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PubMed2004

Management of leishmanial osteolytic lesions in a hypothyroid dog by partial tarsal arthrodesis.

A five-year-old male boxer, previously diagnosed with leishmaniasis and hypothyroidism, had gradually become unable to bear weight on its left hindlimb. Physical examination revealed a left popliteal lymphadenopathy, mild crepitus, and severe swelling of the left tarsal joint, a radiographic examination of which revealed severe bone destruction of the talus and a periosteal reaction of the calcaneus. Laboratory findings and serological tests suggested an active leishmanial infection, and a Leishmania species was identified by direct cytology of a sample from the osteolytic area and by indirect immunohistochemistry of a bone biopsy. The dog's condition improved when it was treated with meglumine antimonate and allopurinol. Because of the large osteolytic area and the increased use of the affected leg, a partial tarsal arthrodesis was performed to prevent a fracture. Five months after the surgery, the osteolytic area had healed completely and the calcaneus periosteal reaction had disappeared.

Allopurinol↗

PubMed1990

[Radiography profile in forced plantar flexion for studying unsteady feet].

We have studied the interest of an original radiological incidence ("Plantar hyperflexion") allowing to demonstrate a possible hyperlaxity of medio-tarsal joints. We discovered a significant difference of mobility between patients with unstable feet and the control group. The existence of a medio-tarsal hyperlaxity should be taken into account before starting any treatment.

Foot↗

PubMed1978

Centripetal compression triple arthrodesis.

Forty-nine compression triple arthrodeses were performed in 45 patients whose average age was 16 years. An external compression device was applied to secure rigid fixation of the tarsal bones. The device consisted of two large rings, six compression screws and six small transfixion rings. Union of the tarsal joints was obtained within 6 weeks in 93.7 per cent of cases, and within 8 weeks in the remaining 6.3 per cent. Non-union was completely avoided and the period until fusion reduced to almost half that expected after conventional operations. The compression also ensured maintenance of the correction of deformity initially obtained.

Adolescent↗

PubMed1984

Spavin: a proposed term for a non-fracture associated canine hock lesion.

In accordance with macroscopic and microscopic features of the tarsal joint degeneration in the greyhound dog, the possibility of establishing a direct relation between this process and spavin or bone spavin is proposed. To date this has been considered limited to equine and occasionally bovine stock. This investigation has been carried out on three different levels: macroscopic, radiological and histological and has been completed with the corresponding graphic documentation.

Animals↗

PubMed1992

Arthritis and hematological changes induced by an analogue of muramyl dipeptide in rats.

We examined changes of blood cell counts and development of arthritis induced by daily subcutaneous injections of MDP-Lys(L18), an analogue of muramyl dipeptide (MDP), in rats. The numbers of neutrophils markedly increased in the peripheral blood 4 hr after the 1st, 7th, and 14th administrations of MDP-Lys(L18), but they recovered to the control levels within 24 hr. Monocyte and lymphocyte counts increased after the 7th and 14th administrations, respectively, although both decreased after the 1st dosing. Serum inflammatory markers, such as albumin, globulin, mucoprotein, sialic acid, and iron, showed marked changes after the 1st administration. Histopathologically, the synovial membrane of the tarsal joint showed a multilayer arrangement of synoviocytes with vesicular cytoplasms and infiltration of neutrophils from 6 hr after the 1st administration of the drug. The acute synovitis was gradually enhanced until 24 hr later. The synovitis was greatly decreased in degree after the 3rd administration, but increased again later. After the 7th and 14th administrations, mononuclear cells and lymphocytes, respectively, infiltrated the synovial membrane, in a manner corresponding to the hematological findings. However, exudative changes and neutrophilic infiltration were still observed after the 14th drug administration, and the synovitis was repaired after a 7-day recovery period.

Acetylmuramyl-Alanyl-Isoglutamine↗

PubMedDate not supplied

[Sonographic diagnosis of the juvenile tarsus. Clinical application possibilities demonstrated by examples].

