Abnormal Imaging Findings of the Femoral Third Trochanter in 20 Horses

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Injuries involving the femoral third trochanter are an uncommon but important source of equine lameness; however, clinical localization can be challenging. The purpose of this retrospective study was to describe ultrasonographic and scintigraphic findings in a group of horses with presumed third trochanter injury. Medical records of an equine referral hospital were searched from 2004-2014, and 20 horses met the inclusion criteria. Lesions consistent with third trochanter fracture were identified with ultrasound in 14/20 horses. Onset of lameness was acute (11), insidious (2), or unknown (1). All but one horse was lame at presentation, ranging from Grade 2-4/5. Ultrasound was the primary diagnostic modality in 5/14 horses with fragmentation, while scintigraphic findings of intense (3), moderate (5), and mild (1) increased radiopharmaceutical uptake (IRU) prompted ultrasonographic examinations in 9/14 fractured horses. A nondisplaced fracture was suspected in an additional horse with intense IRU and negative ultrasound findings. In the remaining five horses, imaging findings included only mild IRU. Lameness was localized to other regions in these cases. Six of 12 fractured horses with available outcome data were returned to function after a prolonged rehabilitation of 8-18 months. Scintigraphic findings helped to direct focused ultrasound exams in the majority of fracture cases. Horses with evidence of third trochanter fracture had similar clinical characteristics to that reported for pelvic fractures and authors therefore recommend ultrasonographic examination of both regions, especially when scintigraphy is unavailable. Prognosis for return to function in horses of the current study was less favorable than previously reported.

Original languageEnglish (US)
Pages (from-to)466-473
Number of pages8
JournalVeterinary Radiology and Ultrasound
Volume56
Issue number5
DOIs
StatePublished - Sep 1 2015

Fingerprint

thighs
Thigh
Femur
Horses
image analysis
horses
Radiopharmaceuticals
lameness
scintigraphy
Wounds and Injuries
retrospective studies
lesions (animal)
Radionuclide Imaging
prognosis
Medical Records
Referral and Consultation
Rehabilitation
Retrospective Studies

Keywords

  • Fall
  • Femur
  • Fracture
  • Lameness
  • Nuclear scintigraphy
  • Pelvis
  • Ultrasound

ASJC Scopus subject areas

  • veterinary(all)

Cite this

Abnormal Imaging Findings of the Femoral Third Trochanter in 20 Horses. / Shields, Georgette E.; Whitcomb, Mary B; Vaughan, Mary E; Wisner, Erik R.

In: Veterinary Radiology and Ultrasound, Vol. 56, No. 5, 01.09.2015, p. 466-473.

Research output: Contribution to journalArticle

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