PathologyOutlines.com
@pathologyoutlines.bsky.social
PathologyOutlines.com is a free, no-registration site with a unique, comprehensive, regularly updated textbook of surgical and clinical pathology, providing useful professional content for practicing pathologists and lab personnel, in 15 seconds or less.
We recently appointed a new deputy editor and several new editors to our Editorial Board! We welcome Dr. Skala as our new Deputy Editor in Chief for Gynecologic Pathology and Dr. Asadbeigi, Dr. Brčić , and Dr. Parilla as Editors.
Read about them here: buff.ly/1v3PzeN
#Pathology #PathologyOutlines
Read about them here: buff.ly/1v3PzeN
#Pathology #PathologyOutlines
January 22, 2026 at 7:20 PM
We recently appointed a new deputy editor and several new editors to our Editorial Board! We welcome Dr. Skala as our new Deputy Editor in Chief for Gynecologic Pathology and Dr. Asadbeigi, Dr. Brčić , and Dr. Parilla as Editors.
Read about them here: buff.ly/1v3PzeN
#Pathology #PathologyOutlines
Read about them here: buff.ly/1v3PzeN
#Pathology #PathologyOutlines
Image of the Week!
Contributed by: Seyed Salehi, M.D.
Textbook topic: Cervix
Diagnosis: Small cell neuroendocrine carcinoma
Textbook topic link: www.pathologyoutlines.com/topic/cervix...
#Pathology #PathologyOutlines #PathSky
Contributed by: Seyed Salehi, M.D.
Textbook topic: Cervix
Diagnosis: Small cell neuroendocrine carcinoma
Textbook topic link: www.pathologyoutlines.com/topic/cervix...
#Pathology #PathologyOutlines #PathSky
January 21, 2026 at 7:42 PM
Image of the Week!
Contributed by: Seyed Salehi, M.D.
Textbook topic: Cervix
Diagnosis: Small cell neuroendocrine carcinoma
Textbook topic link: www.pathologyoutlines.com/topic/cervix...
#Pathology #PathologyOutlines #PathSky
Contributed by: Seyed Salehi, M.D.
Textbook topic: Cervix
Diagnosis: Small cell neuroendocrine carcinoma
Textbook topic link: www.pathologyoutlines.com/topic/cervix...
#Pathology #PathologyOutlines #PathSky
Image Quiz! A 4 year old boy presented with pigmented macules around the lips and oral mucosa, gynecomastia and the findings shown on the testis biopsy here. What diagnosis is most associated with this case?
(Continued in thread)
#Pathology #PathologyOutlines #Diagnosis #PathSky
(Continued in thread)
#Pathology #PathologyOutlines #Diagnosis #PathSky
January 20, 2026 at 7:15 PM
Image Quiz! A 4 year old boy presented with pigmented macules around the lips and oral mucosa, gynecomastia and the findings shown on the testis biopsy here. What diagnosis is most associated with this case?
(Continued in thread)
#Pathology #PathologyOutlines #Diagnosis #PathSky
(Continued in thread)
#Pathology #PathologyOutlines #Diagnosis #PathSky
📣 Tell us what you think! Please share feedback about our website via the brief survey linked in the comments.
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January 19, 2026 at 7:57 PM
📣 Tell us what you think! Please share feedback about our website via the brief survey linked in the comments.
#Pathology #PathologyOutlines #PathSky
#Pathology #PathologyOutlines #PathSky
Here's a look back at 2025! ✨ This reel highlights last year's key updates and milestones. The video is also available on YouTube, which is linked in the comments.
#Pathology #PathologyOutlines #YearInReview #PathSky
#Pathology #PathologyOutlines #YearInReview #PathSky
January 16, 2026 at 7:34 PM
Here's a look back at 2025! ✨ This reel highlights last year's key updates and milestones. The video is also available on YouTube, which is linked in the comments.
#Pathology #PathologyOutlines #YearInReview #PathSky
#Pathology #PathologyOutlines #YearInReview #PathSky
Image of the Week!
Contributed by: Ayana Suzuki, Ph.D.
Textbook topic: Thyroid & parathyroid
Diagnosis: Medullary carcinoma
Textbook topic link: www.pathologyoutlines.com/topic/thyroi...
#Pathology #PathologyOutlines #PathSky
Contributed by: Ayana Suzuki, Ph.D.