Radiologic assessment of foot deformities in young children is limited especially by the ossification status. Ultrasonography proved to be a useful diagnostic supplement e.g. in idiopathic talipes equinovarus, vertical talus, and tarsal coalitions. Effects of treatment and three-dimensional movements of the tarsal joint complex can be delineated. Sonographic assessment of tarsal alignment is applicable already in the first months of life. This study deals with first experiences in clinical application of this new diagnostic technique.

Ankle↗

PubMed1975

Cavus deformity of the foot after fracture of the tibial shaft.

Twenty-three cases of claw foot with limited talocrural and subtalar mobility were the result of muscle contracture of the leg after tibial-shaft fracture. A roentgenographic study including arteriography was performed. It was concluded that the typical short cavus foot is due to fibrous contracture of the muscles in the deep posterior compartment caused by vascular damage, swelling in the deep posterior compartment, or severe muscle laceration. On physical examination the distance between the lateral malleolus and the Achilles tendon was shortened in comparison with the sound side in all cases. This was found to be caused by dorsiflexion in the talocrural joint coincident with adduction in the mid-tarsal joint. The angulation of the foot forced the patients to rotate the leg outward in order to get the feet in parallel position for walking. This deformity could be misinterpreted as an inward malrotation of the tibial fracture. In severe cases a derotating three-dimensional wedge osteotomy of the distal part of the tibia was performed with promising results.

Adolescent↗

PubMed2003

Effect of induced unilateral synovitis of distal intertarsal and tarsometatarsal joints on sagittal plane kinematics and kinetics of trotting horses.

OBJECTIVE: To study the effect of unilateral synovitis in the distal intertarsal and tarsometatarsal joints on locomotion, including the compensating effects within and between limbs. ANIMALS: 4 clinically normal horses. PROCEDURE: Gait analyses including kinematics, force plate, and inverse dynamic analysis were performed at the trot before lameness, after which synovitis was induced by injecting endotoxin into the right distal intertarsal and tarsometatarsal joints. Gait analyses were repeated 24 to 30 hours later during lameness. Differences between the stride variables during the 2 conditions (lame and sound) were identified. RESULTS: Tarsal joint range of motion, peak vertical force, and vertical impulse were decreased during lameness. Mechanical deficits included a decrease in negative work performed by the tarsal extensors during the early stance phase and a decrease in positive work by the tarsal extensors during push off. No compensatory changes in work were performed by other joints within the lame hind limb during the stance phase. Vertical impulse in the diagonal forelimb decreased, but there were no significant changes in forces or impulses in the ipsilateral forelimb or contralateral hind limb. CONCLUSION AND CLINICAL RELEVANCE: Results indicate that horses are able to manage mild, unilateral hind limb lameness by reducing the airborne phase of the stride rather than by increased loading of the compensating limbs.

Animals↗

PubMed1996

Chronic localized osteomyelitis caused by atypical infection with Blastomyces dermatitidis in a dog.

A 4-year-old male Golden Retriever was evaluated because of chronic non-weight-bearing lameness of the right hind limb associated with penetrating tarsal wounds. Arthritis of the tarsal joint and osteomyelitis of the talus were initially evident. Tarsal arthrodesis was performed 7 months after initial injury, but the lameness persisted. Ten months later, blastomycosis was diagnosed on the basis of results of histologic examination of bone biopsy specimens and serologic tests. No other site of involvement was detected. The limb was amputated, and Blastomyces dermatitidis was isolated from the affected bone. Adjuvant antifungal treatment was not given. Ten months after amputation, the dog was in good health, and the antibody titer for B dermatitidis was low, indicating resolution of the infection. Localized bone infection with B dermatitidis is rare in dogs. In this dog, it was believed that blastomycosis was contracted through direct inoculation of the organism, because the lesion was associated with puncture wounds and other sites of involvement were not found.

Amputation, Surgical↗

PubMed1999

Effect of diacerein on spontaneous polyarthritis in male New Zealand black/KN mice.

