Today’s case is a 10 year old male neutered Husky cross with difficulty breathing and cough for a few days. Post your comments below.
There is marked ventral and leftward displacement of the trachea. Both the cranial and caudal mediastinum is widened on the d/v projection.
There is near complete lysis of the right 4th rib, visible on the lateral and v/d projections. The pleura of the right hemithorax appears irregular, resulting in an undulating lung border on that side, overlying the 5th , 6th, and 7th ribs. The 3rd-5th ribs on the right are widened and displaced.
There is moderate pleural effusion and air bronchograms on the left lateral projection, indicating atelectasis or infiltration of the right cranial and right middle lung lobes.
Mediastinal masses, rib mass, possible pleural masses and pleural effusion.
- Osteosarcoma with pleural and mediastinal metastasis
- Histiocytic sarcoma or other round cell neoplasia
- Fungal disease is less likely
CT scan revealed lysis of the right 3rd rib and part of the associated vertebral body, dorsal mediastinal mass with heterogeneous contrast enhancement, multiple pleural nodules, sternal lymphadenopathy, and multifocal pulmonary nodules throughout lungs.
Osteosarcoma was diagnosed by immunohistochemistry.
Case originally posted on November 20, 2008