Maxillary bone cysts in two horses: Diagnosis and treatment including intralesional formalin injection.

Summary: Cystic lesions are not very common in the horse. When occurring in the equine skull, they are mainly located in the paranasal sinuses, but occasionally lesions in the maxillary bone and mandible have been reported. The expansive character of these cystic lesions necessitates surgical treatment. The conventional surgical treatment of cystic lesions usually involves drainage, surgical excision and curettage of the cystic wall and all abnormal tissue. This case report describes the diagnosis and treatment of maxillary bone cysts in two cases. Due to the anatomical location of the bone cysts in the presented cases, excision and extensive curettage would have caused considerable collateral damage to important structures. For this reason, the surgical treatment was performed minimally invasively, including intralesional injection with 10% formalin solution, after which the lesions were flushed with saline solution. [ABSTRACT FROM AUTHOR]