title: An unusual case of anisocoria in a child with bleeding aneurysm of posterior communicating artery and idiopathic thrombocytopenic purpura (ITP).
abstract: BACKGROUND
  ITP can give rise to bleeding episodes in different parts of the body including the central nervous system with various systemic manifestations.
  
  
  METHODS
  An eight-year old female child, diagnosed as a case of chronic ITP for last two years, developed intense headache and vomiting for a few days before admission. This was associated with right sided mid dilated pupil with brisk reaction to light. MRI-angiography showed a bleeding aneurysm of posterior communicating artery. The features of raised intra cranial tension subsided with conservative management but the anisocoria persisted.
  
  
  CONCLUSIONS
  A bleeding aneurysm can manifest with anisocoria as a sign of partial third cranial nerve palsy.
authors.affiliation: Calcutta National Medical College, Kolkata, West Bengal, India.
authors.forename: N C
authors.initials: NC
authors.lastname: Mahapatra
authors.forename: A
authors.initials: A
authors.lastname: Bandyopadhyay
authors.forename: S K
authors.initials: SK
authors.lastname: Samanta
authors.forename: S
authors.initials: S
authors.lastname: Dolui
authors.forename: K
authors.initials: K
authors.lastname: Fariduddin
mesh_terms: D015875:Anisocoria / Q000175:diagnosis / Q000209:etiology*; D002543:Cerebral Hemorrhage / Q000175:diagnosis / Q000209:etiology*; D002648:Child; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000150:complications* / Q000175:diagnosis; D015840:Oculomotor Nerve Diseases / Q000175:diagnosis / Q000209:etiology*; D016553:Purpura, Thrombocytopenic, Idiopathic / Q000150:complications*