- Ethmoid hematoma
Ethmoid hematoma is a progressive and locally destructive disease of
horse s. It is indicated by a mass in theparanasal sinus es, that resembles atumor but is notneoplastic by any means. The origins and causes of the ethmoid hematoma are generally unknown. Large hematomas usually start within the ethmoid labyrinth, and smaller ones tend to begin on the sinus floor. [cite web | title = Ethmoid Hematoma | work = The Merck Veterinary Manual | date = 2006 | url = http://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/121325.htm | accessdate = 2007-07-10 ]The hematoma usually extends into the nasal passage. A growing hematoma causes pressure
necrosis of the bone surrounding the hematoma, but only on rare occasions does it cause facial distortion. It is most commonly seen in horses older than 6 years. Mild, persistent, spontaneous, intermittent, and unilateralepistaxis is the most common sign clinically.Diagnosis
Diagnosis of the condition is best suited to
endoscopy ; the lesion can be seen extending into the nasal passages on endoscopic examination and can be demonstrated on radiographs. Further elucidation can be obtained withMRI orCT in cases which are more widespread or invasive.Treatment
Treatment most commonly involves the removal of the complete lesion during a single procedure, via the frontonasal bone flaps; recurrence is likely.
Ablation treatment with an looks to be a possibility for permanent removal.There has been some success using intra-lesional injections of
formalin , performed via endoscopy.Prognosis
Prognosis on this condition varies according to extent of the hematoma, but is normally fairly good. Smaller hematoma carry a 99% chance of full recovery, with larger ones carrying a recovery rate ranging from 80 to 90%. Occasional epistaxis may follow the surgery, but this is temporary and should subside within 2 to 3 weeks post-op.
ee also
Equine nasal cysts References
Wikimedia Foundation. 2010.
