VANILLYL MANDELIC ACID (VMA) (SDL12611)
https://www.scanlabglobal.com/shop/sdl12611-vanillyl-mandelic-acid-vma-sdl12611-7886
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Measures VMA in urine for pheochromocytoma or neuroblastoma. Elevated levels suggest tumor, guiding MIBG scan or surgery.
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