ONCOLOGÍA (ECUADOR)
Artículo original
DOI : 10.33821/674
Infectología | Cáncer
Oncología (Ecuador) 2023:33(1) 41|
DOI: 10. 33821/674
Abstract
Introduction: The utility of procalcitonin to predict bacteremia in cancer patients with fever has been
reported, but few data exist on the utility of interleukin 6. This study aimed to establish the specificity
and sensitivity of procalcitonin and interleukin in cancer patients with bacteremia and positive blood
culture.
Methods: This cross-sectional study, from a prospective source, was carried out at the Hospital de
SOLCA, Guayaquil. The study period was from January to December 2015. Patients of legal age and
under 65 years of age with a diagnosis of oncological disease with a diagnosis of SIRS, sepsis, or septic
shock were included. The variables were the presence of bacteremia, procalcitonin (PCT), interleukin-6
(IL-6), age, sex, and blood culture report. The sample was non probabilistic. Descriptive and inferential
statistics were used. Two groups were analyzed: the presence and absence of bacteremia, and a diag-
nostic test for procalcitonin and interleukin-6 was performed in each group.
Results: A total of 169 patients participated, 69 with positive blood cultures (G1) and 100 controls without
bacteremia (G2). Procalcitonin was 14.6 in G1 vs 0.54 ng/ml in G2 (
P
=0.0001). IL-6 was 1479.47 ng/ml
in G1 vs 4.37 ng/ml in G2 (
P
< 0.001). The sensitivity (S) of PCT was 81.2%, the specificity (E) was 79%,
and the area under the curve was 0.862. P<0.0001. The S of IL-6 was 98.6%, the E was 95%, and the area
under the curve was 0.996 P<0.0001.
Conclusion: Interleukin-6 is a fairly good test as a predictor of bacteremia in cancer patients due to its
high sensitivity, in the same way it allows establishing bacteremia demonstrated by positive blood cul-
ture due to its high specificity
Keywords:
MESH: Sepsis, Neoplasms, Calcitonin-Related Alpha Polypeptide, Interleukin-6.
DOI: 10.33821/674
Introducción
La sepsis en un paciente oncológico representa un factor de riesgo significativo para el desen-
lace de muerte, por lo que el diagnóstico precoz permite acciones oportunas que reducen la
mortalidad. Un estudio observacional evaluó la utilidad de la procalcitonina (PCT), la interleu-
cina 8 (IL-8), la interleucina 6 (IL-6) y la proteína C reactiva (PCR) en el diagnóstico de bacte-
riemia en pacientes con cáncer y analizó 79 pacientes con fiebre. síndrome, concluyendo que
la procalcitonina tiene mejor sensibilidad y especificidad que las interleucinas y la PCR al
punto que puede aportar más información en el diagnóstico de bacteriemia en pacientes on-
cológicos [1].
La utilidad de la procalcitonina para predecir bacteriemia en pacientes oncológicos con
fiebre ha sido reportada en un estudio previo donde se analizaron 134 pacientes adultos, re-
portando que los niveles de PCT eran más altos en aquellos pacientes con bacteriemia que
en el grupo sin bacteriemia. Se establecieron niveles séricos de PCT de 0.20 ng/ml como
punto de corte, con un valor predictivo negativo del 95.8% para descartar bacteriemia [2].