The value of chest CT in the early diagnosis of mycoplasma pneumonia complicated with streptococcus pneumonia

Abstract

Objective To investigate the value of chest CT in the early diagnosis of mycoplasma pneumonia (MP) complicated with streptococcus pneumonia (SP) in children. Methods Seventy-eight children with pneumonia were selected, among them pneumonia mycoplasma IgM positive but pneumonia streptococcus hemoculture negative was in 45 cases (control group), and pneumonia mycoplasma IgM and pneumonia streptococcus hemoculture positive was in 33 cases (observation group). The chest CT performance was compared between 2 groups. Results The incidences of ground-glass opacity, bronchial wall thickening, branch pipe bundle thickening and reticular shadow in observation group were significantly lower than those in control group: 15.15% (5/33) vs. 73.33% (33/45), 42.42% (14/33) vs. 100.00% (45/45), 33.33% (11/33) vs. 86.67% (39/45) and 36.36% (12/33) vs. 80.00% (36/45), and there were statistical differences (P 0.05). The pleural effusion incidences, pleural effusion thickness and lymph node transverse diameter in observation group were significantly higher than those in control group: 42.42% (14/33) vs. 15.56% (7/45), (13.50 ± 6.81) mm vs. (3.22 ± 1.14) mm and (11.18 ± 2.43) mm vs. (2.91 ± 0.84) mm, and there were statistical differences (P <0.01 or <0.05). The incidences of lymph node shadow in 2 groups were 100.00% (33/33 and 45/45). The incidence of irregular pulmonary real change shadow in observation group was significantly higher than that in control group: 81.82% (27/33) vs. 26.67% (12/45), and there was statistical difference (P<0.01). Conclusions Simple MP and MP complicated with SP in children has different CT manifestations, and the chest CT examination has certain value in the differential diagnosis. Key words: Thorax; Tomography, X-ray computed; Mycoplasma pneumoniae; Streptococcus; Pneumonia