A 7-year-old, castrated male domestic short-haired cat was referred to the Maizuru Animal Medical Center with dysuria which was difficult to express, and a flaccid tail. Computed tomography (CT) revealed a cystic structure in the spinal canal between L5 and L6 vertebrae. The structure contained hyperattenuated spots scattered in heterogeneously hypoattenuated areas. The structure compressing the spinal cord dorsally was found by performing hemilaminectomy between L5 and L6 vertebrae. An attempt to remove it resulted in rupture of the capsule, and spinal canal became filled with bloody fluid. After suctioning the fluid, disc materials were also removed from the same site. These surgical findings suggested that epidural hematoma associated with disc extrusion had occurred. To the authors’ knowledge, this is the first feline case of epidural hematoma caused by intervertebral disc extrusion, and distinctive CT findings different from previously reported in dogs were noted. In this case, the site of spinal cord lesion estimated by dysuria not easily expressed differed from the actual site, which may occasionally occur, especially in feline spinal diseases.

A-4-year-old French bulldog presented with swelling of the body surface lymph nodes. Following pathological examination, a diagnosis of diffuse small B-cell lymphoma (DSBCL) was made. Chemotherapy with the CHOP protocol showed good response, archieving complete remission. However, lymphoma recurred later, and the dog died on the 489th day of illness. DSBCL is a disease that should be clinically treated as high-grade lymphoma.

A 2-year-old intact female mixed-breed cat was referred for confirmation and treatment of a traumatic diaphragmatic hernia. Thoracic radiography revealed the prolapse of abdominal organs such as the gastrointestinal tract and liver into the thoracic cavity, and since the cardiac shadow was unclear, a diagnosis of traumatic diaphragmatic hernia was made and reduction of the herniated organs and closure of the diaphragm through a midline abdominal incision were thus performed. After completing the herniated organs reduction during surgery, the peristaltic movements of the intestinal tract and pulsation of the blood vessels were diminished, and the intestines appeared pale. Subsequently, acute hypotension and tachycardia occurred. Fluid boluses of crystalloids and colloids, dopamine, norepinephrine, vasopressin and whole blood were administered for the treatment of hypotension, with no improvement. Postoperatively, the serum lactate levels gradually increased, and hyperkalemia, hypoglycemia and hypercapnia occurred. Catecholamine-resistant circulation insufficiency persisted, and the cat died approximately 9 hours after surgery. Careful perioperative management is required because refractory perioperative hypotension, hyperlactatemia, hyperkalemia and hyperlactatemia may occur after reduction of a traumatic diaphragmatic hernia.