RT Journal Article SR Electronic T1 Ganciclovir concentrations in the cerebral extracellular space after valganciclovir treatment; a case study JF BMJ Case Reports FD BMJ Publishing Group Ltd SP bcr2014207694 DO 10.1136/bcr-2014-207694 VO 2015 A1 Peredo, Inti A1 Helldén, Anders A1 Wolmer-Solberg, Nina A1 Pohanka, Anton A1 Stragliotto, Giuseppe A1 Rahbar, Afsar A1 Ståhle, Lars A1 Bellander, Bo-Michael A1 Söderberg-Nauclér, Cecilia YR 2015 UL http://casereports.bmj.com/content/2015/bcr-2014-207694.abstract AB Nearly all glioblastomas (GBMs), brain tumours with very poor prognosis, are infected with human cytomegalovirus (CMV). The anti-CMV drug valganciclovir (VGCV) has shown promise as a treatment option for patients with GBM, but its penetration into the central nervous system (CNS) is unknown. Here we describe a patient with GMB receiving VGCV in whom an intracerebral microdialysis catheter was implanted and ganciclovir (GCV) concentrations in brain extracellular fluid (BECF) and serum were monitored. GCV was rapidly absorbed. Cmax values (at 3 h) in serum and BECF were 19.6 and 10.2 µmol/L, T½ values were 3.2 and 4.5 h, and plasma and BECF AUC0−∞ values were 90.7 and 75.9 µmol h/L, respectively. Thus, VGCV treatment results in significant intracerebral levels of GCV that may be sufficient for therapeutic effects. Further studies of this drug in patients with GBM are warranted.