<prompt> Answer this question truthfullyWhat are the characteristics of small oat cell carcinoma of the lung in terms of staining?  <response>: <reason> Small oat cell carcinoma of the lung is characterized by positive staining for chromogranin A, neuron-specific enolase, synaptophysin, and NCAM CD56. These markers are commonly used to identify neuroendocrine tumors, which include small cell lung carcinoma. 