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LOW‐FIELD MAGNETIC RESONANCE IMAGING OF EARLY SUBCHONDRAL CYST‐LIKE LESIONS IN INDUCED CRANIAL CRUCIATE LIGAMENT DEFICIENT DOGS
Author(s) -
Baird Debra K.,
Hathcock John T.,
Kincaid Steven A.,
Rumph Paul F.,
Kammermann John,
Widmer William R.,
Visco Denise,
Sweet Donald
Publication year - 1998
Publication title -
veterinary radiology and ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.541
H-Index - 60
eISSN - 1740-8261
pISSN - 1058-8183
DOI - 10.1111/j.1740-8261.1998.tb00334.x
Subject(s) - medicine , cruciate ligament , magnetic resonance imaging , lesion , tibia , anatomy , radiography , stifle joint , anterior cruciate ligament , cyst , radiology , pathology
Six healthy adult male mongrel dogs underwent cranial cruciate ligament transection in the left stifle. Survey radiography of both stifles and low‐field (0.064 T) MRI of the left stifle were performed preoperatively and at 2, 6, and 12 weeks postoperatively. Focal changes in signal intensity were seen with MRI in the subchondral bone of the medial tibial condyle at 2 and 6 weeks postoperatively. At 12 weeks postoperative, a cyst‐like lesion was detected using MRI in the subchondral bone of the medial tibial condyle in 4 of 6 dogs and a less defined lesion at this site in the remaining 2 dogs. The cyst‐like lesion was spherical in shape and showed typical characteristics of fluid with low signal intensity on T1‐weighted images, high signal intensity on T2‐weighted images and high signal intensity on inversion recovery images. The lesion was seen in the subchondral bone of the caudal medial and/or middle region of the tibial plateau slightly cranial to the insertion of the caudal cruciate ligament. No subchondral cysts were seen in the tibia on radiographs. Histopathologically, the tibia was characterized by a loose myxomatous phase of early subchondral cyst formation.