Temporal lobe epilepsy subtypes, differential patterns of cerebral perfusion on ictal SPECT

Purpose: We studied cerebral perfusion patterns in the various subtypes of TLE, as determined by pathology and good outcome after temporal lobectomy (as confirmation of temporal origin). Methods: We studied clinical features and ictal technetium 99m hexamethyl-propyleneamineoxime (Tc-99m-HMPAO) single-photon emission-computed tomography (SPECT) in four subgroups of patients with intractable temporal lobe epilepsy (TLE) treated with surgery: hippocampal sclerosis (group 1, n = 10), foreign-tissue lesion in mesial temporal lobe (group 2, n = 8), foreign-tissue lesion in lateral temporal lobe (group 3, n = 7), and normal temporal lobe tissue with good surgical outcome (group 4, n = 5). Results: No major clinical differences in auras, complex partial seizures ar postictal states were identified among the groups. Ictal SPECT showed distinct patterns of cerebral perfusion in these subtypes of TLE, In groups 1 and 2, hyperperfusion was seen in the ipsilateral mesial and lateral temporal regions. In group 3, hyperperfusion was seen bilaterally in the temporal lobes with predominant changes in the region of the lesion. Hyperperfusion was restricted to the ipsilateral anteromesial temporal region in group 4. Ipsilateral temporal hyperperfusion in mesial onset seizures can be explained by known anatomic projections between mesial structures and ipsilateral temporal neocortex. Bilateral temporal hyperperfusion in lateral onset seizures can be explained by the presence of anterior commissural connections between lateral temporal neocortex and the contralateral amygdala, Conclusions: We conclude that the perfusion patterns seen on ictal SPECT are helpful for subclassification of temporal lobe seizures, whereas clinical features are relatively unhelpful. These perfusion patterns provide an insight into preferential pathways of seizure propagation in the subtypes of TLE

Profiles of psychosocial outcome after epilepsy surgery: The role of personality

C1 - Journal Articles RefereedPURPOSE: We have previously found that the developmental time frame of epilepsy onset influences adult personality traits and subsequent adjustment to intractable seizures. In the same cohort of patients we now investigate the influence of these factors on psychosocial outcome after surgical treatment. METHODS: Fifty-seven adult patients with focal epilepsy were prospectively assessed before and after surgery. Measures of psychosocial outcome included mood, health-related quality of life (HRQOL), and psychosocial adjustment, collected longitudinally at 1-, 3-, and 12-months after surgery. RESULTS: Patients with high neuroticism and low extraversion were predisposed to greater depression after surgery. More than 70% of patients with high neuroticism also reported disrupted family dynamics and difficulties adjusting to seizure freedom. The latter was associated with changes in self-identity that increased over time. Patients with epilepsy onset before or during the self-defining period of adolescence reported the greatest perceived self-change after surgery that had positive effects for HRQOL. DISCUSSION: Psychosocial outcome after epilepsy surgery appears intrinsically linked to a change in self and a transition from chronically sick to well. The development of personality traits and self-identity in the context of habitual seizures can impact psychosocial outcome and the extent of self-change reported after surgery, and paradoxically, can concur more beneficial effects

Ischemic stroke and transient ischemic attack after head and neck radiotherapy: A review

Background and Purpose-Cerebrovascular disease can complicate head and neck radiotherapy and result in transient ischemic attack and ischemic stroke. Although the incidence of radiation vasculopathy is predicted to rise with improvements in median cancer survival, the pathogenesis, natural history, and management of the disease are ill defined