RESUMO
We describe a patient who presented with neurological symptoms and radiological findings consistent with metastatic malignancy in several sites. However, no obvious primary site of tumour was identified and the patient later went on to develop clinical features of sepsis whilst using palliative dexamethasone therapy. A diagnosis of actinomycosis was eventually made on open lung biopsy and the patient recovered completely on penicillin V. This case serves to illustrate the need to obtain a formal tissue diagnosis whenever possible in all cases of suspected malignancy, in addition to exposing the weaknesses inherent in empiric diagnoses.
Assuntos
Actinomicose/diagnóstico , Metástase Neoplásica/diagnóstico , Actinomicose/patologia , Encéfalo/microbiologia , Encéfalo/patologia , Neoplasias Encefálicas/diagnóstico , Neoplasias Encefálicas/patologia , Diagnóstico Diferencial , Feminino , Arterite de Células Gigantes/diagnóstico , Humanos , Pulmão/patologia , Neoplasias Pulmonares/diagnóstico , Neoplasias Pulmonares/patologia , Pessoa de Meia-Idade , Metástase Neoplásica/patologiaRESUMO
Exercise-induced bronchospasm (EIB) is widely used in epidemiological studies to investigate the prevalence of asthma. We aimed to determine seasonal variations in the prevalence of EIB in Ghanaian school children from urban-rich (UR), urban-poor (UP), and rural (R) schools. We have previously reported the prevalence of EIB in 9-16-year-old children to be 3.1% in the dry season, with UR children having a significantly higher prevalence of both EIB and atopy compared to UP or R children. In the current study, the prevalence of EIB was assessed in the same 1,095 children in the wet season (5 months following the initial study) using the same methodology. Exercise provocation consisted of free running outdoors for 6 min. In the wet season, 17/1,095 children [mean 1.55%, 95% confidence interval (CI): 0.91-2.47] had a positive response to exercise, compared to our previous report of 34 children (mean 3.1%, 95% CI: 2.15-4.32) with EIB in the dry season (dry vs. wet season, difference 1.55, 95% CI: 0.41-2.69). The proportion of children with a positive response to exercise in the UR school fell from 4.2% (25/599) to 1.3% (8/599) (difference 2.9, 95% CI: 1.2-4.5). In the wet season, there was no difference in the prevalence of EIB among the UR, UP, and R children. Only five of 1,095 subjects (mean 0.5%, 95% CI: 0.15-1.07) demonstrated EIB in both seasons. In conclusion, although exercise challenge remains a useful tool for determining asthma prevalence in epidemiological studies, seasonal variations in the pattern of responses may occur and the results should be interpreted with caution.
