Date: 26 November 2013
Nasal, sinus and orbital aspergillosis in a cat. The left nasal cavity and sinus were full of pus and debris and there was severe bone erosion from the nasal cavity into the rostromedial orbitthrough which pus was protruding
Copyright:
(Kindly provided by Martin L. Whitehead, BSc, PhD, BVSc, CertSAM, MRCVS & Peter W. Kettlewell, BVSc, MSc, MRCVS. Chipping Norton Veterinary Hospital, Albion Street, Chipping Norton, Oxon, OX7 5BN.)
Notes:
History : Nasal aspergillosis is relatively common in dogs but rare in cats. Our veterinary hospital in Oxfordshire was recently presented with a 13-year old female Burmilla cat with a history of left-side unilateral nasal discharge, a watery left eye with slight blepharospasm, occasional ‘twitching movements’ of the head, weight loss, inappetance and depression. Clinical examination was unremarkable except for left-side mucopurulent nasal discharge, left-side mild serous ocular discharge, and a soft subcutaneous swelling over the left frontal sinus. Haematology, blood biochemistry and urinalysis revealed diabetes mellitus but was otherwise unremarkable. Radiography under general anaesthesia revealed a diffuse soft tissue density within the left nasal cavity and left frontal sinus. Rhinoscopy revealed mucopurulent discharge on the left side but was otherwise unremarkable. Aspiration of the swelling over the left frontal sinus produced pus and this abscess was lanced and flushed. The frontal sinus was trephined and the sinus and nasal cavity flushed with saline. Tests for feline immunodeficiency virus and feline leukaemia virus and serology for Aspergillus were not carried out. The cat was started on insulin, ibafloxacin (Ibaflin, Intervet) and meloxicam (Metacam, Boehringer). Cytology of the material flushed from the frontal sinus and nasal cavity revealed fungal hyphae consistent with Aspergillus species and culture of this material yielded growth of a fungus which was morphologically similar to A. candidus (Awaiting molecular typing results). The cat was then started on oral itraconazole (Itrafungol, Janssen) 10 mg/kg p.o. SID. The abscess over the rostral frontal sinus did not heal and a second abscess appeared over the nasal bone just dorsal to the nose. Infusion of the frontal sinus and nasal cavity with topical antifungal medication was discussed with the owners, but as the cat was deteriorating they requested euthanasia. On post-mortem examination the right nasal cavity, frontal sinus and orbit were unaffected. The left nasal cavity and sinus were full of pus and debris and there was severe bone erosion from the nasal cavity into the rostromedial orbit through which pus was protruding. There was also severe bone erosion rostrally through the nasal bone and less severe bone erosion dorsally over the rostral part of the frontal sinus, these sites of bone erosion being at the location of the two subcutaneous abscesses.Feline nasal aspergillosis is extremely rare in the UK and to our knowledge this is the first reported case of orbital aspergillosis in the UK although nasal aspergillosis has been reported in other countries.
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Bilateral Aspergillus osteomyelitis of the base of the skull in a non-immunocompromised woman, aged 38, following Aspergillus sinusitis. This was eventually cured with an 18 month course of voriconazole.
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In this non-immunocompromised patient with histologically and culture proven invasive aspergillosis most of the landmarks have been surgically removed during 3 operations.
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The maxillary sinus on the left is completely opacified with high signal, The high signal seen in the maxillary sinus on the right is of marginal significance. The sinuses and other cerebellum are normal.
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CT scan of the sinuses shows a completely opacified sphenoid sinus in this man with AIDS (Khoo S, Denning DW. Invasive aspergillosis in patients with AIDS Clin Infect Dis 1994; 19 (suppl 1): S41-8.) He had complained of headache for about 3 months before this scan was done. In addition to sinus disease, erosion of disease through the left lateral wall of the sinus into the arterior horn of the temporal lobe, can be seen leading to a cerebral abscess. The patient was treated with itraconazole, but had undetectable serum concentrations because of prior phenytoin, and died after nine days of therapy of an MRSA bacteraemia. He was reported as an “other failure” in Denning DW, Lee JY, Hostetler JS, Pappas P, Kauffman CA, Dewsnup DH, Galgiani JN, Graybill JR, Sugar AM, Catanzaro A, Gallis H, Perfect JR, Dockery B, Dismukes WE, Stevens DA, NIAID Mycoses Study Group multicenter trial of oral itraconazole therapy of invasive aspergillosis. Am J Med 1994; 97: 135-144.
Cultures from the sinus and brain abcess grew A.fumigatus.
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