#Microscopic 

#Diagnosis 👉🏻  Riedel thyroiditis


#The_black_arrows
Dense fibrosis

#The_blue_arrows
Chronic inflammatory cell infiltrate

#The_yellow_arrow
Atrophied Follicles

#The_features
In the gross
- Stony hard due to fibrosis
- Tan or gray, woody
- avascular, no lobules apparent (adherant)
- Painless

In the Microscopic
- No normal lobular pattern
- Atrophied Follicles due to compression of dense fibrous tissue( pink color), which also infiltrates adjacent skeletal muscle
- Patchy lymphocytes
اي مش منظمة على شكل follicles ، منتشره فقط .
- No hurthle cells, no giant cells


NOTE
Cause Dysphagia and dyspnea

#Microscopic

#Diagnosis 👉🏻 Subacute Granulomatous thyroiditis ( Dequervain diseases)



#The_black_arrows
Gaint cell

#The_features
- Inflammatory infiltrate composed of multinucleated giant cells(enclose fragmentof colloid) , neutrophils, macrophage, lymphocytes, plasma cells
- Variable background of fibrosis
- a painful enlarged thyroid
- usually self-limited

#Microscopic

#Diagnosis 👉🏻 Subacute Granulomatous thyroiditis ( Dequervain diseases)


#The_black_area
Gaint cell 

#Gross  

#Diagnosis 👉🏻  Multinodular goiters (simple goiter)


#The_white_arrows
Colloid ( reddish brown )

#The_black_arrow
Fibrosis septa

#The_features
- Nodular enlargement
- Asymetrical
- Firm
- Show multinodular are variable in size and shape , and are separate by septa

NOTE
Cause Pressure symptoms due to compression of trachea and esophagus

#Gross  

#Diagnosis 👉🏻  Multinodular goiters


#The_white_area
Nodules

#The_black_arrow
Fibrosis Septa

#The_blue_stars
colloid

#The_yellow_arrows
Hemorrhage

#The_features
cut surface shows multinodular separated by fibrosis septa , hemorrhagic , brown colloid with focal calcification

#Microscopic

#Diagnosis 👉🏻  Multinodular goiters


#The_blue_arrows 
Colloid

#The_black_area
Fibrosis septa 
و Nodule هي يلي محوطه ب septa كامل

#The_features
- Multinodular are variable in size and shape , separate by septa
- The single nodule composed of multiple thyroid follicles that are Dilated by Colloid with flattened to hyperplastic epithelium cells

✓ The follicles are variable in size , separated by fibrous stroma

#Microscopic

#Diagnosis 👉🏻  Multinodular goiters


#The_white_area
Follicles

#The_black_area
Fibrosis septa 

#The_blue_arrows
Hemorrhage

#Gross  

#Diagnosis 👉🏻  Colloid goiter -thyroid with colloid cysts-
( simple goiter/diffuse nontoxic goiter)


#The_white_arrow
Large colloid cyst

#The_black_arrow
Small colloid cyst

#The_features
Diffuse enlargement gland with brownish cysts, cut surface is brown (colloid)

#Microscopic

#Diagnosis 👉🏻 Colloid goiter ( simple goiter/diffuse nontoxic goiter)


#The_black_area
Follicle 

#The_features
The follicles enlarged and filled by abundant colloid , with Flattened follicular epithelial lining

#Microscopic

#Diagnosis 👉🏻 graves diseases


#The_black_area
 lymphoid follicle

#The_blue_arrows
papillary infoldings

#The_features
- Tall follicular cells (tall columnar epithelium cells) with papillae usually lacking fibrovascular cores
بسبب انه الخلايا حصل لها hyperplasia
- Nuclei are round, often basally located, rarely overlap
- Scalloping of colloid , or vacuoles due to follicular cells eat colloid for the production of hormones

#Microscopic

#Diagnosis 👉🏻 graves diseases


#The_black_area
 lymphoid follicle

#The_blue_arrows
papillary infoldings

#The_brown_arrows
follicular cells appear columnar

#The_yellow_arrows
Scalloping or vacuoles

#Gross

#Diagnosis 👉🏻 follicular thyroid neoplasm (follicular adenoma)


#The_white_arrow
Normal thyroid

#The_black_arrow
Capsule

#The_blue_star
Neoplasm (adenoma)

#The_features
- an encapsulated round
neoplasm with a uniform (solitary) nodule.
- bright brown appearance, surrounded by a rim of normal thyroid

NOTES
• Cause pressure symptoms
• Painless
• Cause hyperthyroidism

#Gross

#Diagnosis 👉🏻 follicular thyroid neoplasm ( follicular adenoma )

#Microscopic

#Diagnosis 👉🏻 follicular thyroid neoplasm


#The_black_arrow
Normal follicles

#The_red_area
Capsule

#The_white_arrow
Neoplasm (adenoma)

#The_features
- well differentiation
- an encapsulated round
neoplasm
- The tumor is composed of cloclosely packed follicles

#Microscopic

#Diagnosis 👉🏻 follicular thyroid neoplasm


#The_black_arrow
Normal follicles

#The_red_area
Capsule

#The_white_arrow
Neoplasm (adenoma)

#Gross

#Diagnosis 👉🏻  Papillary carcinoma


#The_blue_arrows
Normal thyroid

#The_black_arrows
Tumor tissue

#The_red_arrow
Calcification (Psammoma body)

#The_yellow_arrows
Tumor tissue
هنا عامله infiltrative

#The_features
- The tumor is usually solid
- grey white in color
- papillary projections
- sometimes it can be multifocal
- encapsulated or infiltrative
- calcification (appear white in color)

#Gross

#Diagnosis 👉🏻  Papillary carcinoma


#The_blue_arrow
Colloid

#The_black_arrow
Normal thyroid

#The_white_arrow
papillary projections of the tumor

#The_white_star
Tumor tissue

#Gross

#Diagnosis 👉🏻  Papillary carcinoma


#The_black_arrow
papillary projections of the tumor

#The_white_arrows
Tumor tissue

#The_blue_arrow
Calcification

#The_green_arrow
Normal thyroid

#Microscopic

#Diagnosis 👉🏻  Papillary carcinoma


#The_white_arrow
Psammoma body

#The_green_arrows
Optical clear nuclei ( ground glass nuclei)

#The_blue_arrows
Papillae

#The_black_arrows
Papillae by transfert section

#The_features
Nuclear features
- Change of nuclear size and shape
• nuclear enlargement, elongation
• Nuclear overlapping:  the nuclei are so crowded that they look like they are sitting on one another
• Ground glass nuclei : it means the chromatin is finely dispersed and optically clear. This appearance is also known as “Orphan Annie Eye” 
• groove nuclei are formed due to folding of  the unessential nuclear membrane
• nuclear inclusions
• Vascular Nuclei
- Nuclear membrane irregular

Other features
- randomly oriented papillae with fibrovascular cores
- Psammoma body in the fibrovascular cores