Is surgical removal of the eye warranted?
Sep 01, 2003
Signalment: Canine, Shih Tzu, 10 years old, male neutered, 20.7 lbs.
Clinical history: The dog presents today for a problem with the right eye and potential blindness.
Ultrasound examination: Thorough abdominal and right ocular ultrasonography was performed.
My comments: The liver shows an inhomogeneous to homogeneous texture in its parenchyma. No masses noted within the liver parenchyma.
The gall bladder is mildly distended, and its walls are not thickened or hyperechoic.
The urinary bladder is distended with urine and contains a lot of urine sediment material - no masses noted. There are multiple calculi present in the lumen of the urinary bladder and proximal urethra.
The prostate gland is slightly enlarged, symmetrical in shape, and possible calculus or consolidated sludge material present within the prostatic urethra. The left and right adrenal glands are similar in size and shape. The stomach, small intestines, and colon are normal. The pancreas shows an inhomogeneous texture in its parenchyma.
One or two round-shaped echogenic areas are caudal to the optic disk in the extraocular area surrounding the optic nerve. The left eye is normal in the anterior chamber, posterior chamber, posterior lens, and optic disk.
Case management: In this case, right ocular mass and cystic calculi are the clinical diagnosis. The right ocular mass is most likely a melanogenic neoplasia. There was no obvious evidence of metastatic disease noted during this abdominal ultrasound study.
Therapy thereafter would depend on the findings from the histopathologic examination after right eye removal. Therapy for the cystic calculi could include feeding exclusively Waltham's S/O diet.
A bacterial urine culture is warranted and daily antibiotics administered according to the results of the urine culture. After about eight weeks of dietary management, cystic calculi may be resolved.
Ocular and orbital imaging technique Imaging of ocular and orbital structures has been improved by the development of ultrasonography, computed tomography and magnetic resonance imaging (MRI).