Textbook topic: Thyroid & parathyroid
Diagnosis: Medullary carcinoma
Textbook topic link: www.pathologyoutlines.com/topic/thyroi...
#Pathology #PathologyOutlines #PathSky
January 14, 2026 at 6:49 PM
Image of the Week!
Contributed by: Ayana Suzuki, Ph.D.
Textbook topic: Thyroid & parathyroid
Diagnosis: Medullary carcinoma
Textbook topic link: www.pathologyoutlines.com/topic/thyroi...
#Pathology #PathologyOutlines #PathSky
Contributed by: Ayana Suzuki, Ph.D.
Textbook topic: Thyroid & parathyroid
Diagnosis: Medullary carcinoma
Textbook topic link: www.pathologyoutlines.com/topic/thyroi...
#Pathology #PathologyOutlines #PathSky
Read the latest Curing Cancer Network newsletter: buff.ly/CWRs6Xj
Follow CCN on LinkedIn: buff.ly/hBDPryK
#Cancer #CancerResearch #CuringCancerNetwork #Pathology #PathSky
Follow CCN on LinkedIn: buff.ly/hBDPryK
#Cancer #CancerResearch #CuringCancerNetwork #Pathology #PathSky
January 13, 2026 at 10:26 PM
Read the latest Curing Cancer Network newsletter: buff.ly/CWRs6Xj
Follow CCN on LinkedIn: buff.ly/hBDPryK
#Cancer #CancerResearch #CuringCancerNetwork #Pathology #PathSky
Follow CCN on LinkedIn: buff.ly/hBDPryK
#Cancer #CancerResearch #CuringCancerNetwork #Pathology #PathSky
Image Quiz!
A thymic biopsy is performed, and the tumor is shown. Which of the following is true regarding this thymic neoplasm?
(Continued in thread)
#Pathology #PathologyOutlines #Diagnosis
A thymic biopsy is performed, and the tumor is shown. Which of the following is true regarding this thymic neoplasm?
(Continued in thread)
#Pathology #PathologyOutlines #Diagnosis
January 12, 2026 at 7:02 PM
Image Quiz!
A thymic biopsy is performed, and the tumor is shown. Which of the following is true regarding this thymic neoplasm?
(Continued in thread)
#Pathology #PathologyOutlines #Diagnosis
A thymic biopsy is performed, and the tumor is shown. Which of the following is true regarding this thymic neoplasm?
(Continued in thread)
#Pathology #PathologyOutlines #Diagnosis
As we celebrate our upcoming 25th anniversary, we’re revisiting what shaped our early days, starting with a 1997 residency photo of Dr. Pernick and the margin notes that helped inspire it all.
PathOut's creation story is linked in comments.
#Pathology #PathologyOutlines #FlashbackFriday #PathSky
PathOut's creation story is linked in comments.
#Pathology #PathologyOutlines #FlashbackFriday #PathSky
January 9, 2026 at 7:32 PM
As we celebrate our upcoming 25th anniversary, we’re revisiting what shaped our early days, starting with a 1997 residency photo of Dr. Pernick and the margin notes that helped inspire it all.
PathOut's creation story is linked in comments.
#Pathology #PathologyOutlines #FlashbackFriday #PathSky
PathOut's creation story is linked in comments.
#Pathology #PathologyOutlines #FlashbackFriday #PathSky
Image of the Week!
Contributed by: Maria Tretiakova, M.D., Ph.D
Textbook topic: Kidney tumor
Diagnosis: TFEB rearranged RCC
Textbook topic link: www.pathologyoutlines.com/topic/kidney...
#Pathology #PathologyOutlines #PathSky
Contributed by: Maria Tretiakova, M.D., Ph.D
Textbook topic: Kidney tumor
Diagnosis: TFEB rearranged RCC
Textbook topic link: www.pathologyoutlines.com/topic/kidney...
#Pathology #PathologyOutlines #PathSky
January 7, 2026 at 7:04 PM
Image of the Week!
Contributed by: Maria Tretiakova, M.D., Ph.D
Textbook topic: Kidney tumor
Diagnosis: TFEB rearranged RCC
Textbook topic link: www.pathologyoutlines.com/topic/kidney...
