ASCP HTL case studies
ASCP HTL · Put your knowledge to work in context.
The ASCP Histotechnologist (HTL) credential is a professional certification for laboratory professionals who prepare tissue for microscopic diagnosis - fixing, processing, embedding, sectioning, and staining specimens so that a pathologist can render an accurate interpretation. It is intended for histotechnology practitioners who have completed the required education and clinical training and who want an objective, third-party validation of their technical competence, and it is commonly listed as a preferred or required qualification in anatomic pathology laboratory job postings. The ASCP HTL case studies are 5 cases and about 4,035 words.
1Swiss-Cheese Cores in an Overnight Run: Fixation or Processing?
A 61-year-old woman has a 1.3 cm spiculated mass in the right breast. Six 18-gauge core biopsies (each roughly 1 mm x 12 mm) are placed together in one cassette and processed overnight: 10% NBF 45 minutes, graded ethanols, three xylene stations, three paraffin stations at 62 C.
812 words, about 4 min2Gray Nuclei and Harsh Eosin on a 260-Slide Line
A hospital laboratory stains about 260 H&E slides per day on a linear stainer: Gill II hematoxylin, 1% eosin Y with phloxine, and a running tap-water blueing station. Over 10 days pathologists report that nuclei in renal and prostate biopsies look gray-blue and washed out, while eosin looks harsh and muddy in smooth muscle and colon.
788 words, about 4 min3Trichrome and Iron in a Four-Day-Old Unbuffered Specimen
A 54-year-old man with elevated liver enzymes has a 1.6 cm liver core biopsy. It arrives from an outside clinic in a 30 mL container of formalin that the requisition describes as 'unbuffered, prepared in-house,' drawn 4 days ago.
764 words, about 4 min4Edge-Only 3+ HER2 With a Failing On-Slide Control
A 47-year-old woman's 1.1 cm breast core biopsy is stained for HER2. The invasive carcinoma shows strong, complete membrane staining (3+) confined to the tumor at the tissue edge nearest the ink; the same tumor in the center of the section is 1+.
871 words, about 4 min5A Friday-Afternoon Fragment: Frozen Section Versus PD-L1 and NGS
A 68-year-old man has a 2.4 cm right upper lobe lung nodule. The radiologist sends a single 0.5 cm fresh tissue fragment in 20 mL of normal saline on ice, arriving in histology at 3:40 pm on a Friday.
800 words, about 4 min