OBJECTIVE: Male New Zealand black/KN (NZB/KN) mice spontaneously develop polyarthritis, characterized by destructive damages to the articular cartilage and bone. We assessed effects of diacerein in male NZB/KN mice by radiographic and histopathologic examinations. DESIGN: Diacerein, cyclosporin A or vehicle for the control were orally administered for 7 months, initiating at 8 weeks of age when the arthritis became apparent. RESULTS: At 39 weeks of age, the NZB/KN mice developed polyarthritis in the joints of the forelimbs and hind legs, radiographically characterized by joint space narrowing, deformation of the joint surfaces, and bone erosions. Histopathologic findings showed that the tarsal joints and knee sections from the NZB/KN mice exhibited overt arthritic lesion. Radiographic and histopathologic findings showed that diacerein and cyclosporin A at a dose of 30 mg/kg/day significantly reduced the progression of arthritis. CONCLUSIONS: Diacerein shows articular protecting effects against the development of spontaneous arthritis in male NZB/KN mice and diacerein might be useful in the treatment of chronic inflammatory joint diseases during clinical use.

Animals↗

PubMed1996

Importance of Staphylococcus hyicus ssp hyicus as a cause of arthritis in pigs up to 12 weeks of age.

Lame pigs, up to 12 weeks of age, were necropsied to establish a diagnosis. Of 175 pigs examined, 165 were confirmed to have arthritis by histopathological examination of joint tissues. Lesions were most common in the elbow and tarsal joints and least common in the joints of the feet. Typically, there was severe fibrinopurulent inflammation of synovial membranes regardless of the bacteria isolated. A bacterial aetiology was found in 114 (69%) of the 165 pigs. In arthritic pigs in which an aetiology was established the causative agents were Staphylococcus hyicus ssp hyicus (24.6%), Streptococcus equisimilis (26.3%), Actinomyces pyogenes (13.2%), Staphylococcus aureus (7.9%) and Haemophilus parasuis (7.9%). While gender did not affect the prevalence of arthritis, there was an age influence, most of the pigs culled for arthritis being under 6 weeks of age.

Actinomyces↗

PubMed1988

Neuropathic ankle joint in Charcot-Marie-Tooth disease after triple arthrodesis of the foot.

Charcot-Marie-Tooth disease results in pes cavus or equinocavovarus deformity. An accepted surgical correction is triple arthrodesis of the foot. In a retrospective study of 45 Charcot-Marie-Tooth patients, two cases developed neuropathic ankle joint after triple arthrodesis. This procedure prevents mobility of the tarsal joint and consequently increases stress on the ankle joint. If coupled with decreased joint sensation, it may predispose the ankle to neuroarthropathy. This paper emphasizes joint position sense as an important consideration before triple arthrodesis or any other surgical procedure.

Adolescent↗

PubMed1983

Investigations of the symptomatology and the significance of immediate skin test reactivity in canine atopic dermatitis.

Immediate skin test reactivity was determined with skin threshold concentrations of different allergen solutions in 208 dogs suspected of atopic dermatitis. Thirty-eight of the dogs (18.3 per cent) exhibited no reaction. Multisensitivity occurred in 59.1 per cent. House dust (39.4 per cent), human dandruff (39.9 per cent), dog dandruff (25.0 per cent), cat dandruff (29.8 per cent) and grasses (21.2 per cent) caused most of the positive reactions. The number of immediate skin reactions per dog was increased in those dogs that had had clinical signs for two to three years, as compared to dogs having had clinical signs for five or more years. Involvement of the extensor aspect of the carpal joint (41.2 per cent) and the flexor surface of the tarsal joint (30.6 per cent) was noticed only in dogs with positive immediate skin test reactivity. Together with the frequent occurrence of lichenification (84.1 per cent) this distribution pattern in dogs seems to mimic the signs of atopic dermatitis in man more closely than has been described previously.

Age Factors↗

PubMed2001

Kinematic characteristics of Andalusian, Arabian and Anglo-Arabian horses: a comparative study.

