Thanks to all who answered our recent poll! Out of 759 responses, 53% use PathologyOutlines.com daily, and 33% use it several times a week. That’s ~87% of respondents visiting at least several times a week! We’re honored to be part of your daily workflow. 🔬 #Pathology #PathologyOutlines #PathSky

Image of the Week! Submitted by: Rebecca Chernock, M.D. Directory Profile: www.pathologyoutlines.com/directory/re... Subspecialty: Head & neck Diagnosis: CMV in a minor salivary gland #Pathology #PathologyOutlines #ENTPath #PathSky

Image Quiz! The image shown is from a renal tumor. Which of the following statements is true about the immunohistochemical profile of the tumor type shown? (Continued in thread) #Pathology #PathologyOutlines #Diagnosis

September 2025 Issue: “What’s New in Hematopathology 2025: Myeloid Neoplasms in the WHO 5th Edition and ICC” by Barina Aqil, M.D. Webpage: buff.ly/b8vEGAH PDF: buff.ly/CYhQ1tZ Access archives or sign up for future issues via email: buff.ly/LZ5MfeS #Pathology #PathologyOutlines #PathSky #HemePath

🎉As part of our 25th anniversary celebration, we invite you to share your favorite PathOut photos (conference moments or merch sightings) with us at [email protected]. 📸 Selected submissions will be featured at a later date. #Pathology #PathologyOutlines #PathSky

Image of the Week! Submitted by: Doaa Atwi, M.D. Directory Profile: buff.ly/3mO0lgu Subspecialty: Gyn Diagnosis: Dedifferentiated carcinoma of the ovary #Pathology #PathologyOutlines #Gynpath #PathSky

Have you read the latest Curing Cancer Network newsletter? See it here: buff.ly/QW4FDYI Follow CCN on LinkedIn: buff.ly/PfzUbcN #Cancer #CancerResearch #CuringCancerNetwork #Pathology #PathSky

🎉As PathologyOutlines.com begins its 25th year, we’re starting a year-long celebration. We want you to be part of it! Have questions for our founder, Dr. Nat Pernick? Now’s your chance to ask! 💬 Comment with your question. He’ll answer a selection later this year! #Pathology #PathologyOutlines

Check out the rest of our photos from ECP 2025 and CAP25 on our Facebook, Instagram, or LinkedIn profiles! Facebook: www.facebook.com/pathologyout... Instagram: www.instagram.com/pathoutlines/ LinkedIn: www.linkedin.com/company/path... #Pathology #PathologyOutlines #ECP2025 #CAP25

Case of the Month: A 67 year old man with a history of chronic obstructive pulmonary disease, prediabetes and abdominal imaging consistent with cirrhosis underwent a non-targeted liver biopsy. What's your diagnosis? See link in comments for the case! #Pathology #PathologyOutlines #Diagnosis

Image of the Week! Submitted by: Nicolò Vianini, M.D. Directory Profile: www.pathologyoutlines.com/directory/ni... Subspecialty: GU Diagnosis: Renal oncocytoma #Pathology #PathologyOutlines #PathSky

Image Quiz! A patient presents with multiple pruritic, scaly patches on the back. A skin biopsy was performed, and a PAS special stain is shown. What's the best diagnosis? A. Candidiasis B. Tinea corporis C. Tinea cruris D. Tinea versicolor See comments for answer. #Pathology #PathologyOutlines

Are you at CAP25 in Orlando? Come see us at Booth 509! #Pathology #PathologyOutlines #CAP25 #PathSky

Will you be attending CAP25 in Orlando? Stop by to see us at Booth 509! We hope to see you there! #Pathology #PathologyOutlines #CAP25 #PathSky

Image of the Week! Submitted by: Jacqueline Birkness-Gartman, M.D. Directory Profile: www.pathologyoutlines.com/directory/ja... Subspecialty: GI / liver Diagnosis: Juvenile polyp #Pathology #PathologyOutlines #GIPath #PathSky

We’re proud to announce that our Algoscope collaboration resulted in PathOutPal, an AI-powered assistant for the pathology community. Now live on PathologyOutlines.com! Designed to provide: 🔹Instant diagnostic answers 🔹Stain guidance 🔹Quick, reliable help #Pathology #PathologyOutlines #Algoscope

