AMCA MHTC study guide
AMCA MHTC · Work through your exam, one topic at a time.
The AMCA Medical Histology Technician Certification (MHTC) is a credential offered by the American Medical Certification Association for laboratory professionals who prepare tissue specimens for microscopic examination. It is aimed at histology technicians and technologists, laboratory assistants moving into histology, and students completing a histology or clinical laboratory training program who want a recognized entry-level credential. The AMCA MHTC study guide has 7 sections and about 1,932 words.
01Specimen Collection, Handling, and Fixation
Most errors that ruin a section begin before the microtome is touched. Candidates must know the sequence of events that preserves morphology and antigenicity: rapid excision, immediate immersion in fixative at an adequate volume ratio, and prompt transport.
326 words, about 2 min02Tissue Processing and Embedding
Processing moves tissue from hydrated to paraffin-infiltrated through graded dehydration (ascending alcohols), clearing (xylene or a substitute), and infiltration (paraffin). Each step has a purpose: alcohol removes water, clearing agents are miscible with both alcohol and paraffin, and molten paraffin replaces the clearing agent.
293 words, about 1 min03Microtomy and Section Preparation
Microtomy quality depends on blade angle, clearance angle, block temperature, and section thickness. Routine paraffin sections are typically 3–5 µm; the clearance angle (the gap between blade facet and block) is usually a few degrees and prevents the blade from rubbing.
295 words, about 1 min04Routine and Special Staining
Hematoxylin and eosin is the workhorse stain. Hematoxylin is a basic dye that stains acidic structures (nuclei, nucleic acids) blue-purple; eosin is an acidic dye that stains basic proteins (cytoplasm, collagen) pink.
255 words, about 1 min05Laboratory Safety and Infection Control
Histology labs combine chemical and biological risk. Formalin is a known carcinogen and irritant; xylene is flammable and neurotoxic; both require ventilation (fume hoods), proper labeling, and spill procedures.
240 words, about 1 min06Quality Assurance and Troubleshooting
Quality assurance is the overall system that ensures reliable results; quality control is the specific checks within it (controls, monitoring, records). Candidates should understand that QA includes pre-analytical, analytical, and post-analytical phases, and that documentation is central-if it is not recorded, it did not happen.
278 words, about 1 min07Instrumentation, Reagents, and Maintenance
Candidates should know the purpose and basic maintenance of the tissue processor, embedder, microtome, cryostat, water bath, and stainer. The processor moves tissue through timed stations; its risks are clogged lines, evaporated reagents, and incorrect timing.
245 words, about 1 min