title: Toxoplasmic encephalitis in patients with acquired immunodeficiency syndrome--four case reports.
abstract: Four patients, all males aged 40-64 years, presented with toxoplasmic encephalitis associated with human immunodeficiency virus (HIV) infection manifesting as nonspecific neurological deficits such as epilepsy or hemiparesis. Magnetic resonance imaging showed single or multiple lesions with ring enhancement, mimicking metastatic brain tumor or brain abscess. Marked eosinophilia was noted in three patients. Two patients who received anti-toxoplasma chemotherapy in the early stage had a good outcome. However, the other two patients suffered rapid neurological deterioration and needed decompressive surgery, resulting in a poor outcome. Toxoplasma diffusely infects the whole central nervous system from the early stage. The outcome for patients who needed emergency surgery was poor. Therefore, this rare but increasingly common infectious disease must be considered in the differential diagnosis of a patient with neuroimaging findings similar to those of metastatic tumor or brain abscess. Appropriate chemotherapy should be started immediately after HIV-positive reaction is identified in patients with single or multiple mass lesions with ring enhancement.
authors.affiliation: Department of Neurological Surgery, Chiba University School of Medicine.
authors.forename: S
authors.initials: S
authors.lastname: Nakazaki
authors.forename: N
authors.initials: N
authors.lastname: Saeki
authors.forename: S
authors.initials: S
authors.lastname: Itoh
authors.forename: K
authors.initials: K
authors.lastname: Osato
authors.forename: O
authors.initials: O
authors.lastname: Watanabe
authors.forename: N
authors.initials: N
authors.lastname: Hamada
authors.forename: H
authors.initials: H
authors.lastname: Mitsuhashi
authors.forename: H
authors.initials: H
authors.lastname: Shin
authors.forename: I
authors.initials: I
authors.lastname: Kiuchi
authors.forename: C
authors.initials: C
authors.lastname: Kobayashi
authors.forename: A
authors.initials: A
authors.lastname: Yano
authors.forename: A
authors.initials: A
authors.lastname: Yamaura
mesh_terms: D015492:AIDS Serodiagnosis; D017088:AIDS-Related Opportunistic Infections / Q000150:complications / Q000175:diagnosis*; D000328:Adult; D001932:Brain Neoplasms / Q000175:diagnosis; D003937:Diagnosis, Differential; D004660:Encephalitis / Q000469:parasitology; D004827:Epilepsy / Q000469:parasitology; D017809:Fatal Outcome; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010291:Paresis / Q000469:parasitology; D016781:Toxoplasmosis, Cerebral / Q000150:complications / Q000175:diagnosis*; D016896:Treatment Outcome