Case of the Month: A 58 year old man with a known history of sigmoid adenocarcinoma was found to have a right inguinal node lesion on PET CT during staging for the adenocarcinoma. No systemic symptoms were reported. What is your diagnosis? See link in comments. #Pathology #PathologyOutlines

Image of the Week! Contributed by: S. Emily Bachert, M.D. Textbook topic: Breast Diagnosis: Mixed NST of breast Textbook topic link: www.pathologyoutlines.com/topic/breast... #Pathology #PathologyOutlines

Image Quiz! Which of the following nail unit structures lack a granular layer, as shown in the image? A. Hyponychium B. Lateral nail folds C. Matrix and nail bed D. Proximal nail fold Answer linked in the comments. #Pathology #PathologyOutlines #Diagnosis

Industry Insights, a new feature on our website, provides curated content from the life science community. Featured Industry Insight, "Artificial Intelligence for Computational and Digital Pathology": buff.ly/4Bj8v9T More Industry Insights will later be linked in the navigation bar on our site.

The latest addition to the pathCast-PathologyOutlines.com Short Video Series, a collaborative educational initiative that supplements PathologyOutlines.com topics with concise, author-led video reviews, is now available! Watch: buff.ly/SU3nuNY Related PathologyOutlines.com topic: buff.ly/xFl35oo

As part of PathologyOutlines.com's 25th Anniversary celebration, we sat down with founder Dr. Nat Pernick to get his perspective on the history of PathOut, our operating philosophy, and what's coming in the future. Watch now: www.youtube.com/playlist?lis... #Pathology #PathologyOutlines

Image Quiz! A 30 year old woman underwent a routine Pap smear screening. What is the diagnosis? A. Actinomyces spp. B. Atypical squamous cells C. Candida spp. D. Herpes simplex virus (HSV) E. Pseudoactinomycotic radiate granules Answer: buff.ly/2qbs6MK #Pathology #PathologyOutlines

Image of the Week! Contributed by: Raul S. Gonzalez, M.D. Textbook topic: Appendix Diagnosis: Appendix - GIST Textbook topic link: www.pathologyoutlines.com/topic/append... #Pathology #PathologyOutlines #PathSky

PathOutPal just got smarter! Our AI-powered assistant, powered by Algoscope and fueled with our textbook content, has been upgraded to serve the pathology community even better. ↘️ Look for PathOutPal in the lower right corner of PathologyOutlines.com. #Pathology #PathologyOutlines #PathOutPal

Image of the Week! Contributed by: Shikha Malhotra, M.B.B.S., M.D. Textbook topic: Stains & CD markers Diagnosis: Follicular lymphoma, BCL2 IHC Textbook topic link: www.pathologyoutlines.com/topic/stains... #Pathology #PathologyOutlines #PathSky

What does the pathology fellowship market look like? Dr. Debra Zynger, Dr. Nat Pernick, and others dug into data in a new publication on fellowship trends. Access via links below! PubMed Article: buff.ly/ESkypOR Poster (PDF): buff.ly/j2eDEzZ #Pathology #PathologyFellowship #PathologyOutlines

Read the latest Curing Cancer Network newsletter: www.curingcancernetwork.org/ccnnewslette... Follow CCN on LinkedIn: www.linkedin.com/company/curi... #Cancer #CancerResearch #CuringCancerNetwork #Pathology

Looking for pathology-related conferences, webinars, or courses?🔬We've made it easy for pathologists and laboratory personnel to find what they need. Explore our regularly updated, categorized list: buff.ly/4LE894R #Pathology #PathologyConferences #PathologyOutlines #LaboratoryMedicine

We are proud to support the PathologyOutlines.com Law Scholarship Fund at the University of Michigan Law School. This year’s recipient is Lucia Choi, a first-year law student from Michigan. View all PathologyOutlines.com scholarships: buff.ly/8LAHZMP #PathologyOutlines #UMich #UMichLaw

Image of the Week! Contributed by: Phoenix D. Bell, M.D., M.S. Textbook topic: Stomach Diagnosis: Stomach - GIST Textbook topic link: www.pathologyoutlines.com/topic/stomac... #Pathology #PathologyOutlines #PathSky

