Presumed post‐traumatic subdural hygroma in a 2.5‐year‐old spayed female Chihuahua

A 2.5‐year‐old spayed female Chihuahua dog was presented with chronic cervical pain and exhibited a “prayer‐like position” following a history of a 4‐meter fall. CT and MRI revealed a moderate right‐sided enlargement of the subdural space with cerebrospinal fluid, consistent with a subdural hygroma, appearing connected to a quadrigeminal cistern dilation. Percutaneous transfontanellar external drainage of the subdural fluid accumulation did not prevent its re‐accumulation, and the dog was managed medically, leading to the complete resolution of clinical signs. The subdural hygroma was suspected to be secondary to the previous trauma.