Paraneoplastic neurological syndrome with Guillain–Barré syndrome overlap in small-cell lung carcinoma: A case report from a primary care hospital in China

For patients with subacute neuropathy and unexplained weight loss in primary care settings, routine paraneoplastic antibody testing and whole-body imaging (e.g., positron emission tomography-computed tomography) are essential to facilitate early recognition of PNS-GBS overlap syndromes. Multidisciplinary collaboration across neurology, oncology, and radiology is key to timely management and improved prognosis in resource-limited healthcare environments, even in the absence of classic disease phenotypes.