Abstract:
:Although the existence of subclinical Pneumocystis carinii infection in pediatric patients with solid tumors or hematologic malignancies has been documented, similar data are lacking in adults. In addition, data are needed to define the epidemiology of this agent in adult malignancies to assess the validity of the methodology employed in antigen detection, and to elucidate the value of these methods in the diagnosis, prophylaxis, and prognosis of P carinii infection in adults with cancer. The study was designed to determine the incidence of P carinii antigenemia in ambulatory patients with solid tumors or hematologic malignancies. The authors also sought to determine if antigenemia as detected by a counterimmunoelectrophoresis test correlated with any clinical parameter. Patients included in the study were ambulatory, asymptomatic, afebrile, adult cancer patients seen in the clinic for follow-up or treatment. Coded sera were electrophoresed against high-titered rabbit antiserum to P carinii organisms. Two hundred forty-seven patients were studied, including 172 hematologic malignancies (average age, 57 years), 109 men and 63 women; 75 solid tumors (average age, 55 years), 39 women and 36 men. One hundred three healthy adults served as controls. Only five patients had positive antigen (2%). All of these patients had hematologic malignancies and were women. None of the control sera were antigen-positive. We conclude that the incidence of P carinii antigenemia in asymptomatic adults with neoplastic disease is extremely low. A positive P carinii antigen in the absence of clinical symptoms most likely represents subclinical infection. Positive antigen does not always indicate active disease, but probably reflects mobilization of antigen during generalized inflammatory response or possible pulmonary insult. In making the decision to treat consideration should be given to clinical presentation and history.
journal_name
Cancerjournal_title
Cancerauthors
Robert NJ,Pifer LL,Niell HB,Woods DR,Neely CL,Miller JH,Churchill Hdoi
10.1002/1097-0142(19840501)53:9<1878::aid-cncr2820subject
Has Abstractpub_date
1984-05-01 00:00:00pages
1878-81issue
9eissn
0008-543Xissn
1097-0142journal_volume
53pub_type
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