Benign cranial mediastinal lesions in three cats

R. Malik, L. Gabor, Geraldine B Hunt, D. B. Church, V. R. Barrs, R. Churcher, R. T. Dixon, C. Huxley, P. J. Canfield

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


Cranial mediastinal lesions were detected in three cats, associated with respiratory impairment (case one), spontaneous pneumothorax (case two) and myasthenia gravis (case three), respectively. On gross and histological examination, the first case was considered either a lymphangioma or a branchial cystic mass of the thymic region of the mediastinum; a cystic lesion was suggested by sonographic detection of multiple anechoic cavitations within a circumscribed mass, while fine needle aspiration cytology excluded lymphosarcoma. The second case was diagnosed histologically as a cystic thymoma, but the third case was not examined microscopically. The masses were amenable to surgical excision in the first two cats, while this proved unnecessary in the third case because of resolution following treatment with dexamethasone. Corticosteroid responsiveness was unhelpful in distinguishing between these benign lesions and lymphosarcoma, as in two cases there was a partial or complete response to dosing with prednisolone or dexamethasone. These cases are presented to emphasise that conditions other than lymphosarcoma can produce cranial mediastinal lesions in cats, and that the prognosis for surgical treatment of lymphangiomas, multilocular thymic cysts and cystic thymomas can be excellent.

Original languageEnglish (US)
Pages (from-to)183-187
Number of pages5
JournalAustralian Veterinary Journal
Issue number3
StatePublished - Mar 1997
Externally publishedYes


  • Cat
  • Lymphangioma
  • Mediastinal cyst
  • Mediastinal mass
  • Thymic brachial cyst
  • Thymoma

ASJC Scopus subject areas

  • veterinary(all)


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