Image Quiz! The spindle cells in the paratesticular pseudotumor shown in the photomicrograph below are believed to be related to which line of differentiation? A. Adipocytic B. Histiocytic C. Myofibroblastic D. Nerve sheath E. Vascular Answer linked in the comments. #Pathology #PathologyOutlines

We added a common CD markers subsection to the "Stains and CD markers" chapter to make them easier to find! Email comments@pathologyoutlines.com to let us know other ways we can make our website easier to navigate. View chapter: www.pathologyoutlines.com/stains.html #Pathology #PathologyOutlines

Dr. Umeres was recently appointed to our Resident/Fellow Advisory Board. He obtained his M.D. at Universidad Peruana de Ciencias Aplicadas in Peru. He is currently a second year resident at Northwestern University Feinberg School of Medicine. More: buff.ly/qRIFpAN #Pathology #PathologyOutlines

Case of the Month: A 43 year old woman underwent a hysterectomy for dysmenorrhea. Representative sections of a myometrial mass are shown here. What is your diagnosis? View the case: www.pathologyoutlines.com/caseofweek/c... #Pathology #PathologyOutlines #Diagnosis #PathSky

Image of the Week! Contributed by: Lucas F. Abrahao Machado, M.D., Ph.D. Textbook topic: Soft tissue Diagnosis: Extraskeletal osteosarcoma Textbook topic link: www.pathologyoutlines.com/topic/softti... #Pathology #PathologyOutlines #PathSky

Pathologists play a critical role in advancing equitable healthcare for all, including the LGBTQ+ community. Explore related content from our site and ASCP via the link below. Know of other pertinent resources for pathologists? Comment below! Links: buff.ly/vAajGSN #Pathology #PathologyOutlines

Image of the Week! Contributed by: Jayden Ray, D.O. Textbook topic: Skin nonmelanocytic tumor Diagnosis: Pleomorphic dermal sarcoma Textbook topic link: www.pathologyoutlines.com/topic/skintu... #Pathology #PathologyOutlines #PathSky

Image Quiz! A 45 year old woman has a breast mass identified on imaging. Core biopsy demonstrates the histology shown. What is the most likely etiology? (Continued in thread)

We've provided our site for free for 25 years and intend to continue, but our textbook content and images are copyrighted. Limited use policy: buff.ly/JsReoiv We enforce intellectual property rights; previous actions include shutting down sites and reporting violations to employers. #Pathology

Dr. Christian Schürch, one of our CD Markers & Stains editors, also edits Precision Pathology, a new, open access journal. They welcome a broad range of contributions, including original research articles, reviews, and editorials, and won't charge ACP through Dec. 30, '27. Journal: buff.ly/hlo67kf

From our Founder, Dr. Nat Pernick: “I am pleased to announce that our Curing Cancer Network now has its own URL, CuringCancerNetwork.org. The website includes my new textbook, ‘How Cancer Arises’.” Learn more: buff.ly/6NNpQSv #Pathology #CuringCancerNetwork #CancerResearch #PathologyOutlines

Image of the Week! Contributed by: David Danielson, M.D. Textbook topic: Bone marrow neoplastic Diagnosis: T lymphoblastic lymphoma / leukemia Textbook topic link: www.pathologyoutlines.com/topic/leukem... #Pathology #PathologyOutlines #PathSky

We appreciate the great authors who help pathologists find information fast by writing for PathologyOutlines.com. Here is a list of our most prolific authors of 2025, based on the completed date for the topic: www.pathologyoutlines.com/authors_For_.... #Pathology #PathologyOutlines #PathSky

From margin notes to a globally trusted resource, PathologyOutlines.com has had an incredible 25-year journey. Explore our interactive timeline to see the milestones that shaped PathologyOutlines.com: www.pathologyoutlines.com/aboutus.html #Pathology #PathologyOutlines #PathSky

🔬 Looking for a pathology fellowship? Our website features searchable listings of current fellowship openings. No matter your specialty, our site makes it easy to explore fellowship options. Explore current openings on our site: buff.ly/Fec1Eei #Pathology #PathologyFellowships #PathologyOutlines