Gyu Yeong Kim

Working as a Chief Medical Offier in AIVIS Inc., South Korea. Having great passion for generalizing histomorphology in pathology. #BSTpath #PathArt

[Gyu Yeong Kim @Rosenrot_Path]

This is why I love #PathTweeter
So many cases, teaching, illustrations…and great patholgists all over the world👍
Thank you for your great work and inspiration @DrAHLAMN1 🙏🙏🙏

[AHLAM ALAHMADI MD @DrAHLAMN1]

💡📝⚡️🌞👩🏻‍💻📚 PAPILLARY THYROID CARCINOMA [ VARIANTS ] -My first #Endocrinepath Tweet 😅-🎯 #pathclues #PathBoards #pathology #patologia #pathologists #pathresidents #thyroid #pathart #pathclassic #ThyroidPath #histopathology #ThyroidCancer #Endopath #headandneckpath #pathtwitter

[Miruna Popescu, MD @MirunaPopescu13]

Clinical history? I was even considering a thyroid met 😅 (has focal nuclear pseudoinclusions but otherwise not the typical PTC nuclei). Maybe thyroid like RCC?
I was initially thinking pRCC (looks papillary in areas, but AMACR- 🧐), maybe MEST (SMA, CD10, ER), atrophic kidney like lesion, TFEB?
A lot of thoughts and maybe all wrong! 😅 Looking forward to the big reveal!

[Surgical Pathology Cases @surgpathcases]

Arm, 20y

#pathology #patologia #bstpath #dermpath

[Andrew H. Song @GreatAndrew90]

😎I am thrilled to share that I will be starting as an Assistant Professor of the Department of Translational Molecular Pathology and Institute for Data Science in Oncology at @MDAndersonNews, beginning January 1st, 2026!!!

[Woo Cheal Cho, MD @DrAldehyde]

It’s been a while since I shared a case.

Did you know this immunoprofile, especially the diffuse TRPS1 immunoreactivity, strongly favors primary EMPD over secondary EMPD? Give it a try if you haven’t used it in your practice. 😆🔬

#dermpath #IHCPath #MDACCPath

[Dan Graham @DanGrahamMD]

20s F middle ear lesion. Dx?

#HeadandNeckPath #PathTwitter #PathX

[Mark Ong @DrMarkOng]

IHC panel: GATA3 for breast/urol, PAX8 for gynae, CDX2 for GI, P63/HMWK for urothelial.

Here's one more stain - what other conditions do you think the patient has?

[Gyu Yeong Kim @Rosenrot_Path]

@slusagar If this is incidental finding, I would like to suspect minute adenomatoid tumor as my first ddx. Cystically dilated and anastomosing spaces lined with flat to cuboidal eosinophilic cells.

[Gladell Paner, MD @GladellPaner]

There’s a cell on 🔥 🔍

What’s your diagnosis on this #prostate tumor #GUPath tweeps? #OnePicDx

Answer in comment 👇👇👇

[Gyu Yeong Kim @Rosenrot_Path]

@fouad_boulos @washu_pathology @washupathedu It seems like DCIS involving underlying UDH. Two lesions should be noted independently. UDH is pushed to the center (telescoping) and periphery by atypical cells. Atypical cells are making micropapillary structure, so nearby area must be investigated to r/o micropaillary DCIS.

[Gyu Yeong Kim @Rosenrot_Path]

Believe it or not, I am pathology AI pessimist. I work in digital pathology AI startup to ensure patient safety and reliability. We must be critical to models that hit 99% accuracy, even no human pathologist can do that. Without proper rigorous validation, AI will prove nothing.

[C. Christofer Juhlin @DrJuhlin]

Pathology 🔬

1980 – “Immunohistochemistry will replace you!”
2010 – “Molecular genetics will replace you!”
2020 – “AI will replace you!”
2025 – “This app made by a startup with zero pathologists will replace you!”

”E pur si muove” /Galileo Galilei

[C. Christofer Juhlin @DrJuhlin]

Pathology 🔬

1980 – “Immunohistochemistry will replace you!”
2010 – “Molecular genetics will replace you!”
2020 – “AI will replace you!”
2025 – “This app made by a startup with zero pathologists will replace you!”

”E pur si muove” /Galileo Galilei

[Vikram Deshpande @Vik_deshpandeMD]

The WHO Classification of Tumours — the “blue books” — can do better. Of 61 expert members across 3 major volumes (digestive, breast, female genital), only 2 are from the Global South — where 85% of the world’s population lives.
Is @IARCWHO blind to the Global South?
#GlobalHealth #Pathology #CancerEquity #WHOBlueBooks

[Abhijit Das, MD @AbhijitSurgPath]

Pancreatic cancer: basic facts for residents
Pancreatic ductal adenocarcinoma, acinar cell carcinoma, pancreatoblastoma, PanNET, PanNEC, solid pseudopapillary neoplasm

#MakeSuriPathEasy#
#BasicFactsForResidents#

[Felipe D'Almeida @FelipePatologia]

My personal view of the recent discussion regarding WHO classifications.

Initially, some disclaimers:
- I do practice pathology in a LMIC country 🇧🇷

- I work in a private hospital and a private national lab chain with access to several molecular techniques

Follow the thread

[Gyu Yeong Kim @Rosenrot_Path]

Microglandular adenosis (MGA). Characteristic eosinophilic secretions are surrounded by single layer of cuboidal cells. Glands are haphazardly infiltrating into fibrous or adipose tissue. 25 - 30% of MGA are associated with invasive carcinoma (fourth picture).
#BreastPath

[Gyu Yeong Kim @Rosenrot_Path]

Weirdly hypervascular tumor at any random site > Always suspect metastatic clear cell RCC (even if it is not clear!)

[Daniel Berney @daniel_berney]

44F with hemithyroidectomy.
Supplied history was ‘thyroidectomy’. ���. 11mm encapsulated nodule. No capsular or vascular invasion.

[Daniel Berney @daniel_berney]

44F with hemithyroidectomy.
Supplied history was ‘thyroidectomy’. 🙄. 11mm encapsulated nodule. No capsular or vascular invasion.

[Ankur Sangoi @slusagar]

#GUpath renal mass biopsy from an adult human

any wagers from this #LPpath shot?

[Gyu Yeong Kim @Rosenrot_Path]

Metaplastic carcinoma with osteoclast-like giant cells.
#BreastPath #PathTweet

[Gyu Yeong Kim @Rosenrot_Path]

A rare case of fibromatosis-like metaplastic breast cancer. Tumor cells are predominantly spindle to stellate shape. Marked collagenous bundles resemble skeletal muscle at low magnification. If you are lucky, you may find mitosis or subtle epithelial differentiation.
#BreastPath