar osteochondritis dissecans in dogs. Vet Comp Orthop Traumatol 2007; 20: 8-11.
• 22 Cook JL, Tomlinson JL, Stoll MR. et al. Arthroscopic removal and curettage of osteochondrosis lesions on the lateral and medial trochlear ridges of the talus in two dogs. J Am Anim Hosp Assoc 2001; 37: 75-80.
• 23 Breur G, Spaulding H, Braden T. Osteochondritis dissecans of the medial trochlear ridge of the talus in the dog. Vet Comp Orthop Traumatol 1989; 3: 168-176.
• 24 Bree van HJ, Van Ryssen B. Diagnostic and surgical arthroscopy in osteochondrosis lesions. Vet Clin North Am Small Anim Pract 1998; 28: 161-189.