10 free HT (ASCP) practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
HT (ASCP) Practice Test 12Tutor mode
Question 1 of 10
Staining
A breast core with mammographic calcifications was fixed in 10% NBF. Because the block was gritty, its face was treated with a formic acid decalcifier before sectioning. A von Kossa stain shows no black deposits, while the control in the same run is strongly positive. What is the most likely explanation?