Peer-reviewed veterinary case report
Bone deformities in Toy Poodles with kneecap slipping problem
By Yasukawa, Shinji et al.·Published in Veterinary and comparative orthopaedics and traumatology : V.C.O.T·2021·Department of Veterinary Medicine, Japan·View original on PubMed →
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Original publication title: Morphological Analysis of Bone Deformities of the Distal Femur in Toy Poodles with Medial Patellar Luxation.
Plain-English summary
A group of Toy Poodles with medial patellar luxation (MPL), a condition where the kneecap dislocates, was studied to understand bone deformities in their hind legs. The research found that those with severe MPL had significant changes in the shape of their femur, particularly in the front part of the bone. These deformities could contribute to the severity of their knee problems. Understanding these bone changes can help veterinarians better diagnose and treat Toy Poodles suffering from this condition.
People also search for: Toy Poodle knee problems · medial patellar luxation treatment · dog femur deformities · why is my dog limping · Toy Poodle leg pain
Abstract
OBJECTIVE:  The aim of this study was to evaluate the bone deformities of the distal femur of Toy Poodles with medial patellar luxation (MPL) using computed tomography. METHODS:  Computed tomography data from 37 stifles of Toy Poodles (16 normal, 10 grade 2 MPL and 11 grade 4 MPL) were analysed. For trochlear morphology, sulcus angle, medial or lateral trochlear inclination and trochlear angle were compared. For condylar morphology, distance between the apex of the medial or lateral trochlear ridge and the most caudal point of the medial or lateral femoral condyle (MC or LC), the length of the cranial/middle (anterior) part (MC(a) or LC(a')) and caudal (posterior) part (MC(p) or LC(p')) of distal femur and medial or lateral condyle width (MCW or LCW) were measured, and the ratios of medial-to-lateral condyles and anterior-posterior parts were compared. RESULTS:  Sulcus angle was significantly higher, and medial trochlear inclination was significantly lower in grade 4 MPL group than other groups. Lateral trochlear inclination was not significantly different among 3 groups. Trochlear angles at proximal trochlear groove were significantly lower in grade 4 MPL group than other groups. MC/LC, MC(a)/LC(a'), MC(a)/MC(p), and LC(a')/LC(p') were significantly lower in grade 4 MPL group than other groups; however, there were no significant differences in MC(p)/LC(p') and MCW/LCW among three groups. CONCLUSION:  Hypoplasia of the cranial and middle rather than caudal compartment of the distal femur was the primary morphological abnormality in Toy Poodles with grade 4 MPL.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/33979880/