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Does Cryofixation of Skin Specimens Affect Quality of Subsequent Formalin Fixed Paraffin Embedded H and E Histology

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
Abramson Cancer Center of the University of Pennsylvania
ClinicalTrials.gov Identifier:
NCT01540695
First received: February 9, 2012
Last updated: October 10, 2014
Last verified: October 2014

February 9, 2012
October 10, 2014
February 2012
January 2013   (final data collection date for primary outcome measure)
Number of Adverse Events [ Designated as safety issue: No ]
Same as current
Complete list of historical versions of study NCT01540695 on ClinicalTrials.gov Archive Site
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Does Cryofixation of Skin Specimens Affect Quality of Subsequent Formalin Fixed Paraffin Embedded H and E Histology
Does Cryofixation of Skin Specimens Affect Quality of Subsequent Formalin Fixed Paraffin Embedded H&E Histology

This prospective study of 60 slides of basal and squamous cell carcinomas of the skin aims to determine whether:

  1. The process of cryofixation prior to generating formalin fixed paraffin embedded (FFPE) H&E sections alters the histology in skin tumor specimens.
  2. Which specific histologic parameters are altered between previously cryofixed versus routine FFPE sections. Histologic observations will be recorded by two dermatopathologists and two Mohs surgeons and statistically analyzed.

Generating formalin fixed paraffin embedded (FFPE) hematoxylin and eosin (H&E) stained permanent sections from previously cryofixed tissue is a common practice used to confirm diagnosis of frozen section histology. In dermatology, this practice can be used to examine Mohs layers and its debulk as well as routine nonmelanoma skin cancer (NMSC) biopsies after initial histologic diagnosis with frozen sections. Even though freezing tissue can introduce histologic artifacts, there have been no studies documenting whether this occurs specifically in cryofixed tissues that are subsequently thawed for permanent FFPE H&E histology. The purpose of our study is to determine whether the freeze-thaw process used to generate permanent sections after cryofixation introduces significantly detectable histologic differences compared to permanent sections that were not previously cryofixed. Thirty debulk specimens of basal cell and squamous cell carcinomas will be prospectively collected. Each specimen will be split so that half is processed as cryofixed permanents and the other half as noncryofixed permanents. The investigator will show each slide in random order to a group of four blinded participants (two dermatopathologists and two Mohs surgeons). Each participant must first rate the overall quality of histology. Then, each participant will rate each slide on the quality of cellular morphology, nuclear morphology, color and contrast of stains, intactness of specimen, and other miscellaneous artifacts. These data will then be analyzed for statistical significance.

Observational
Observational Model: Cohort
Time Perspective: Prospective
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Probability Sample

All patients will be recruited from the Mohs unit of the HUP Department of Dermatology

  • Basal Cell Carcinoma
  • Squamous Cell Carcinoma
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*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Completed
30
January 2013
January 2013   (final data collection date for primary outcome measure)

Inclusion Criteria:

  • Adult patients (age 18 or over) with a biopsy proven routine basal cell or squamous cell carcinoma of the skin who are scheduled for treatment with the Mohs procedure by Dr. Christopher Miller at the University of Pennsylvania's Division of Dermatologic Surgery will be included. Both female and male patients will be included.

Exclusion Criteria:

  • Patients with basal cell or squamous cell carcinomas of more complex histopathology will be excluded from the study. Complex histopathology of a tumor is defined as features with aggressive, moderately to poorly differentiated, or unusual histopathology.
Both
18 Years and older
No
Contact information is only displayed when the study is recruiting subjects
United States
 
NCT01540695
UPCC 25911
Yes
Abramson Cancer Center of the University of Pennsylvania
Abramson Cancer Center of the University of Pennsylvania
Not Provided
Principal Investigator: Christopher Miller, MD Abramson Cancer Center of the University of Pennsylvania
Abramson Cancer Center of the University of Pennsylvania
October 2014

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP