Fungal disease of the Western hemisphere: a patient with coccidioidomycosis.

We report the case of a 58 year old male patient with nonproductive coughing, fever, vomiting and loss of appetite, beginning at the moment that he returned back home from a 2 week holiday in California. His symptoms were accompanied by increased inflammatory markers in his blood (leucocytosis, high CRP) and pulmonary sequelae, becoming more prominent shortly after admission. Eventually, the final diagnosis of coccidioidomycosis was made by histopathology and confirmed by serology. Coccidioidomycosis is a rare infectious disease. However, the incidence in the endemic areas of this fungal infection is increasing and the population travelling towards its specific endemic regions in the United States and Southern America is considerably growing. Clinicians facing patients with pulmonary infection with the appropriate travel history and persistent pulmonary or systemic infection (with or without eosinophilia) should be alert to the possibility of coccidioidomycosis. Therefore, we present an up to date overview of the epidemiology, microbiology, clinical features, diagnosis and treatment of patients with coccidioidomycosis.

Diagnosis of pulmonary embolism with spiral CT as a second procedure following scintigraphy.

Our objective was to evaluate, in a routine clinical setting, the role of spiral CT as a second procedure in patients with clinically suspected pulmonary embolism (PE) and abnormal perfusion scan. We prospectively studied the role of spiral CT in 279 patients suspected of PE. All patients started their diagnostic algorithm with chest radiographs and perfusion scintigraphy. Depending on the results of perfusion scintigraphy, patients proceeded to subsequent levels in the algorithm: stop if perfusion scintigraphy was normal; CT and pulmonary angiography if subsegmental perfusion defects were seen; ventilation scintigraphy followed by CT when segmental perfusion defects were seen; and pulmonary angiography in this last group when results of ventilation/perfusion scintigraphy and CT were incongruent. Reference diagnosis was based on normal perfusion scintigraphy, high probability perfusion/ventilation scintigraphy in combination with abnormal CT, or pulmonary angiography. If PE was present, the largest involved branch was noted on pulmonary angiography, or on spiral CT scan in case of a high-probability ventilation/perfusion scan and a positive CT scan. A distinction was made between embolism in a segmental branch or larger, or subsegmental embolism. Two hundred seventy-nine patients had abnormal scintigraphy. In 27 patients spiral CT and/or pulmonary angiography were non-diagnostic and these were excluded for image analysis. Using spiral CT we correctly identified 117 of 135 patients with PE, and 106 of 117 patients without PE. Sensitivity and specificity was therefore 87 and 91%, respectively. Prevalence of PE was 53%. Positive and negative predictive values were, respectively, 91 and 86%. In the high-probability group, sensitivity and specificity increased to 97 and 100%, respectively, with a prevalence of 90%. In the non-high probability-group sensitivity and specificity decreased to 61 and 89%, respectively, with a prevalence of 25%. In a routine clinical setting single-detector spiral CT technology has limited value as a second diagnostic test because of low added value in patients with a high-probability lung scan and low sensitivity in patients with non-high-probability lung scan result.