Case study

Authors: CERI E. SHERLOCK, TIMOTHY S. MAIR, RACHEL C. MURRAY, TONY S. BLUNDEN
Journal: Veterinary Radiology and Ultrasound

Emaciated human patients have changes in the fat content in medullary bone that are consistent with serous atrophy of the bone marrow histologically. Serous atrophy has been identified at postmortem examination in horses; however, the magnetic resonance (MR) characteristics have not been documented. Herein we describe the abnormalities of the bone marrow and medullary bone detected by low-field and high-field MR imaging of the distal limbs of three emaciated horses.

Category: Case study - Equine - MRI
Authors: Russell A. Parker, BVSc , Bruce M. Bladon, BVM&S, DESTS, Diplomate ECVS , Kate McGovern, BvetMed , and Ken C. Smith, BVM&S, FRCPath, FRCVS
Journal: Veterinary Surgery

Objective: To describe and discuss previously unreported complications associated with intraosseous perfusion with gentamicin in horses.

Study Design: Case report.

Animals: Ten-year-old Warmblood gelding.

Methods: Intraosseous perfusion with gentamicin into the proximal phalanx (P1) was used as part of the treatment regimen for distal interphalangeal joint and navicular bursa synovial sepsis. Although the sepsis responded favorably complications developed at the perfusion site, including persistent osteomyelitis, progressive osteonecrosis, and ultimately pathologic fracture of P1.

Authors: H. Brommer*, S. Weisler † and A. J. Tatz †
Journal: Equine Veterinary Education

A 4-day-old Arabian filly was referred for severe lameness due to a flexurally deformed, open, luxated and infected metacarpophalangeal joint. Arthrodesis was indicated as progressive cartilage destruction and osteomyelitis developed. An alternative arthrodesis technique was employed, which consisted of a loop of cerclage wire running through predrilled holes in a lateromedial direction and dorsal to the central axis of the third metacarpal bone and proximal phalanx, in combination with external coaptation using a half-limb transfixation cast.

Category: Case study - Equine
Authors: BETSY VAUGHAN 1 , MARY B. WHITCOMB 1 , SARAH M. PUCHALSKI 1 , AMY E. POULIN-BRAIM 1 , JORGE E. NIETO 1 , LARRY D. GALUPPO 1
Journal: Veterinary Radiology & Ultrasound

Thromboses of the cranial tibial vein (Horse 1) and brachial, median, and cranial circumflex humeral arteries (Horse 2) were identified as causes of unilateral lameness in two Thoroughbred racehorses. Nuclear scintigraphy was performed for suspicion of long bone stress fractures but instead allowed identification of unusual areas of increased radiopharmaceutical uptake within soft tissues of the affected limbs.

Category: Case study - Equine
Authors: K. D. Miller and J. S. Juzwiak
Journal: Equine Veterinary Education

A 3-month-old Standardbred colt was examined for acute, bilateral hindlimb swelling and lameness. Serum chemistry demonstrated elevated muscle enzymes (AST, ALT, LDH and CK). Radiographs of the hindlimbs demonstrated intact proximal sesamoid bones that were displaced distally and subluxation of the pastern joints. Ultrasonography of the affected areas revealed large, diffuse hypoechoic areas in the bodies of both hind suspensory ligaments consistent with bilateral rupture. Histology of the lesions was consistent with degenerative suspensory desmitis with acute rupture.

Category: Case study - Equine - Tendon
Authors: C. P. CRIJNS, I. M. V. L. GIELEN*, H. J. J. van BREE and E. H. J. BERGMAN †
Journal: Equine Veterinary Journal

A 5-year-old Rheinlander gelding was evaluated for left hindlimb stifle lameness. The lameness was localised to the stifle, but source of the lameness was not specifically diagnosed from the physical, radiographic and ultrasonographic examinations. Computed tomography (CT) and CT arthrography were therefore used for further investigation since these imaging techniques image bony structures, cartilage and soft tissues.

Category: Case study - CT - Equine - Lameness
Authors: JESUS SÁNCHEZ 1 , JOSÉ M. GONZALO-ORDEN 1 , MÁRIO M. D. GINJA 2 , PAULA A. OLIVEIRA 3 , LUIS E. REYES 1 , ALICIA E. SERANTES 1 , MARIA A. ORDEN 1
Journal: Veterinary Radiology & Ultrasound

An Andalusian Stallion with left hind limb lameness had a radiolucent lesion in the medullary cavity of distal tibial metaphysis. After euthanasia for other disease, the tibia was examined with magnetic resonance (MR). The MR imaging sequences were characterized by a double line sign, although showing quite different lesion area intensities. Histologically, the lesion was compatible with medullary infarction being characterized by normal spongy bone, areas of abundant fibrous tissue and numerous necrotic adipocytes in various stages of destruction.

Category: Case study - Equine - MRI
Authors: K. Pieber, A. Kuebber-Heiss † , P. Kuebber ‡ and J. Kofler
Journal: Equine Veterinary Education

This case study describes a rare case of a fibro-osseous tumour in the distal part of the fourth metacarpal bone of a 13-year-old horse. The tumour was surgically removed and wound healing occurred without complications. A specific diagnosis was reached by considering the clinical and histological features of the mass. However, the process was complicated by the different classification systems for this type of tumour. When classified according to the veterinary literature, ossifying fibroma is the appropriate diagnosis, whereas in human medicine this term has been replaced.

Category: Case study - Equine
Authors: Lewis C.R. Smith
Journal: Journal of Equine Veterinary Science

The aim of this study is to describe the successful treatment of a synovial hernia associated with the digital flexor tendon sheath (DFTS) in a 17-year-old pony. The pony presented with left forelimb lameness and multiple unusual swellings of the palmar and plantar aspect of the fetlock. The lameness was isolated to a swelling in close proximity to the DFTS of the left forelimb using diagnostic analgesia, and on diagnostic imaging, the swelling was found to be associated with the DFTS.

Category: Case study - Equine
Authors: Tóth, F.; Schumacher, J.; Newman, S.
Journal: Equine Veterinary Education

A 4-year-old, Spanish Mustang mare was evaluated because of a swelling on the dorsolateral aspect of its right carpus. The horse had no gait abnormalities. During radiographic examination of the carpus, a granular, radiopaque mass, approximately 3 cm in diameter, adjacent to the proximal row of carpal bones, was observed. The mineralised mass, which was located within the antebrachiocarpal joint, was removed through an arthrotomy with the horse anaesthetised.

Category: Case study - Equine