Pathology report of complex breast cyst states "unsatisfactory specimen". what does this mean, and what should happen next?

It means inadequate: This usually implies that the pathologist did not have adequate or good quality material in order to make a diagnosis. This typically means either repeating the test, go seek a second opinion or do a different, more reliable test. Your doctor should guide you further

Poor quality: specimen, or inadequate specimen. For some reason the specimen was not appropriate or adequate for the pathologic evaluation.