The provided sources do not contain a systematic diagnostic algorithm for the coughing cat, specific diagnostic cutoffs for feline asthma, or quantitative criteria distinguishing asthma from pleural effusion. What the sources do address is the radiographic and clinical challenge of discriminating cranial mediastinal masses from pleural effusion in cats, and the clinical features associated with different causes of pleural effusion.
Radiographic discrimination of cranial mediastinal mass versus pleural effusion is the central diagnostic challenge when a cat presents with cranioventral opacity on right lateral thoracic radiographs. Pleural effusion accumulates cranioventrally on lateral views and cannot be distinguished from soft tissue radiographically, and when both a mass and effusion are present simultaneously, the effusion obscures the mass.Journal of the… Dorsal tracheal deviation occurs in cats with pleural effusion alone — not only with cranial mediastinal masses — making tracheal position an unreliable sole discriminator.Journal of the…
The most common mediastinal malignancies in cats are lymphoma and thymoma, with other causes including ectopic thyroid tissue, mediastinal cysts, granulomas, and rare neoplasms.Journal of the… Common causes of pleural effusion in cats include congestive heart failure (CHF), neoplasia, pyothorax, and feline infectious peritonitis (FIP).Journal of the…
Hypothermia at presentation supports CHF as the cause of pleural effusion, though the absolute temperature difference between CHF and non-CHF cats is too small to be used as a standalone discriminator.Journal of the… A high proportion of cats with pericardial effusion have concurrent CHF, though FIP has also been reported as a leading cause of pericardial effusion.Journal of the…
Ultrasound-guided cytology is the definitive next step when a mediastinal mass is suspected. Percutaneous fine-needle aspiration of a cranial mediastinal mass can yield cytomorphologic features consistent with mediastinal lymphoma, as demonstrated via intercostal approach.Journal of the… Ultrasound characterizes mass echotexture — heterogeneous parenchyma with hypoechoic, echogenic, and anechoic (vascular) components — and confirms the absence or presence of concurrent pleural effusion.Journal of the…
The sources do not provide diagnostic cutoffs, sensitivity, or specificity values for any individual test in this algorithm, nor do they address bronchoscopy, bronchoalveolar lavage, or airway cytology for asthma diagnosis.
Would you like to focus on the specific radiographic metrics that help discriminate cranial mediastinal masses from pleural effusion on right lateral thoracic views?