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Pathology · USMLE Step 1

USMLE Pathology: Paraneoplastic Syndromes

Classic paraneoplastic syndromes matched to the tumor type that causes them and the underlying mechanism, a cross-cutting oncology concept deck.

30 cards · basic cards · AI-written, checked twice. Edit anything.

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Which lung cancer subtype is most classically associated with SIADH?
Small cell lung carcinoma.
Small cell lung carcinoma causes SIADH by ectopic secretion of ____.
ADH (antidiuretic hormone)
Which lung cancer subtype is most classically associated with ectopic Cushing syndrome?
Small cell lung carcinoma.
Small cell lung carcinoma causes ectopic Cushing syndrome by secreting ____.
ACTH
Which lung cancer subtype most classically causes hypercalcemia of malignancy?
Squamous cell lung carcinoma.
Squamous cell lung carcinoma causes hypercalcemia of malignancy by secreting ____.
PTHrP (parathyroid hormone-related peptide)
How does PTHrP raise serum calcium?
It binds PTH receptors, increasing bone resorption and renal calcium reabsorption.
In multiple myeloma, hypercalcemia results from what mechanism, distinct from PTHrP?
Direct osteolytic bone destruction from cytokine-driven osteoclast activation.
Lambert-Eaton myasthenic syndrome is most strongly associated with which tumor?
Small cell lung carcinoma.
Lambert-Eaton myasthenic syndrome is caused by autoantibodies against presynaptic ____.
voltage-gated calcium channels
Unlike myasthenia gravis, does muscle strength in Lambert-Eaton myasthenic syndrome improve or worsen with repeated stimulation?
Improves with repeated stimulation.
Paraneoplastic cerebellar degeneration with anti-Yo antibodies is most associated with which cancers?
Ovarian and breast cancer.
Anti-Hu antibodies are most classically associated with which tumor?
Small cell lung carcinoma.
What paraneoplastic neurologic syndrome is anti-Hu antibody associated with?
Sensory neuropathy and encephalomyelitis.
Anti-Ri antibodies causing opsoclonus-myoclonus in adults are most associated with which cancers?
Breast and lung cancer.

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