Some observations on lameness associated with pain in the proximal metacarpal region.
Abstract: The carpus and metacarpus of 40 horses which were free from lameness and 40 horses with lameness associated with the metacarpophalangeal joint or more distal limb were examined radiographically (Group A). The opacity of the proximal third of the third metacarpal bone was regular, with a uniform trabecular pattern. Osseous cyst-like lesions (OCLLs) were identified in the radial carpal bone (1), the ulnar carpal bone (2), the second carpal bone (15) and the fourth carpal bone (1). Thirty-one of 638 horses (4.8 percent) with forelimb lameness had pain localised to the proximal metacarpal region using local anaesthesia (Group B). All these horses were examined radiographically and an ultrasonographic examination was performed in seven. No definitive diagnosis was reached in 16 horses, seven of which had an OCLL in one of the carpal bones or the second metacarpal bone. One horse had, in addition to a poorly defined lucent area in the second carpal bone, radiographic evidence of degenerative joint disease of the carpometacarpal joint and an hypoechoic lesion in the accessory ligament of the deep digital flexor tendon. One horse had an hypoechoic lesion in the proximal part of the suspensory ligament. Abnormalities of the trabecular structure of the third metacarpal bone were identified in 13 horses. In 11 of these there was a vertically orientated lucent line, usually surrounded by sclerotic bone. These lucent lines may represent fatigue fractures seen end on. In one horse an horizontal lucent line was seen. One of these 13 horses also had a lesion in the proximal part of the suspensory ligament. Ten of the 13 (77 per cent) horses with presumed fractures of the third metacarpal bone recovered completely, whereas only eight of the 16 (50 per cent) horses in which no definitive diagnosis was reached returned to their former function.
Publication Date: 1988-09-01 PubMed ID: 9079062DOI: 10.1111/j.2042-3306.1988.tb04647.xGoogle Scholar: Lookup
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- Journal Article
Summary
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This study investigates lameness in horses related to pain in the upper part of the metacarpal region, otherwise known as the front leg. Using radiographic examinations and local anesthesia to identify the root cause, the results provide insights into bone lesions, irregularities in the metacarpal bone, and recovery rates from different conditions.
Study Overview and Objectives
- The study began by examining the carpus and metacarpus (sections of the horse’s leg) of 80 horses in total; 40 of which were without lameness, and 40 with lameness associated with the metacarpophalangeal joint or more distal limb (further from the centre of the body).
- One of the primary aims was to undertake a detailed examination of the horses’ limbs using radiographic imaging to disclose any abnormalities that could contribute to their lameness.
- The study also aimed to identify any osseous cyst-like lesions (OCLLs) and assess their prevalence as well as association with lameness.
Methodology
- A group of 638 horses with forelimb lameness were used for the study.. Local anaesthesia was used to identify pain in the proximal metacarpal region in 31 horses; this makes up 4.8 percent of all horses observed.
- These 31 horses underwent radiographic examination, and 7 of them were also examined using an ultrasonographic system.
Findings
- No definitive diagnosis was made for 16 of the 31 horses. Among these, seven had an OCLL either in one of the carpal bones or the second metacarpal bone.
- One horse, in addition to having a vaguely defined lucent area in the second carpal bone, showed signs of degenerative joint disease in the joint between the carpus and metacarpus, as well as an hypoechoic lesion in the deep digital flexor tendon.
- Another horse presented an hypoechoic lesion in the suspensory ligament’s proximal region.
- Irregularities in the third metacarpal bone’s trabecular structure were found in 13 horses. Eleven of these had vertical lucent lines typically surrounded by hardened bone. These lines may indicate end-on fatigue fractures.
- One of the 13 horses showed an anomaly in the suspensory ligament’s proximal area.
Outcome and Recovery Rates
- Out of the 13 horses possibly suffering fractures in the third metacarpal bone, 77 percent (10 horses) recovered completely.
- On the other hand, amongst the 16 horses without a clear diagnosis, only 50 percent (8 horses) returned to their previous functionality levels.
Cite This Article
APA
Dyson S.
(1988).
Some observations on lameness associated with pain in the proximal metacarpal region.
Equine Vet J Suppl(6), 43-52.
https://doi.org/10.1111/j.2042-3306.1988.tb04647.x Publication
Researcher Affiliations
- Equine Clinical Unit, Animal Health Trust, Newmarket, Suffolk.
MeSH Terms
- Anesthesia, Local / veterinary
- Animals
- Carpal Bones / diagnostic imaging
- Carpus, Animal / diagnostic imaging
- Follow-Up Studies
- Horse Diseases / diagnostic imaging
- Horse Diseases / etiology
- Horses
- Lameness, Animal / diagnostic imaging
- Lameness, Animal / etiology
- Metacarpus / diagnostic imaging
- Nerve Block / veterinary
- Pain / veterinary
- Radiography
- Sports
- Ultrasonography
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