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'''A 12-year-old pony gelding is presented with a three week history of weight loss, inappetence, intermittent fever (up to 38.7°C) and ventral thoracic and abdominal oedema. Auscultation of the chest reveals bilateral absence of ventral lung sounds, and a pleural effusion is confirmed by ultrasonography. Thoracocentesis yields a large volume of blood-stained watery fluid. A tracheal wash did not reveal any any infectious cause.'''

'''A 12-year-old pony gelding is presented with a three week history of weight loss, inappetence, intermittent fever (up to 38.7°C) and ventral thoracic and abdominal oedema. Auscultation of the chest reveals bilateral absence of ventral lung sounds, and a pleural effusion is confirmed by ultrasonography. Thoracocentesis yields a large volume of blood-stained watery fluid. A tracheal wash did not reveal any infectious cause.'''

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|a1=Thoracic neoplasia. <br>

|a1=Thoracic neoplasia. <br>

The commonest type of thoracic neoplasia in the horse is mediastinal lymphosarcoma.

The commonest type of thoracic neoplasia in the horse is mediastinal lymphosarcoma.

|l1=Pulmonary Neoplasia#Metastatic tumours

|l1=Lymphoma

|q2=How can the diagnosis be confirmed?

|q2=How can the diagnosis be confirmed?

|a2=

|a2=

*Mediastinal masses may sometimes extend through the thoracic inlet and be palpable externally at the base of the jugular groove; in this situation they may be amenable to biopsy.  

*Mediastinal masses may sometimes extend through the thoracic inlet and be palpable externally at the base of the jugular groove; in this situation they may be amenable to biopsy.  

*In the case of lymphosarcoma, peripheral lymph nodes may be enlarged due to neoplastic infiltration, and these may be biopsied.

*In the case of lymphosarcoma, peripheral lymph nodes may be enlarged due to neoplastic infiltration, and these may be biopsied.

|l2=Cytology Q&A 3

|l2=Thoracocentesis#Equine Thoracocentesis

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