A Novel Technique for the Generation of Multitissue Blocks Using a Carrier

Area of Science:

• Surgical Pathology
• Histotechnology
• Biotechnology

Background:

• Multitissue blocks are essential in surgical pathology, including tissue microarrays (TMAs) with numerous small cores.
• Existing methods face challenges with sample orientation and integrity, especially for layered tissues.

Purpose of the Study:

• To develop a novel method for generating multitissue blocks using a carrier tissue scaffold.
• To enhance the precision, versatility, and yield of multitissue block preparation.

Main Methods:

• A carrier tissue (e.g., liver, spleen, lung) is utilized as a scaffold for embedding diverse tissue samples.
• Tissue samples are precisely inserted into the carrier, allowing for customizable block composition and size.
• The assembled carrier-based multitissue block (CBMTB) is re-embedded for sectioning.

Main Results:

• The carrier tissue ensures exact placement and stability of inserted samples, ideal for layered tissues like GIT.
• The method accommodates both large tissue samples and small cores (<1 mm) for classical TMAs.
• Re-embedding and sectioning of CBMTBs are comparable to standard tissue blocks, minimizing sample loss and trimming.

Conclusions:

• Carrier-based multitissue blocks (CBMTBs) offer a versatile and robust approach to multitissue block preparation.
• This method improves sample integrity, orientation control, and sectioning efficiency in surgical pathology.
• CBMTBs enhance the utility of multitissue blocks for various applications, from large samples to high-density TMAs.