#Pathology #PathologyOutlines #PathSky
Contributed by: Maria Tretiakova, M.D., Ph.D
Textbook topic: Kidney tumor
Diagnosis: TFEB rearranged RCC
Textbook topic link: www.pathologyoutlines.com/topic/kidney...
#Pathology #PathologyOutlines #PathSky
We recently appointed several new editors to our Editorial Board!
Read about them here: buff.ly/LH9NI3k
Our Boards: buff.ly/gJFmEiH
#Pathology #Textbook #PathologyOutlines #PathSky
Read about them here: buff.ly/LH9NI3k
Our Boards: buff.ly/gJFmEiH
#Pathology #Textbook #PathologyOutlines #PathSky
January 6, 2026 at 7:05 PM
We recently appointed several new editors to our Editorial Board!
Read about them here: buff.ly/LH9NI3k
Our Boards: buff.ly/gJFmEiH
#Pathology #Textbook #PathologyOutlines #PathSky
Read about them here: buff.ly/LH9NI3k
Our Boards: buff.ly/gJFmEiH
#Pathology #Textbook #PathologyOutlines #PathSky
Happy New Year! Thank you to our users for relying on us as a trusted pathology resource and to our advertising partners for your 2025 collaborations. We look forward to continuing to serve you in 2026 as we celebrate our 25th year in operation!
#Pathology #PathologyOutlines #HappyNewYear #PathSky
#Pathology #PathologyOutlines #HappyNewYear #PathSky
January 5, 2026 at 6:40 PM
Happy New Year! Thank you to our users for relying on us as a trusted pathology resource and to our advertising partners for your 2025 collaborations. We look forward to continuing to serve you in 2026 as we celebrate our 25th year in operation!
#Pathology #PathologyOutlines #HappyNewYear #PathSky
#Pathology #PathologyOutlines #HappyNewYear #PathSky
Image of the Week!
Contributed by: Thomas Pearce, M.D., Ph.D.
Textbook topic: CNS & pituitary tumors
Diagnosis: Spinal ependymoma
Textbook topic link: www.pathologyoutlines.com/topic/CNStum...
#Pathology #PathologyOutlines #PathSky
Contributed by: Thomas Pearce, M.D., Ph.D.
Textbook topic: CNS & pituitary tumors
Diagnosis: Spinal ependymoma
Textbook topic link: www.pathologyoutlines.com/topic/CNStum...
#Pathology #PathologyOutlines #PathSky
December 31, 2025 at 6:46 PM
Image of the Week!
Contributed by: Thomas Pearce, M.D., Ph.D.
Textbook topic: CNS & pituitary tumors
Diagnosis: Spinal ependymoma
Textbook topic link: www.pathologyoutlines.com/topic/CNStum...
#Pathology #PathologyOutlines #PathSky
Contributed by: Thomas Pearce, M.D., Ph.D.
Textbook topic: CNS & pituitary tumors
Diagnosis: Spinal ependymoma
Textbook topic link: www.pathologyoutlines.com/topic/CNStum...
#Pathology #PathologyOutlines #PathSky
Case of the Month: A 64 year old woman presented with markedly elevated serum alkaline phosphatase (ALP) and gamma glutamyl transferase (GGT).
Follow the link in the comments for the full clinical history and more!
#Pathology #PathologyOutlines #Diagnosis #PathSky
Follow the link in the comments for the full clinical history and more!
#Pathology #PathologyOutlines #Diagnosis #PathSky
December 30, 2025 at 6:51 PM
Case of the Month: A 64 year old woman presented with markedly elevated serum alkaline phosphatase (ALP) and gamma glutamyl transferase (GGT).
Follow the link in the comments for the full clinical history and more!
#Pathology #PathologyOutlines #Diagnosis #PathSky
Follow the link in the comments for the full clinical history and more!
#Pathology #PathologyOutlines #Diagnosis #PathSky
Image Quiz!
A neonate presents with a solid lung mass on imaging and symptoms of respiratory difficulty. Which of the following is the most likely diagnosis?
(Possible answers listed in thread)
#Pathology #PathologyOutlines #Diagnosis
A neonate presents with a solid lung mass on imaging and symptoms of respiratory difficulty. Which of the following is the most likely diagnosis?
(Possible answers listed in thread)
#Pathology #PathologyOutlines #Diagnosis
December 23, 2025 at 2:30 PM
Image Quiz!
