[An autopsy case with cerebral histoplasmoma: case report]

Histoplasma capsulatum infection is, for the most part, asymptomatic or of little clinical consequence. Disseminated infection due to H. capsulatum is rather uncommon. Clinically apparent infection of central nervous system (CNS) is rare, and involves in 10 to 50% of patients with disseminated histoplasmosis. Although CNS histoplasmosis is frequently fetal or only discovered as an autopsy, some patients can be effectively treated with anti-fungal agents. We describe a 44-year-old civil man who is engineering contractor with headache without evidence of systemic infection. Magnetic resonance imaging showed enhancing masses in the third and forth ventricles, right interpeduncular cistern, and right cerebello-pontine angle. After biopsy of what was presumed to be a malignant lymphoma, the patient died of rapidly progressive multiple cerebral infarctions. The autopsy revealed the CNS histoplasmoma disseminating systemically. And we finally diagnosed him as histoplasmoma by gene analysis. It was extremely difficult to make a diagnosis based on his physical and radiological findings because it should be included in the differential diagnosis of a well or ring enhanced lesion. It is very important to ask patients about their birthplace, past illness, occupation, and where they had traveled. In the present case, the patient working for the construction has visited many countries including the African Continent and Central America. Clinicians should maintain a high index of suspicion in patients who are from any area endemic for histoplasmosis. The clinical, radiological and pathological features of this infection were reviewed in this report.