ORIGINAL ARTICLE
Touch imprint (TI) cytology of needle core biopsies (NCB) in
pathology laboratories: A practice survey of participants in the
College of American Pathologists (CAP) Non Gynecologic
Cytopathology (NGC) Education Program
Vijayalakshmi Padmanabhan MBBS, MD, MPH | Güliz A. Barkan MD |
Laura Tabatabai MD | Rhona Souers MS | Ritu Nayar MD | Barbara A. Crothers DO
Department of Pathology and Immunology,
Baylor College of Medicine, Ben Taub General
Hospital, Houston, Texas
Correspondence
Vijayalakshmi Padmanabhan, Department of
Pathology and Immunology, Baylor College of
Medicine, Ben Taub General Hospital,
Houston, TX 77030.
Emails: vpadmana@bcm.edu;
vijupadmanabhan@gmail.com
Background: Intra-procedural assessment of touch imprint (TI) cytology from needle core biop-
sies (NCB) is used to ensure sample adequacy and to provide immediate diagnosis in various set-
tings. We aimed to survey laboratories for current practices on the use of cytology with NCB.
Methods: A voluntary supplemental questionnaire including questions on demographics, per-
sonnel involved, sites, accessioning, and reporting was sent with the College of American
Pathologists (CAP) 2015 Non gynecologic Cytopathology Education Program to survey practices
of cytologic assessment of NCB.
Results: Among 844 respondents, 403 (48%) performed cytologic assessment of NCB. Com-
mon body sites included lung (94%; 368/392), liver (87%; 340/ 392), and lymph nodes/
spleen (77%; 303/392). Most of the time, a pathologist was present on-site 75% (295/393)
for adequacy assessment which was usually verbally reported to the provider performing
the procedure. Specimens were prepared by cytotechnologists (50%; 193 of 388) or pathol-
ogists (45%; 176 of 388) by touching the core to the slide (50%; 196 of 390) and rolling the
core on the slide (45%; 177/390). Among the respondents, 19% said that cytotechnologists
independently performed immediate assessment of TI of NCB. Most laboratories (69%;
264/384) evaluated air-dried slides with a modified Giemsa stain and rendered one TI/NCB
combined report (87%, 334/385).
Conclusions: This is the first survey performed specifically to determine the practice of ade-
quacy assessment of TI of NCB. Cytotechnologists are generally not performing adequacy
assessment of TI without pathologist oversight. A single report is usually issued which includes
the adequacy assessment as a part of the final report.
KEYWORDS
adequacy assessment, cytology, needle core biopsies, practice patterns, touch imprint
1 | INTRODUCTION
Fine needle aspiration (FNA) cytology
1
is used extensively in routine
practice but less is known about the general practice patterns of usage
of touch imprints (TI) of needle core biopsies (NCB). Intra-procedural
assessment of TI cytology from NCB is often requested to ensure
sample adequacy, provide a preliminary diagnosis, and/or to triage the
specimen for ancillary studies. Gupta and Wang
2
found an increase in
NCB from visceral organs from 5.5% to 31% over 10 y in their institu-
tion. In the era of personalised medicine, it is becoming paramount to
collect samples that will have adequate material for a complete diag-
nosis, which often relies on immunohistochemistry, flow cytometry,
or molecular studies. This study was designed to broadly survey labo-
ratories on their use of TI cytology of NCB.
Received: 30 January 2018 Revised: 29 May 2018 Accepted: 18 June 2018
DOI: 10.1002/dc.24023
Diagnostic Cytopathology. 2018;1–7. wileyonlinelibrary.com/journal/dc © 2018 Wiley Periodicals, Inc. 1