A silent invader: asymptomatic Rhodococcus infection unmasked in a patient with ectopic ACTH-dependent Cushing’s syndrome

This case highlights the diagnostic complexity of incidental pulmonary nodules in immunocompromised patients, reinforcing the need for thorough microbiological investigation even in the absence of infection symptoms.It illustrates a rare, asymptomatic presentation of <i>Rhodococcus</i> infection in the context of ectopic ACTH-dependent Cushing's syndrome, a scenario not widely reported in the literature.Practical is given guidance on managing opportunistic infections and evaluating ectopic ACTH sources, aiding internists in navigating similar diagnostic and therapeutic challenges in complex endocrine-infectious overlaps.