A neonate presents with a solid lung mass on imaging and symptoms of respiratory difficulty. Which of the following is the most likely diagnosis?
(Possible answers listed in thread)
#Pathology #PathologyOutlines #Diagnosis
A neonate presents with a solid lung mass on imaging and symptoms of respiratory difficulty. Which of the following is the most likely diagnosis?
(Possible answers listed in thread)
#Pathology #PathologyOutlines #Diagnosis
Stay in the loop with PathologyOutlines.com. Subscribe to our blog via the link in the comments!
#Pathology #PathologyOutlines #Blog #PathSky
#Pathology #PathologyOutlines #Blog #PathSky
December 19, 2025 at 6:52 PM
Stay in the loop with PathologyOutlines.com. Subscribe to our blog via the link in the comments!
#Pathology #PathologyOutlines #Blog #PathSky
#Pathology #PathologyOutlines #Blog #PathSky
Image of the Week!
Contributed by: Ayana Suzuki, Ph.D.
Textbook topic: Thyroid & parathyroid
Diagnosis: Follicular neoplasm, Hürthle cell type
Textbook topic link: buff.ly/e5Eevm8
#Pathology #PathologyOutlines #PathSky
Contributed by: Ayana Suzuki, Ph.D.
Textbook topic: Thyroid & parathyroid
Diagnosis: Follicular neoplasm, Hürthle cell type
Textbook topic link: buff.ly/e5Eevm8
#Pathology #PathologyOutlines #PathSky
December 17, 2025 at 8:48 PM
Image of the Week!
Contributed by: Ayana Suzuki, Ph.D.
Textbook topic: Thyroid & parathyroid
Diagnosis: Follicular neoplasm, Hürthle cell type
Textbook topic link: buff.ly/e5Eevm8
#Pathology #PathologyOutlines #PathSky
Contributed by: Ayana Suzuki, Ph.D.
Textbook topic: Thyroid & parathyroid
Diagnosis: Follicular neoplasm, Hürthle cell type
Textbook topic link: buff.ly/e5Eevm8
#Pathology #PathologyOutlines #PathSky
Don't miss out when new videos are posted! Subscribe to our YouTube channel today.
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#Pathology #PathologyOutlines #YouTube #PathSky
(Channel linked in comments)
#Pathology #PathologyOutlines #YouTube #PathSky
December 15, 2025 at 7:58 PM
Don't miss out when new videos are posted! Subscribe to our YouTube channel today.
(Channel linked in comments)
#Pathology #PathologyOutlines #YouTube #PathSky
(Channel linked in comments)
#Pathology #PathologyOutlines #YouTube #PathSky
Image Quiz!
A 70 year old man presents with dysphagia and is found to have an esophageal mass. A biopsy of the mass shows the features pictured. No intermediate cells are present. What is the diagnosis?
(Continued in thread)
A 70 year old man presents with dysphagia and is found to have an esophageal mass. A biopsy of the mass shows the features pictured. No intermediate cells are present. What is the diagnosis?
(Continued in thread)
December 12, 2025 at 2:30 PM
Image Quiz!
A 70 year old man presents with dysphagia and is found to have an esophageal mass. A biopsy of the mass shows the features pictured. No intermediate cells are present. What is the diagnosis?
(Continued in thread)
A 70 year old man presents with dysphagia and is found to have an esophageal mass. A biopsy of the mass shows the features pictured. No intermediate cells are present. What is the diagnosis?
(Continued in thread)
Read the latest Curing Cancer Network newsletter: buff.ly/IZlRqrA
Follow CCN on LinkedIn: buff.ly/4HFMoRU
#Cancer #CancerResearch #CuringCancerNetwork #Pathology #PathSky
Follow CCN on LinkedIn: buff.ly/4HFMoRU
#Cancer #CancerResearch #CuringCancerNetwork #Pathology #PathSky
December 11, 2025 at 2:30 PM
Read the latest Curing Cancer Network newsletter: buff.ly/IZlRqrA
Follow CCN on LinkedIn: buff.ly/4HFMoRU
#Cancer #CancerResearch #CuringCancerNetwork #Pathology #PathSky
Follow CCN on LinkedIn: buff.ly/4HFMoRU
#Cancer #CancerResearch #CuringCancerNetwork #Pathology #PathSky
Image of the Week!
