| Clinical Presentation | Frequently Associated Neoplasms | Etiology |
|---|---|---|
| Cushing syndrome | Small cell lung cancer Pancreatic cancer |
Ectopic ACTH / CRH |
| SIADH | Small cell lung cancer | Ectopic vasopressin |
| Subacute cerebellar degeneration | Small cell lung cancer Breast, Ovarian, Uterine cancer |
Anti-Yo, anti-P/Q & anti-Hu antibodies |
| Lambert–Eaton myasthenic syndrome | Small cell lung cancer | Voltage-gated calcium channel antibodies |
| Myasthenia gravis | Thymoma | Acetylcholine receptor antibodies |
| Hypercalcemia | Squamous cell lung cancer | Ectopic PTHrP |
| Dermatomyositis/polymyositis | Variable (Lung, Breast, GI) | Autoimmune |
| Erythrocytosis | Renal cell cancer | Ectopic erythropoietin |