title: Unusual presentations of pleomorphic adenoma and adenoid cystic carcinoma of the lacrimal gland.
abstract: OBJECTIVE
  To report two atypical cases of pleomorphic adenoma and adenoid cystic tumours of the lacrimal gland.
  
  
  METHODS
  Two case reports are presented. The first is of a 65-year-old female with a long history of right hypoglobus with sudden recent worsening. Computed tomography (CT) showed a round, well-defined lesion in the fossa for the lacrimal gland with an anterior hypodense extension suggestive of possible malignancy in a pleomorphic adenoma. The tumour in the second case, a 35-year-old male, was diagnosed after presentation following a relatively minor periorbital injury. The smooth rounded mass on CT scan was suggestive of a benign lacrimal gland tumour.
  
  
  RESULTS
  The lesion in case 1 was excised with a diagnosis of haemorrhage within a pleomorphic adenoma. The lesion in case 2 was excised with a diagnosis of adenoid cystic carcinoma of the lacrimal gland with pseudocapsule.
  
  
  CONCLUSIONS
  Haemorrhagic cyst developing beneath the pseudocapsule of a pleomorphic adenoma should be considered in the differential diagnosis of secondary development of malignancy in a pleomorphic adenoma. Adenoid cystic tumours of the lacrimal gland can present with a pseudocapsule.
authors.affiliation: Royal North Shore Hospital, St Leonards, New South Wales, Australia.
authors.forename: J A
authors.initials: JA
authors.lastname: Wharton
authors.forename: B A
authors.initials: BA
authors.lastname: O'Donnell
mesh_terms: D008949:Adenoma, Pleomorphic / Q000000981:diagnostic imaging* / Q000473:pathology; D000328:Adult; D000368:Aged; D003528:Carcinoma, Adenoid Cystic / Q000000981:diagnostic imaging* / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007766:Lacrimal Apparatus Diseases / Q000000981:diagnostic imaging* / Q000473:pathology; D008297:Male; D009915:Orbit / Q000000981:diagnostic imaging / Q000293:injuries; D014057:Tomography, X-Ray Computed; D014949:Wounds, Nonpenetrating / Q000000981:diagnostic imaging