Kartagener syndrome combined with small cell lung cancer: A case report and literature review.

Kartagener syndrome (KS) is a rare autosomal recessive genetic disease characterized by visceral inversion, sinusitis and bronchiectasis. Small-cell lung cancer, a common tumor with poor prognosis, rarely coexists with KS. The lack of typical clinical symptoms can lead to missed or incorrect diagnoses, and to date, only few cases of this combination have been reported. The current study presents a case of KS with small cell lung cancer that was promptly diagnosed and treated at Jining No. 1 People's Hospital (Jining, China). Sharing this case may contribute to the advancement of respiratory medicine and aid doctors in the diagnosis and management of similar conditions.