Page 110 - Manual of Equine Field Surgery

106 LIMB SURGERIES

dence of complications probably caused by the REFERENCES

extensive dissection required and large remaining

dead space has been reported. Additionally, recur- 1. Irwin DHG, Howell DW: Fibrotic myopathy,

rence in gait restriction secondary to fibrotic hematomas and scar tissue in the gaskin area of the

healing is likely.':'? thoroughbred, J South African Vet Assoc 52:65,

1981.

2. Bramlage LR, Reed SM, Embertson RM: Semi-

COMMENTS tendinosus tenotomy for treatment of fibrotic

rnyopathy in the horse, J Am Vet Med Assoc 186:565,

1985.
Fibrotic myopathy is commonly a result of trauma 3. Pickersgill CH, Kriz N, Malik.ides N: Surgical treat-

to the semitendinosus muscle with subsequent ment of semitendinosus fibrotic rnyopathy in an

inflammation, hematoma formation, and fibrosis endurance horse management, complications

or ossification. Involvement of the semimembra- and outcome, Equine Vet Educ 12:242, 2000.

nosus, biceps femoris, and gracilis muscles is also 4. Magee AA, Vatistas NJ: Standing semitendinosus

possible. In cases where the inciting injury was myotomy for the treatment of fibrotic myopathy

observed, the hind limb has been caught cranially in 39 horses, Proc Ani Assoc Equine Pract 44:263,

and underneath the horse or slipped forward 1998.

excessively during sliding stops. It has been 5. Villamandos RG, Santisteban IR, Avila I: Tenotomy

reported after intramuscular injections.Y:" Two of the tibial insertion of the semitendinosus muscle

congenital cases and three cases associated with of two horses with fibrotic myopathy, Vet Rec
126:67, 1995.

peripheral neuropathy have been reported.2•11 6. Dabareiner RM, Schmitz DG, Honnas CM, et al:

The gait associated with fibrotic myopathy is Gracilis muscle injury as a cause of lameness in two

likely caused by an effective shortening of the horses, J Am Vet Med Assoc 224:1630, 2004.

semitendinosus muscle and adhesions between 7. Adams SB, Fessler JF: Semitendinosus tenotomy for

the semitendinosus muscle and biceps femoris fibrotic myopathy. In Adams SB, Fessler JF, editors:

or semimembranosus muscles. This functional Atlas of equine sitrgery, Philadelphia, 2000, WB

shortening limits protraction of the hind.limb and Saunders.

results in the limb being retracted just before 8. Adams OR: Fibrotic myopathy in the hindlegs of

ground contact and contacting the ground in a horses, J Am Vet Med Assoc 139:1089, 1961.

pronounced vertical slapping motion. The abnor- 9. Sullins KE: Lameness. Part XIII: the femur. In

mality is most easily observed at a walk. The gait Stashak TS, editor: Adam's lameness in horses,
Philadelphia, 2002, Lippincott, Williams & Wilkins.
restriction appears to be primarily mechanical 10. Turner AS, Trotter GW: Fibrotic myopathy in the

and not directly associated with pain.
horse, J Am Vet Med Assoc 184:335, 1984.

11. Valentine BA, Rouselle SD, Sams AE, et al: Dener-

vation atrophy in three horses with fibrotic myopa-

thy, J Am Vet Med Assoc 205:332, 1994.