Formalin-fixed tissue is not suitable for which intraoperative evaluation?

Prepare for the CAMLPR Specimen Collection Competency Test. Practice with diverse question sets including multiple-choice and flashcards. Each question includes hints and explanations to help you become proficient before the exam.

The test is asking about what kind of intraoperative evaluation cannot be done on tissue fixed in formalin. Electron microscopy requires pristine ultrastructural preservation and a specialized, time‑consuming preparation process (typically fixation with glutaraldehyde, post‑fixation with osmium tetroxide, dehydration, resin embedding, ultrathin sectioning, and heavy metal staining). Formalin fixes tissues by cross‑linking proteins, which preserves overall morphology for light microscopy but disrupts and obscures ultrastructural detail and interferes with the rapid prep required for EM. Because of both the need for unfixed, specifically prepared tissue and the lengthy processing time, formalin‑fixed tissue is not suitable for intraoperative electron microscopy.