Histopathology Flashcards
Deals with processing and preparation of tissue and cell samples for microscopic examination by the pathologist
Histopathology
What profession is responsible in the Histopathology section?
Pathologist
Who & what contributed to the history of Histopathology?
Johannes Muller
Marcello Malphigi
Rudolf Virchow
Ferdinand Blum
Invention of Microtomes
“Father of Histopathology” / “Father of Histologic Pathology”
Johannes Muller
Authored the book “Elements of Physiology” which became the leading textbook in physiology for much of the nineteenth century
Johannes Muller
Johannes Muller authored the book ____________ which became the leading textbook in physiology for much of the nineteenth century
Elements of Physiology
“Founder of Pathology”/ “Father of Modern Anatomic Pathology”
Marcello Malphigi
Became renowned for his exploration of embryology and physiology of the glands and the viscera
Marcello Malphigi
Marcello Malphigi became renowned for his exploration of?
Embryology and Physiology of the glands and the viscera
Used different methods of fixation, one of which is heat fixation, to preserve tissues and other samples
Marcello Malphigi
What fixation did Malphigi utilized to preserve tissue samples
Heat fixation
“Founder of Pathology”/ “Father of Modern Anatomic Pathology”
Became renowned for his exploration of embryology and physiology of the glands and the viscera
Used different methods of fixation (discussed below), one of which is heat fixation, to preserve tissues and
other samples
Marcello Malphigi
“Father of microscopic pathology”
Rudolf Virchow
Credited to have established the world’s first pathology laboratory
Rudolf Virchow
Rudolph Virchow is credited to have established the world’s first ______?
pathology laboratory
Was the first scientist/ physician of the time who emphasized the study of the manifestation of diseases and infections, which are visible at the cellular level by means of a microscope
Rudolf Virchow
“Father of microscopic pathology”
Credited to have established the world’s first pathology laboratory
Was the first scientist/ physician of the time who emphasized the study of the manifestation of diseases and infections, which are visible at the cellular level by means of a microscope
Rudolf Virchow
Discovered the fixative effects of formaldehyde
Ferdinand Blum
Blum discovered the fixative effects of?
Formaldehyde
A machine used for cutting tissue blocks into thin slices called ribbons/ sections
Microtome
Microtome is a machine used for cutting tissue blocks into thin slices called
ribbons/ sections
4 types of Microtomes
Sliding Microtome
Rocking/ Cambridge Microtome
Minot/ Rotary Microtome
Freezing Microtome
Invented by George Adams Jr. in 1798
Sliding Microtome
Invented by Paldwell Trefall in 1881
Rocking/ Cambridge Microtome
Invented by Minot in 1885-1886
Minot/ Rotary Microtome
Invented by Queckett in 1848
Freezing Microtome
Routine Process of the Histopathologic Examination
Routine Process:
SAMPLE
a.) Fixation
b.) Dehydration
c.) Clearing
d.) Infiltration
e.) Embedding
TISSUE/ CELL BLOCK
f.) Trimming
g.) Sectioning
SECTIONS/ RIBBONS
h.) Staining
i.) Mounting
PREPARED SLIDE FOR MICROSCOPIC EXAMINATION BY PATHOLOGIST
What is the 1st process of the sample in routine histopathologic examination?
Fixation
What is the 2nd process of the sample in routine histopathologic examination?
Dehydration
What is the 3rd process of the sample in routine histopathologic examination?
Clearing
What is the 4th process of the sample in routine histopathologic examination?
Infiltration
What is the 5th process of the sample in routine histopathologic examination?
Embedding
After Embedding what would happen to the sample?
Tissue/ Cell Block
What is the 6th process of the tissue/ cell block in routine histopathologic examination?
Trimming
What is the 7th process of the tissue/ cell block in routine histopathologic examination?
Sectioning
After Sectioning what would happen to the tissue/cell block
Sections/ ribbons
What is the 8th process of the section/ ribbon in routine histopathologic examination?
Staining
What is the 9th process of the tissue/ cell block in routine histopathologic examination?
Mounting
After Mounting what will be done to the sections/ ribbons?
PREPARATION OF SLIDE FOR MICROSCOPIC
EXAMINATION BY PATHOLOGIST
Preserving the tissue specimen in as life-like a manner as possible
Fixation
What is the routine fixative used in the process Fixation?
Routine fixative: 10% formalin
Preserving the tissue specimen in as life-like a manner as possible
Routine fixative: 10% formalin
Fixation
A process of removing water from the specimen
Dehydration
In this process it utilizes increasing concentrations of ethyl alcohol
Dehydration
Dehydration utilizes increasing concentrations of?
Ethyl alcohol
Process of removing water from the specimen
Utilizes increasing concentrations of ethyl alcohol
Dehydration
A process which removes the dehydrating agents from the sample and replacing it with a fluid miscible with wax
Clearing
It is also known as De-alcoholization
Clearing
True or False: Clearing produces an opaque appearance of the sample
False
Translucent appearance of the sample
What is the routine clearing agent in the process of Clearing (De-alcoholization)?
Routine clearing agent: Xylene
Removing dehydrating agents from the sample and replacing it with a fluid miscible with wax
Produces a translucent appearance of the sample
Routine clearing agent: Xylene
Clearing (De-alcoholization)
A process where the clearing agent is removed and replaced a fluid that will cover the cavities resulting in a firmer consistency of the sample
Infiltration
Also known as Impregnation
Infiltration
What is the routine infiltration medium used in the process of Infiltration
Routine infiltration medium: Paraffin
Process where the clearing agent is removed
Clearing agent is replaced with a fluid that will cover the cavities resulting in a firmer consistency of the
sample
Routine infiltration medium: Paraffin
Infiltration (Impregnation)
The process of arranging the infiltrated tissue inside a mold containing a medium which is then allowed to
solidify
Embedding (Casting/ Blocking)
What is the routine embedding medium in the process of Embedding?
Routine embedding medium: Paraffin
Process of removing excess paraffin wax from the block
Trimming
Tissue blocks are cut into thin slices called ribbons/ sections
Sectioning
Also known as Microtomy
Sectioning
Application of dyes on the sections for studying the architectural pattern of the tissue and physical
characteristics of the cell
Staining
Process of placing a cover slip on the stained tissue
Mounting
Mounting is a process of placing a cover slip on the stained tissue using what type of mounting medium?
Routine mounting medium: Canada Balsam
Process of placing a cover slip on the stained tissue using a mounting medium
Routine mounting medium: Canada Balsam
Mounting