Retrospective study links infections and outcome risks in Good syndrome

A retrospective analysis of patients with Good syndrome found that respiratory infections were the most common infectious complication, while cytomegalovirus was the most frequently reported virus and longer corticosteroid use before infection was associated with a poorer outcome. The study reviewed clinical records from Peking Union Medical College Hospital from January 2015 through December 2024, documenting infections, immune abnormalities, management and prognosis in this rare combined immunodeficiency. Good syndrome is characterized by thymoma, hypogammaglobulinemia and opportunistic infections.

The analyzed patients had a mean age of 57.8 years at diagnosis, with a standard deviation of 9.3 years, and 37% were male. AB-type thymoma was the most prevalent subtype, reported in 47.6% of cases. All patients experienced infectious disease during follow-up, and respiratory infections represented 88.9% of the reported infectious complications.

The reported organisms spanned bacterial, fungal and viral infections. Pseudomonas aeruginosa was the most common bacterium, reported in 22.2% of the cohort; Candida species were the most common fungi, reported in 44.4%; and cytomegalovirus, or CMV, was the most common virus, reported in 55.6%. The abstract does not specify whether these pathogen percentages represent patients, infection episodes or another denominator, so their precise interpretation remains limited.

Beyond infection, 44.4% of patients had autoimmune diseases and 7.4% had another malignancy concurrently. Radiotherapy or chemotherapy for thymoma was administered to 25.9% of the cohort. These findings show that infectious disease occurred alongside other immune, malignant and cancer-treatment-related features rather than appearing as an isolated complication in the analyzed records.

Cox proportional hazards regression identified two factors associated with outcome. Older age at onset was associated with a higher hazard in the model, with a hazard ratio of 1.270 per year, a 95% confidence interval of 1.042 to 1.548 and a reported P value of 0.018. Each additional day of corticosteroid use before infection was also associated with a higher hazard, with a hazard ratio of 1.049, a 95% confidence interval of 1.004 to 1.095 and a reported P value of 0.033.

These retrospective associations do not establish that age or corticosteroid exposure caused the outcome, and the supplied abstract does not define the precise outcome measure. Cluster analysis stratified the patients into five subgroups based on immunodeficiency profiles. CMV infection was associated with cellular immune deficiency at a reported P value of 0.001, while elevated C-reactive protein levels correlated with phagocytic immune deficiency at P = 0.03.

Separately, intensive care unit admission was linked to corticosteroid use before infection and reduced lymphocyte counts at P = 0.02. These were distinct reported model and correlation findings, not evidence of a combined association among age, steroid exposure and lymphocyte abnormalities. The results also indicate that people with Good syndrome in this cohort experienced varied infectious presentations rather than a single uniform pattern.

Respiratory disease predominated, but bacterial, fungal and viral pathogens were all documented, and the immune profiles differed across the five clusters. CMV was associated with cellular immune deficiency, whereas elevated C-reactive protein correlated with phagocytic immune deficiency, showing that infection and laboratory findings could be linked in different ways. The findings should be interpreted within the study’s retrospective, single-hospital design.

The results therefore describe the analyzed hospital cohort rather than establishing population-wide frequencies or causal effects. Within those limits, the study reports respiratory infection as the dominant infectious problem, Pseudomonas aeruginosa, Candida and CMV as the leading organisms in their respective categories, and age at onset and pre-infection corticosteroid duration as factors associated with outcome. The authors concluded that corticosteroid administration before infection onset may correlate with an unfavorable outcome in Good syndrome patients complicated by infectious disease.

Subject of Research: Infectious complications, immune profiles and outcome risk in people with Good syndrome

Article Title: Clinical characteristics and outcomes in good syndrome patients with infectious complications: a retrospective analysis

Article References: Chen, Q., Chen, R., Shi, Y., Wang, S., Li, Z., Zhang, Y., Shao, C., & Huang, H. (2026). Clinical characteristics and outcomes in good syndrome patients with infectious complications: a retrospective analysis. BMC Infectious Diseases. https://doi.org/10.1186/s12879-026-14632-5

Image Credits: AI Generated

DOI: 10.1186/s12879-026-14632-5

Keywords: Good syndrome, combined immunodeficiency, respiratory infections, cytomegalovirus, Pseudomonas aeruginosa, Candida, corticosteroids, thymoma, retrospective study, clinical outcomes, Clinical, characteristics