Ethmoid hematoma 4098644 225153945 2008-07-12T04:33:56Z Alsiola vet 7462918 /* Treatment */ '''Ethmoid hematoma''' is a progressive and locally destructive disease of [[horse]]s. It is indicated by a [[Mass (medicine)|mass]] in the [[paranasal sinus]]es, that resembles a [[tumor]] but is not [[neoplastic]] 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.<ref>{{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 }}</ref> 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 unilateral [[epistaxis]] 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 [[X-ray|radiographs]]. Further elucidation can be obtained with [[MRI]] or [[CT]] 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 [[Nd:YAG laser]] 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. ==See also== [[Equine nasal cysts]] ==References== {{Reflist}} [[Category:Horse diseases]] {{horse-stub}} {{Veterinary-med-stub}}