The aim of this study was to compare the kinematic trot characteristics of three different breeds of horse: Andalusian (AN, n = 15), Arabian (AR, n = 7) and Anglo-Arabian (AA, n = 5) using standard computer-assisted videography (25 Hz). Linear, temporal and angular parameters in fore- and hind limbs were analysed in six randomly selected strides per horse. Normalised angle-time diagrams along the complete stride were obtained for all joints angles in each breed and specific kinematic characteristics were detected graphically. AA horses displayed longer swing durations in both limbs ans a shorter angular range of motion (ARM) in scapula and pelvis inclination and in shoulder, hip and forelimb retraction-protraction angles. At lift off, stifle and tarsal joint angles were more flexed. In general, only small differences were observed in AR horse kinematics when compared with the other 2 breeds. AN horses presented negative overtracking length, which was positive in AR and AA. In AN horses the elbow and carpal joints were more flexed at the moment of maximal elevation, elbow and fore-fetlock joints also exhibited a larger ARM due to a smaller angle at maximal flexion. In the hind limbs, tarsal, hind fetlock and retraction-protraction angles presented a larger ARM in AN horses due to greater maximal flexion in the tarsal and hind fetlock joints. Fore- and hind fetlocks were also more flexed in horses from this breed. In conclusion, differences between kinematic variables at the trot were observed in the three breeds studied here, mainly in forelimb joints. The most outstanding feature was the greater forelimb flexion recorded in AN horses than in the other breeds which is consistent with the elevated movements in this breed. In AA horses, the ARM of proximal joints involved in retraction protraction in both fore- and hind limbs was smaller. All the differences observed highlighted the idiosyncratic nature of the trot in each breed; this may influence the functional capacity of each breed.

Animals↗

PubMed1990

Lameness diagnosis and treatment in the quarter horse racehorse.

Lameness problems constitute a major part of racing Quarter Horse practice. This article considers the diagnosis, prognosis, and treatment of the frequently encountered lamenesses. The main conditions included are synovitis, intra-articular fractures, osteochondritis dissecans, and degenerative joint disease as they relate to the coffin, fetlock, carpal, and tarsal joints. Intra-articular injection techniques and medications are discussed because of the frequency of joint disease. Bucked shins and stress fractures are also reviewed.

Animals↗

PubMed2005

Determination of the anatomic communications among compartments within the carpus, metacarpophalangeal and metatarsophalangeal joints, stifle joint, and tarsus in llamas.

OBJECTIVE: To determine the anatomic communications among compartments within the carpus, metacarpophalangeal and metatarsophalangeal joints, stifle joint, and tarsus in llamas. SAMPLE POPULATION: 88 limbs from 22 llamas necropsied because of reasons unrelated to disease of the carpus; tarsus; or metacarpophalangeal, metatarsophalangeal, or stifle joints. PROCEDURE: 1 compartment (randomly assigned) of each joint was injected with blue latex solution. Communication between joint compartments was determined by observation of latex in adjacent compartments following frozen sectioning. RESULTS: Of the 44 carpi, 30 (68%) had anatomic separation between the radiocarpal and middle carpal joints, whereas the remaining 14 (32%) had communication between the radiocarpal and middle carpal joints. In the metacarpophalangeal or metatarsophalangeal joints, medial and lateral joint compartments remained separate in 83 of 88 (94%) joints injected. The tibiotarsal and proximal intertarsal joints communicated in all tarsi examined, whereas 14 of 38 (37%) communicated between the proximal intertarsal and distal intertarsal joints. Communication between the distal intertarsal and tarsometatarsal joints was detected in 17 of 25 (68%) specimens; all 4 tarsal joints communicated in 11 of 42 (26%) specimens examined. Examination of 33 stifle joints that were successfully injected revealed communication between the femoropatellar, medial femorotibial, and lateral femorotibial joints. CONCLUSIONS AND CLINICAL RELEVANCE: These data suggest that it is important to determine the joint communications specific to each llama prior to treatment of septic arthritis. The metacarpophalangeal or metatarsophalangeal joint compartments may be considered separate, although the lateral and medial compartments infrequently communicate along the proximal palmar or plantar aspect.

