Lameness in a dog caused by thoracic wall invasion by a pulmonary neoplasm.
A 12-year-old fox-terrier dog presented with forelimb lameness of 3-weeks duration. Ultrasonography revealed a mass within the thoracic wall and osteolysis of the left third rib. A squamous cell carcinoma was diagnosed by cytological examination of an ultrasound-guided fine needle aspirate of this mass. As a result of the diagnosis of neoplasia, the dog was euthanatized. Necropsy revealed a solitary expansile mass within the left cranial lung lobe, and a mass within the adjacent thoracic wall. Thickening of the pleura between the two masses was visible, although adhesions were not present. Histology of both masses revealed a well-differentiated squamous cell carcinoma. To the authors' knowledge, this is the first detailed description of direct invasion of the thoracic wall by a canine lung tumour.
Munday
J S
JS
Department of Pathobiology, Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand. J.Munday@massey.ac.nz
Boston
S E
SE
Owen
M C
MC
French
A F
AF
Aberdein
D
D
D000818:Animals; D004283:Dog Diseases / Q000000981:diagnostic imaging / Q000473:pathology*; D004285:Dogs; D017809:Fatal Outcome; D005260:Female; D005552:Forelimb; D007794:Lameness, Animal / Q000209:etiology*; D008175:Lung Neoplasms / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary*; D018307:Neoplasms, Squamous Cell / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary*; D013909:Thorax / Q000473:pathology*; D014463:Ultrasonography