Sequential canine neonatal spinal ultrasonography from birth till spinal ossification.

Received: Revised: Accepted: Online available: February 08, 2015 May 11, 2015 May 28, 2015 July 21, 2015 The purpose of this study was to report the normal ultrasonographic appearance and spinal cord sagittal diameter of canine neonates. Longitudinal and transverse scans were done on 11 clinically normal canine neonates were performed at 3, 10, 20 and 30 days of age, using 8-10 MHz linear transducer. Measurement of the spinal cord sagittal diameter was recorded at different spinal segments. The spinal cord was recognized as an anechoic to hypoechoic tubular structure within the spinal canal, the three meningeal layers enclosing the cord were identified as hyperechoic dura and pia matters with the anechoic subarachnoid matter in between the two. The spinal cord sagittal diameter at the cervical and lumbar regions was greater than that of the thoracic region, and the cord was tapered at the mid-lumbar region forming the conus medullaris. It was difficult to visualize the spinal cord after 30 days of age. In conclusion, ultrasonographic imaging of the canine neonatal spinal cord varies with age till 30 days old.

[1]  R. Reed,et al.  Magnetic Resonance Imaging (MRI) Spinal Cord and Canal Measurements in Normal Dogs , 2013, Anatomia, histologia, embryologia.

[2]  S. Hecht,et al.  Agreement between T2 and haste sequences in the evaluation of thoracolumbar intervertebral disc disease in dogs. , 2012, Veterinary radiology & ultrasound : the official journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association.

[3]  L. De Risio,et al.  Clinical and magnetic resonance imaging features of canine compressive cervical myelopathy with suspected hydrated nucleus pulposus extrusion. , 2012, The Journal of small animal practice.

[4]  M. Kramer,et al.  Ultrasonographic appearance of the craniocervical junction in normal brachycephalic dogs and dogs with caudal occipital (Chiari-like) malformation. , 2008, Veterinary radiology & ultrasound : the official journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association.

[5]  L. Lowe,et al.  Sonography of the neonatal spine: part 2, Spinal disorders. , 2007, AJR. American journal of roentgenology.

[6]  O. Aizenstein,et al.  Development of the Fetal Spinal Cord , 2006, Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine.

[7]  M. Nakayama.  INTRAOPERATIVE SPINAL ULTRASONOGRAPHY IN DOGS: NORMAL FINDINGS AND CASE-HISTORY REPORTS , 1993 .

[8]  I. Kricheff,et al.  Spinal cord imaging using real-time high-resolution ultrasound. , 1983, Radiology.

[9]  M. Herrtage,et al.  Radiographic definition of the anticlinal vertebra in the dog. , 2009, Veterinary radiology & ultrasound : the official journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association.

[10]  S. Takashima,et al.  Normal development of the spinal cord in neonates and infants seen on ultrasonography , 2004, Neuroradiology.

[11]  H. Ko,et al.  Gross quantitative measurements of spinal cord segments in human , 2004, Spinal Cord.

[12]  Scott A. Brown,et al.  ULTRASONOGRAPHIC ANATOMY OF THE NORMAL CANINE SPINAL CORD AND CORRELATION WITH HISTOPATHOLOGY AFTER INDUCED SPINAL CORD TRAUMA , 1995 .

[13]  W. Fricke,et al.  Anatomy of the Dog , 1995 .

[14]  J. Rubin,et al.  Spinal ultrasonography. Intraoperative and pediatric applications. , 1988, Radiologic clinics of North America.