Contributed by: Molly Housley Smith, D.M.D
Textbook topic: Oral cavity & oropharynx
Diagnosis: Carcinoma cuniculatum
Textbook topic link: buff.ly/64zNPgo
#Pathology #PathologyOutlines #PathSky
Contributed by: Molly Housley Smith, D.M.D
Textbook topic: Oral cavity & oropharynx
Diagnosis: Carcinoma cuniculatum
Textbook topic link: buff.ly/64zNPgo
#Pathology #PathologyOutlines #PathSky
December 10, 2025 at 5:44 PM
Image of the Week!
Contributed by: Molly Housley Smith, D.M.D
Textbook topic: Oral cavity & oropharynx
Diagnosis: Carcinoma cuniculatum
Textbook topic link: buff.ly/64zNPgo
#Pathology #PathologyOutlines #PathSky
Contributed by: Molly Housley Smith, D.M.D
Textbook topic: Oral cavity & oropharynx
Diagnosis: Carcinoma cuniculatum
Textbook topic link: buff.ly/64zNPgo
#Pathology #PathologyOutlines #PathSky
Have you tried PathOutPal? This new, AI-powered assistant, developed in collaboration with Algoscope, recently launched on our site.
Designed to provide:
🔹Instant diagnostic answers
🔹Stain guidance
🔹Quick, reliable help
👉 Try it on PathologyOutlines.com.
#Pathology #PathologyOutlines #Algoscope
Designed to provide:
🔹Instant diagnostic answers
🔹Stain guidance
🔹Quick, reliable help
👉 Try it on PathologyOutlines.com.
#Pathology #PathologyOutlines #Algoscope
December 8, 2025 at 6:36 PM
Have you tried PathOutPal? This new, AI-powered assistant, developed in collaboration with Algoscope, recently launched on our site.
Designed to provide:
🔹Instant diagnostic answers
🔹Stain guidance
🔹Quick, reliable help
👉 Try it on PathologyOutlines.com.
#Pathology #PathologyOutlines #Algoscope
Designed to provide:
🔹Instant diagnostic answers
🔹Stain guidance
🔹Quick, reliable help
👉 Try it on PathologyOutlines.com.
#Pathology #PathologyOutlines #Algoscope
Our official merchandise shop is having a sale! Get 20% off everything through December 7. We have new Christmas-themed items and 25th anniversary merch.
Link: buff.ly/EgIIsBo
#Pathology #PathologyOutlines #PathSky
Link: buff.ly/EgIIsBo
#Pathology #PathologyOutlines #PathSky
December 5, 2025 at 7:30 PM
Our official merchandise shop is having a sale! Get 20% off everything through December 7. We have new Christmas-themed items and 25th anniversary merch.
Link: buff.ly/EgIIsBo
#Pathology #PathologyOutlines #PathSky
Link: buff.ly/EgIIsBo
#Pathology #PathologyOutlines #PathSky
Website Notice: We apologize for the Cookiebot consent glitch and are actively working on fixing it.
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#PathologyOutlines
December 4, 2025 at 7:41 PM
Website Notice: We apologize for the Cookiebot consent glitch and are actively working on fixing it.
#PathologyOutlines
#PathologyOutlines
Image of the Week!
Contributed by: Kyle Devins, M.D.
Textbook topic: Ovary
Diagnosis: Mucinous carcinoma
Textbook topic link: buff.ly/HE4iwSW
#Pathology #PathologyOutlines #PathSky
Contributed by: Kyle Devins, M.D.
Textbook topic: Ovary
Diagnosis: Mucinous carcinoma
Textbook topic link: buff.ly/HE4iwSW
#Pathology #PathologyOutlines #PathSky
December 3, 2025 at 6:43 PM
Image of the Week!
Contributed by: Kyle Devins, M.D.
Textbook topic: Ovary
Diagnosis: Mucinous carcinoma
Textbook topic link: buff.ly/HE4iwSW
#Pathology #PathologyOutlines #PathSky
Contributed by: Kyle Devins, M.D.
Textbook topic: Ovary
Diagnosis: Mucinous carcinoma
Textbook topic link: buff.ly/HE4iwSW
#Pathology #PathologyOutlines #PathSky