Cystic cervical thymoma in a cat
Abstract
A 12‐year‐old, female, neutered Persian cat was presented with a 4‐month history of a progressively enlarging, soft, fluctuating, ventral cervical mass that intermittently caused dysphagia and coughing. Repeated aspiration temporarily reduced the swelling. Computed tomography imaging revealed a large, fluid‐attenuating cervical lesion extending from the larynx to the thoracic inlet, markedly displacing adjacent airway and vascular structures but without evidence of intrathoracic extension or vascular invasion. Ultrasound‐guided aspiration produced sterile, low‐cellularity fluid suggestive of a cystic process. Surgical exploration confirmed a thin‐walled cystic mass closely associated with major cervical neurovascular structures but not infiltrating them, allowing complete en bloc excision. Histopathology diagnosed a cystic cervical thymoma, representing only the second such case reported in cats. Post‐operative recovery was uneventful aside from a transient seroma, managed conservatively. At 147 days post‐surgery, the cat remained clinically well, with no recurrence of swelling, indicating an excellent short‐ to mid‐term outcome following complete surgical excision.
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