An endoscopy is part of having a triple scope or pandendiscopy, except three places are examined. I wouldn't say there is a compete test, it's all done in steps to help identify the cause, and proceed along the way to gather facts, suspicions at each step, like a visual and palpable exam first, an office flex scope or larygnoscope, a round of antibiotics, a CT scan, PET/CT, FNA if possible, endoscopy with biopsy, possibly with surgery, etc are all possibilities, but that's jumping far ahead, and most times it's something minor, and not cancer, which is not that common anyway compared to other type cancers. Take one step at a time, and it's not cancer until proven, and only a biopsy can do that, no scan can, but are all clinical diagnostic tools, like the others, and combined may help with a diagnosis.