Animals↗

PubMed2005

Is there a characteristic distal tarsal subchondral bone plate thickness pattern in horses with no history of hindlimb lameness?

REASONS FOR PERFORMING STUDY: Osteoarthritis (OA) is a common cause of distal tarsal pain, but disease development is poorly understood. Awareness of normal tarsal structure and function is important in order to understand the pathogenesis of OA. Thickening of the subchondral bone (SCB) plate has been related to the development of OA, but SCB plate patterns in the equine tarsus have not been documented. HYPOTHESES: There is a repeatable pattern of SCB thickness across the distal tarsal joints, and specifically that thickness would be greatest dorsally and laterally. METHODS: Twenty cadaver tarsi were collected from mature horses that had undertaken low-level exercise only with no history of hindlimb lameness. Magnetic resonance images were acquired using a high-resolution sagittal 3-dimensional T1-weighted spoiled gradient echo sequence. Subchondral bone thickness was measured on sagittal images at dorsal and plantar locations on the proximal and distal aspects of the central (CT) and third (T3) tarsal bones and proximal aspect of the third metatarsal bone (Mt3). RESULTS: On the proximal aspect of CT, medial and lateral SCB thickness were significantly greater than midline. On the distal aspect of CT and T3 and proximal Mt3, lateral SCB thickness was significantly greater than medial and midline sites. Dorsal SCB thickness was greatest on the proximal and distal aspects of CT and proximal Mt3. Subchondral bone accounted for a greater proportion of CT and T3 on the dorsal aspect than the plantar. CONCLUSIONS: There is a repeatable pattern of SCB thickness in the distal tarsal bones of horses with no history of hindlimb lameness. This reflects the pattern of loading across the joints. POTENTIAL RELEVANCE: This study provides evidence of a consistent osteochondral pattern in the equine tarsus for reference in identification of osteoarticular pathologies.

Animals↗

PubMed1996

Nonlinear dynamics stability measurements of locomotion in healthy greyhounds.

OBJECTIVE: To characterize normal locomotion of dogs, using nonlinear dynamic stability measurements to analyze two-dimensional kinematic data. ANIMALS: 5 healthy, orthopedically sound Greyhounds. PROCEDURE: Data were studied by sequentially constructing phase plane portraits from the angular velocity and displacement data; creating first-return (Poincaré) maps from periodically sampled data; and evaluating the dynamic stability of the gait, using Floquet multipliers calculated from the assembled data. Retroreflective markers were placed on the left craniodorsal aspect of the iliac spine, greater trochanter, lateral epicondyle of the femur, lateral malleolus, and fifth metatarsophalangeal joint. Each dog was repeatedly led at a trot along a 10-m runway. Data were collected, using a video-based, two-dimensional motion measurement and analysis system. Dogs were considered a nonlinear system and were represented by the joint angular displacements and velocities. Phase plane portraits and first-return maps were constructed to analyze the smoothed data. The Floquet theory was then used to investigate the local stability of critical points of the discrete map. RESULTS: The femorotibial joint had the highest angular velocity, ranging from -2.5 to 4.9 radians/s. Tarsal joint velocity ranged from -2.7 to 3.2 radians/s, and the coxofemoral angle had the lowest range of -2.2 to 2.2 radians/s. The points on the first-return maps converged to the 45 degrees diagonal line and were clustered together. The largest Floquet multiplier averaged 0.452, which characterized the stability of this population and will be used to draw a comparison between this and future work. CONCLUSIONS: Nonlinear dynamics can be effectively used to analyze two-dimensional kinematic data from animal models to quantify the dynamic stability of animal locomotion through precise mathematical measurements. The method is general and can be applied to normal or abnormal gaits. CLINICAL RELEVANCE: Point mapping and quantitative measurement of joint movement have several advantages associated with the application to animal and human locomotion. The clinician can visually distinguish the normal gait pattern from abnormal patterns to assist in the diagnosis of musculoskeletal abnormalities (diseases).

Animals↗