American Registry of Pathology Press

12/17/2025

More on meningiomas from arppress.org/books/book/69:
Some striking subtypes of meningioma include: psammomatous, angiomatous, and secretory.

12/12/2025

From arppress.org/books/book/69:
Meningiomas are well-circumscribed, extra-axial, dural-based masses, and are the most frequent primary CNS tumors reported (in the US). The prototypical subtype is termed meningothelial and is composed of syncytial cells with overt whorl formation.

12/12/2025

As the year draws to a close and the holiday season is in full swing, we extend our warmest wishes to you and your family. Year-End Sale Alert! Save 30% on All Fascicles Use the code ARP2025-jkjvutwu at www.arppress.org.

12/02/2025

For decades, the American Registry of Pathology (ARP) has been the cornerstone of pathology education globally, thanks to the definitive AFIP/ARP Fascicles.

This , your donation ensures this vital tradition continues for the next generation of pathologists.

Help us secure this legacy. Give today: https://arppress.org/pages/donate

12/02/2025

More from arppress.org/books/book/69:
Choroid plexus papilloma represents a well-differentiated choroid plexus tumor that commonly exhibits focal glial differentiation (elongated GFAP-positive cells).

12/02/2025

We'll take a dive into the new non-neoplastic skin fascicle (arppress.org/books/book/70), and some if its excellent images, in January to celebrate the new year!

Meanwhile, we'll continue with our exploration of the CNS tumor fascicle (arppress.org/books/book/69) for the rest of December.

The human skin, as the largest organ of the body, is home to numerous neoplastic and non-neoplastic disorders. The vast majority of non-neoplastic skin dis

12/01/2025

New release for at arppress.org. Introducing Non-Neoplastic Disorders of the Skin, the must-have clinical atlas for anyone interpreting challenging skin biopsies. With its wealth of high-quality clinical and histopathologic images, this book is your new go-to resource.

11/28/2025

Shop www.arppress.org and get 20% off books with code: Black Friday-l3rdew34

11/27/2025

Your generosity, whether personal or institutional, is an investment in the foundational knowledge of pathology. This giving season, we humbly ask for your support. https://arppress.org/pages/donate

11/24/2025

Continuing from arppress.org/books/book/69:
Pineoblastoma is a high-grade embryonal neoplasm with round blue cell cytomorphology centered in the pineal gland (a CNS WHO grade 4); this tends to affect children (1st two decades) but may develop at any age.

11/13/2025

From the new "Tumors of the Central Nervous System" fascicle (arppress.org/books/book/69):
Ependymomas demonstrates both glial and epithelial differentiation, and sharp circumscription is a hallmark. Morphologic patterns can vary widely! Patterns that are not their own subtype include cellular (A), clear cell (B), tanycytic (C), and papillary (D).

11/05/2025

Happy International Pathology Day! 🔬
The American Registry of Pathology (ARP) celebrates pathologists and laboratory professionals worldwide. Your precision, education, and innovation are the foundation of quality healthcare that saves lives every day. Don't miss 20% off ARP Fascicles this week (Code: NPW2025-tofobtwb). Shop: arppress.org