[Importance of images and etiological diagnosis in immunocompromised patients with central nervous system involvement. Third part].

A twenty four year-old male patient with a history of morbid obesity and acute lymphocytic leukemia diagnosed in 2003, underwent an autologous bone marrow transplantation the same year. He had two relapses of leukemia on 2003 and 2007. On January 2009, he underwent a double cord bone marrow transplantation with myeloablative conditioning and craneospinal radiotherapy. The patient received prophylaxis with aciclovir, cotrimoxazole and fluconazole. The latter was changed afterwards to posaconazole. On day 16 post-transplantation, fever and meningeal signs appeared. The cerebrospinal fluid exam revealed pleocytosis with polymorphonuclear predominance. Empirical therapy was started with meropenem. Due to neurological impairment, at day 33, a brain magnetic resonance imaging (MRI) was performed, showing multiple hypodense supra and infratentorial nodules with peripheral edema. Biopsy, universal PCR for fungi and a new cerebrospinal fluid analysis were performed and amphotericin B was added showing a favorable response. He was discharged with itraconazole, as the universal PCR of brain tissue revealed Penicillium spp. This is the third report presented in this journal that stresses the importance of early neuroimaging, especially MRI to certify the involvement of the central nervous system in immunocompromised patients.