We're at the 37th European Congress of Pathology in Vienna! Stop by to see us at Booth 100 Hall X5. #Pathology #PathologyOutlines #ECP2025 #ESPCongress #PathSky

Are you attending the 37th European Congress of Pathology in Vienna next week? Stop by to see us at Booth 100 Hall X5! Comment on this post or send us a message on social media if you'd like to schedule a chat with us at ECP 2025. #Pathology #PathologyOutlines #ECP2025 #ESPCongress

Image of the Week! Submitted by: Yosep Chong, M.D., Ph.D. Directory Profile: www.pathologyoutlines.com/directory/yo... Subspecialty: Dermatopathology Diagnosis: Porokeratosis #Pathology #PathologyOutlines #DermPath #PathSky

Image Quiz! A 65 year old man presents with elevated prostate specific antigen (PSA) and undergoes a prostate biopsy, stained with high molecular weight cytokeratin (HMWCK) (shown below). What is the most likely interpretation of this staining pattern? (Continued in thread)

Our office is closed today, Monday, September 1st, in observance of Labor Day. We hope you have a safe, happy holiday. #LaborDay #PathologyOutlines

PathologyOutlines.com teamed up with Algoscope to create PathOutPal, an AI-powered assistant for the pathology community. Built on the trusted foundation of PathologyOutlines.com and Algoscope’s AI expertise, it'll soon be available on our site. #Pathology #PathologyOutlines #Algoscope #PathSky

Image of the Week! Submitted by: Yvonne Bury, M.D. Directory Profile: buff.ly/dmF3WQl Subspecialty: Pleural fluid Diagnosis: Metastatic adrenal cortical carcinoma in pleural fluid #Pathology #PathologyOutlines #PathSky

🎉As PathologyOutlines.com begins its 25th year, we’re starting a year-long celebration. We want you to be part of it! Have questions for our founder, Dr. Nat Pernick? Now’s your chance to ask! 💬 Comment with your question. He’ll answer a selection later this year! #Pathology #PathologyOutlines

Are you attending #CAP25 in Orlando next month? Stop by to see us at Booth 509! Comment on this post or send us a message on social media if you'd like to schedule a chat with us at CAP25. We hope to see you there! #Pathology #PathologyOutlines #PathSky

Case of the Month: A 55 year old man with HIV/AIDS presents with diarrhea and weight loss and is found to have ulcers in the stomach and duodenum. What is your diagnosis? Follow the link in the comments for the case! #Pathology #PathologyOutlines #Diagnosis #PathSky

Image of the Week! Submitted by: Larissa Lembert Tezanos, M.D. Directory Profile: buff.ly/2hl9ZOg Subspecialty: Breast Diagnosis: Collagenous spherulosis #Pathology #PathologyOutlines #PathSky

Image Quiz! A raised vaginal lesion in a 52 year old woman was biopsied and demonstrated features shown in the image. What is your diagnosis? (Continued in thread) #Pathology #PathologyOutlines #Diagnosis

Dr. Pernick was a guest on a recent pathCast session. The chat includes the story behind PathOut, his views on education, tech, and open-access medical knowledge, his transition from clinical practice to entrepreneurship, and more. Link: buff.ly/mQ4XS4e #Pathology #PathologyOutlines #pathCast

Are you attending the 37th European Congress of Pathology in Vienna next month? Stop by to see us at Booth 100 Hall X5. Comment on this post or send us a message on social media if you'd like to schedule a chat with us at ECP 2025. #Pathology #PathologyOutlines #ECP2025 #ESPCongress

Image of the Week! Submitted by: Gustavo G. Engelman, M.D. Directory Profile: buff.ly/g1lc8eY Subspecialty: Pulmonary / thoracic Diagnosis: Thymoma type A #Pathology #PathologyOutlines #PulmPath

🎉As PathologyOutlines.com begins its 25th year, we’re starting a year-long celebration. We want you to be part of it! Have questions for our founder, Dr. Nat Pernick? Now’s your chance to ask! 💬 Comment with your question. He’ll answer a selection later this year! #Pathology #PathologyOutlines

Essay: My Male Breast Cancer (Part 3), by Dr. Nat Pernick In this essay, Dr. Pernick reviews the results of his genetic testing and more. Access here: buff.ly/1Aj9RET Follow Curing Cancer Network: buff.ly/H3kGDig #Cancer #CuringCancerNetwork #Pathology #PathologyOutlines

