Neoplastic pleural effusion and intrathoracic metastasis of a scapular osteosarcoma in a dog: a multidisciplinary integrated diagnostic approach

Mesquita, Luis, Mortier, Jeremy, Ressel, Lorenzo ORCID: 0000-0002-6614-1223, Finotello, Riccardo ORCID: 0000-0002-1932-211X, Silvestrini, Paolo and Piviani, Martina (2017) Neoplastic pleural effusion and intrathoracic metastasis of a scapular osteosarcoma in a dog: a multidisciplinary integrated diagnostic approach. VETERINARY CLINICAL PATHOLOGY, 46 (2). pp. 337-343.

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Abstract

A 10-year-old, female spayed mixed-breed or cross-bred dog was referred to the Small Animal Teaching Hospital of the University of Liverpool due to tachypnea, dyspnea, and pleural effusion not responding to diuretics and antibiotics. The chest was drained and cytology of the pleural fluid was consistent with a modified transudate with presence of atypical cells initially attributed to mesothelial hyperplasia and dysplasia. Computed tomography detected, in addition to the bilateral pleural effusion, diffuse pleural thickening, multiple pleural and pulmonary nodules, and a mineralized and lytic mass in the left scapula. Imaging findings were suggestive of a primary bone tumor with intrathoracic metastasis. Cytology of the left scapular and pleural masses revealed a malignant neoplasm highly suggestive of osteosarcoma. The diagnosis was confirmed by demonstration of a positive cytochemical reaction for alkaline phosphatase on prestained cytology slides. This finding prompted review of the initial interpretation of the pleural effusion cytology. The presence of neoplastic osteoblasts in the thoracic fluid was identified by a combination of cytochemistry, cell pellet immunohistochemistry, and transmission electron microscopy findings. In this report, a multidisciplinary integrated diagnostic approach was used to diagnose and confirm a neoplastic pleural effusion due to osteosarcoma metastasis in a dog.

Item Type:	Article
Uncontrolled Keywords:	Bone tumor, cell pellet immunohistochemistry, computed tomography, dog, fluid cytology, transmission electron microscopy
Depositing User:	Symplectic Admin
Date Deposited:	27 Nov 2018 09:56
Last Modified:	19 Jan 2023 01:11
DOI:	10.1111/vcp.12474
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3029078