Hi i was wondering if a fna biopsy is really accurate in diagnosing cancer or if it misses cancer cells? should i get a second opinion? thanks

May be accurate: FNA is an aspiration of cells from a lesion or lymph node. It may reveal cells characteristic of malignancy but does not show architectural structure to help define the tumor. Its like looking at bricks from a building and trying to tell what the name of the building is. A true cut needle gives more information but a formal biopsy is the best way to make the dx of a lesion.

Yes: Though may vary depending on the tissue sample obtained and pathologist experience with the cytology of the particular cancer especially in rare malignancy. Hence getting a second opinion is reasonable