Coexistent Non–Small Cell Carcinoma and Small Cell Carcinoma in a Patient Presenting with Hyponatremia

<div>Positron emission tomogram showing mild [<svg height="8.43779pt" id="M3" style="vertical-align:-0.04980946pt" version="1.1" viewbox="-0.0498162 -8.38798 19.5292 8.43779" width="19.5292pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M384 0V27C293 34 287 42 287 114V635C232 613 172 594 109 583V559L157 557C201 555 205 550 205 499V114C205 42 199 34 109 27V0H384Z" id="g113-50"></path></g><g transform="matrix(.013,0,0,-0.013,6.24,0)"><path d="M384 0V27C293 34 287 42 287 114V635C232 613 172 594 109 583V559L157 557C201 555 205 550 205 499V114C205 42 199 34 109 27V0H384Z" id="g113-50"></path></g><g transform="matrix(.013,0,0,-0.013,12.527,0)"><path d="M493 503C489 551 484 614 483 650H43V622C120 616 128 611 128 525V126C128 40 120 34 40 28V0H312V28C221 34 213 40 213 126V307H316C407 307 412 296 424 227H453V420H424C412 355 407 346 316 346H213V584C213 613 216 616 246 616H322C398 616 419 607 436 579C449 559 455 539 464 499L493 503Z" id="g121-68"></path></g></svg>]-2-fluoro-2-deoxy-D-glucose (FDG) uptake in the right upper lobe lesion (a) (short white arrow), diagnosed as squamous cell carcinoma on biopsy ((b) hematoxylin and eosin, 40x; (c) CK5 immunostain, 40x). (d) A highly FDG-avid left infrahilar mass (long white arrow) that was diagnosed as small cell carcinoma after biopsy analysis ((e) hematoxylin and eosin, 100x; (f) synaptophysin, 100x).</div>

Case Reports in Pulmonology

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Figure 1

Figure 1: Coexistent Non–Small Cell Carcinoma and Small Cell Carcinoma in a Patient Presenting with Hyponatremia 