Image of the Week! Submitted by: Fernando Tenorio-Rocha, Ph.D. Directory Profile: buff.ly/Bi3TZTx Subspecialty: Oral and maxillofacial pathology Diagnosis: Odontogenic keratocyst #Pathology #PathologyOutlines #OralPath #PathSky

Image Quiz! A female urethra is resected with the primary tumor shown in the image. The tumor strongly and diffusely expresses CK5/6 and p63 but is negative for PAX8 and only has weak expression of GATA3. What is the best diagnosis? (Cont. in thread) #Pathology #PathologyOutlines #PathSky

🎉 This month is the beginning of the 25th year of PathologyOutlines.com; look how far we’ve come together! Stay tuned for chances to join in on our year‑long celebration! Thanks for being part of our journey. #Pathology #PathologyOutlines #PathSky

How often do you use our website, PathologyOutlines.com? A. Every day B. Several times a week C. A few times a month D. Rarely #Pathology #PathologyOutlines #PathSky

Image of the Week! Submitted by: Giuseppe Maria Longo, M.D. Directory Profile: buff.ly/P3LRRzO Subspecialty: Neuropathology Diagnosis: Pleomorphic Xanthoastrocytoma (PXA) #Pathology #PathologyOutlines #PathSky

Case of the Month: A large, deep paraspinal mass was discovered in a 71 year old man during clinical evaluation for hematuria. The mass was biopsied. What is your diagnosis? Follow the link in the comments for the case! #Pathology #PathologyOutlines #Diagnosis #PathSky

Image of the Week! Submitted by: Giovanni A. Molina Paredes, M.D. Directory Profile: www.pathologyoutlines.com/directory/gi... Subspecialty: Medical renal Diagnosis: Pauci-immune complex crescentic glomerulonephritis #Pathology #PathologyOutlines #PathSky

Image Quiz! A patient presents with abdominal pain and is found to have mural thickening of the colon. Symptoms persist, and the colon is resected. Based on the histologic image, which of the following is the most likely diagnosis? (Continued in thread) #Pathology #PathologyOutlines #Diagnosis

Have you found us on r/PathologyOutlines? We hope to see you there! www.reddit.com/r/PathologyO... #Pathology #PathologyOutlines #Reddit

Current and former PathologyOutlines.com authors: Changing institutions soon? Switched email addresses recently? To ensure that you continue to receive communications from us, please email [email protected] with your updated contact information. #PathologyOutlines

Image of the Week! Submitted by: Guru Siddaiah Chapirimath, M.D. Directory Profile: buff.ly/20vJJFS Subspecialty: Histopathology Diagnosis: Cross-section of appendix showing Enterobius vermicularis infestation #Pathology #PathologyOutlines #PathSky

My Male Breast Cancer (Pt. 2), by Dr. Nat Pernick On 4/9/25, Dr. Pernick had a double mastectomy and right sided sentinel node dissection for right sided male breast cancer. This is the second essay sharing his experience from a pathologist’s perspective. Essay: buff.ly/D4c7rKn #Cancer #Pathology

Image Quiz! A 10 year old girl presented with generalized lymphadenopathy. Bone marrow aspirate collected as a part of diagnostic workup is shown in the image. Which of the following immunohistochemical results are suggestive of the diagnosis of NK lymphoblastic lymphoma? (Continued in thread)

Image of the Week! Submitted by: Miruna C. Popescu, M.D. Directory Profile: buff.ly/dc1Jnsa Subspecialty: Bone, joints & soft tissue Diagnosis: Plexiform neurofibroma #Pathology #PathologyOutlines #BSTPath #PathSky

Our office is closed today--Friday, July 4th. We will reopen on Monday, July 7th. #PathologyOutlines

Read the latest Curing Cancer Network newsletter: buff.ly/qQ6Jr9l Follow CCN on LinkedIn: buff.ly/LWP0lxH #Cancer #CancerResearch #CuringCancerNetwork #Pathology #PathSky

Current and former PathologyOutlines.com authors: Changing institutions soon? Switched email addresses recently? To ensure that you continue to receive communications from us, please email [email protected] with your updated contact information. #PathologyOutlines