A 12-year-old castrated male Chihuahua was referred with a cranial mediastinal mass. The patient had no clinical signs: however, coughing occurred as the mass enlarged over approximately 5 months after the initial evaluation. A medial sternotomy was performed for surgical removal of the mass on the 184th day after the initial evaluation. The mass compressed the cranial vena cava and trachea, and adhered to the surrounding tissues. The mass was isolated, and removed with a part of the left cranial lobe and left phrenic nerve. Necrotic tissues widely occupied the resected mass. A histopathological diagnosis was made as an adenoma of the thyroglossal duct remnants. The clinical signs related to the mass disappeared postoperatively. Adenoma of thyroglossal duct remnants is considered to be included in the differential diagnosis of cranial mediastinal masses in dogs.

We examined a difference of a sterilization effect and the influence on hand skin by methods and pharmaceuticals for surgical hand antisepsis. Regardless of a type of quick-drying hand disinfectant and methods, an obvious sterilization effect was found both immediately and 4 hours after surgical hand washing. The difference of cutaneous moisture retaining property by methods was not found, but foam type pharmaceutical was superior to gel type as of 2 hours after surgical hand washing. We consider that the waterless method using foam type quick-dry hand disinfectant very useful for surgical hand antisepsis from the viewpoint of convenience, cost and influence on skin.

Malignant hyperthermia (MH) is a rare condition that occurs in susceptible patients exposed to triggering anesthetic agents. Clinical signs of MH are increased end-tidal carbon dioxide, tachycardia, arrhythmia, and hyperthermia. As for human medicine, MH is known to be a serious complication of anesthesia in the veterinary field. Although MH requires prompt and proper treatment, clinical reports of MH in veterinary science are limited. We experienced a suspected clinical case of MH in a dog during internal fracture fixation, possibly caused by isoflurane inhalation anesthesia. We describe the case here.