A three-month-old intact female cat was presented with a history of regurgitation. Contrast-enhanced computed tomography revealed a complete vascular ring due to aberrant origin of the right subclavian artery and conjunction of the right subclavian and common carotid arteries, which had caused esophageal stricture with severe dilatation, cranial to the heart base. At eight months old, the cat underwent surgical transection of the aberrant right subclavian artery via a right-sided intercostal thoracotomy. The cat recovered uneventfully and was discharged six days after surgery. Although regurgitation occurred due to trichobezoars requiring removal from the dilated esophagus under endoscopy two months post-surgery, the cat has remained asymptomatic through 12 months post-surgery.

A 3-year and 4-month-old spayed female Doberman Pinscher was referred because of progression of the lameness of right hindlimb. Orthopedic examination revealed decreased range of motion of the hip joint and significant skeletal muscle atrophy in the right gluteal muscle and thigh. Computed tomography revealed a bony mass extending from the ventral side of the right ischium to the posterior side of the right femoral fossa. The DNA testing of type 1 von Willebrand disease revealed no genetic mutations. The bony mass was surgically resected and histologically diagnosed as myositis ossificans. The locomotive function improved dramatically, and no recurrence was observed during the 363 days following surgery.

Malignant tumors arising from thoracic wall may require extensive resection, including ribs. The major complication following rib resection is the development of a flail chest, and resection of more than six ribs is not recommended. We performed a resection with six ribs for a liposarcoma in the thoracic wall of a dog, followed by reconstruction of two cephalic ribs with a titanium plate. There was no postoperative flail chest and the patient’s respiratory status was stable. Rib reconstruction with plates was considered to allow functional reconstruction of the thoracic wall after extensive mass resection.