Evaluating Suspected LEMS: Differential Diagnosis and Palliative Care's Role

In "Evaluating Suspected LEMS: Differential Diagnosis and Palliative Care's Role," the panel examines how to evaluate a patient once LEMS enters the differential.

Dr. Patel opens with a simple premise: if clinicians do not think about LEMS, they will not test for it or diagnose it, and they risk missing an opportunity to help the patient. He notes that small cell lung cancer (SCLC) gets treated the same way regardless of a LEMS diagnosis, since the underlying malignancy is the primary driver of both conditions. Even so, he argues it remains important to recognize a paraneoplastic autoimmune phenomenon when one exists, particularly because immunotherapy used to fight the cancer could potentiate the autoimmune process and needs closer monitoring. Thinking about LEMS more, he explains, leads directly to testing for it more and ultimately finding more cases that would otherwise go undiagnosed. Dr. Iams then raises whether palliative care has a role as an adjunct for these patients. Dr. Patel agrees strongly, describing palliative care as valuable holistically, regardless of whether a patient has LEMS, because any cancer diagnosis benefits from support beyond pain management alone. He describes palliative care's scope as physical, emotional, and mental, built around early and ongoing goals-of-care conversations with patients. He adds that palliative care teams bring another set of eyes to the case, and would not be surprised if a palliative care colleague suspected LEMS before he did. Dr. Iams agrees completely, observing that oncologists are often consumed by getting the cancer treatment regimen right, which can push a secondary diagnosis like LEMS to the side. He suggests that partnering with supportive care lines creates a natural opportunity to think through a potential LEMS diagnosis that might otherwise be overlooked amid the broader workflow of managing small cell lung cancer.

The next episode in this series, "LEMS Natural History: Recognizing Symptoms Before a Small Cell Diagnosis,"features Dr. Patel and Dr. Iams unpacking why LEMS symptoms may surface before the cancer diagnosis itself.