Magnetic resonance imaging of a canine eye with melanoma.
An 8-year-old Beagle dog had exophthalmos of the left eye for the last two past months. On ophthalmoscopy, the intraocular lesion could not be evaluated due to the opacity of the cornea. Ultrasonography revealed that the eyeball was distorted in shape and shifted in position, however, the precise lesion could not be identified. On magnetic resonance (MR) imaging, the lesion was observed as hyperintense on T1-weighted and hypointense on T2-weighted images, similar to those reported in human melanoma. The lesion was histologically diagnosed to be malignant intraocular melanoma. Though this is only a case report, canine ocular melanoma may show the similar characteristic MR images as in human uveal malignant melanoma.
Kato
Kumiko
K
Laboratory of Veterinary Emergency Medicine, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
Nishimura
Ryohei
R
Sasaki
Nobuo
N
Matsunaga
Satoru
S
Mochizuki
Manabu
M
Nakayama
Hiroyuki
H
Ogawa
Hiroyuki
H
D000818:Animals; D004283:Dog Diseases / Q000473:pathology*; D004285:Dogs; D005094:Exophthalmos / Q000473:pathology / Q000662:veterinary*; D005123:Eye / Q000000981:diagnostic imaging; D005134:Eye Neoplasms / Q000473:pathology / Q000662:veterinary*; D008279:Magnetic Resonance Imaging / Q000662:veterinary; D008545:Melanoma / Q000473:pathology / Q000662:veterinary*; D014463:Ultrasonography