• temporal lobe
  • MR imaging of middle cranial fossa arachnoid cysts: temporal lobe agenesis syndrome revisited. (ajnr.org)
  • Our findings suggest that middle cranial fossa cysts are associated with temporal lobe hypogenesis, and also that compression of the temporal lobe is an infrequent accompaniment. (ajnr.org)
  • The bony wall of the middle cranial fossa has been removed so that the dura mater (9), which encloses the tip of the temporal lobe, is exposed. (stanford.edu)
  • A patient with a cyst on the left middle cranial fossa had auditory hallucinations, migraine-like headaches, and periodic paranoia Patients with left temporal lobe cysts had mood disturbances similar to manic depression (bipolar disorder) and were known to show outward aggression Patients with arachnoid cysts may never show symptoms, even in some cases where the cyst is large The exact cause of arachnoid cysts is not known. (wikipedia.org)
  • In some cases, arachnoid cysts occurring in the middle fossa are accompanied by underdevelopment (hypoplasia) or compression of the temporal lobe. (wikipedia.org)
  • The exact role that temporal lobe abnormalities play in the development of middle fossa arachnoid cysts is unknown. (wikipedia.org)
  • tympanic
  • The mastoid antrum (tympanic antrum, antrum mastoideum, Valsalva's antrum) is an air space in the petrous portion of the temporal bone, communicating posteriorly with the mastoid cells and anteriorly with the epitympanic recess of the middle ear via the aditus to mastoid antrum (entrance to the mastoid antrum). (wikipedia.org)
  • fracture
  • The hematoma may spread downwards and backwards behind the ear, which may be confused with Battle's sign (a sign of a base of skull fracture), although this is an uncommon finding so if present, intra-cranial injury must be ruled out. (wikipedia.org)
  • syndrome
  • On the other hand, a number of symptoms may result from large cysts: Cranial deformation or macrocephaly (enlargement of the head), particularly in children Cysts in the suprasellar region in children have presented as bobbing and nodding of the head called bobble-head doll syndrome. (wikipedia.org)
  • surface
  • Arachnoid cysts are cerebrospinal fluid covered by arachnoidal cells and collagen that may develop between the surface of the brain and the cranial base or on the arachnoid membrane, one of the 3 meningeal layers that cover the brain and the spinal cord. (wikipedia.org)
  • Base
  • contributes to the cranial base. (brainscape.com)
  • Recent reports (9, 12, 17, 24, 32, 34-37) have presented an optimistic outlook for patients harboring this pathological abnormality, but at least one senior neurosurgeon (30) has expressed his reservations concerning the morbidity associated with aggressive surgical treatment of tumors that affect the cranial base. (c3.hu)
  • inner
  • These classification of cysts are embedded in the endoderm (inner layer) and the ectoderm (outer layer) of the cranial or spinal cord germ layers. (wikipedia.org)