Crossing Boundaries
Are Peripheral Purely Undifferentiated Pleomorphic Sarcomas With MDM2 Amplification Dedifferentiated Liposarcomas?
Primary Endometrioid Stromal Sarcoma of the Ovary
EBV May Be Expressed in the LP Cells of Nodular Lymphocyte–predominant Hodgkin Lymphoma (NLPHL) in Both Children and Adults
Tumor Regression Grade of Urothelial Bladder Cancer After Neoadjuvant Chemotherapy
Prostate Cancer That Is Within 0.1 mm of the Surgical Margin of a Radical Prostatectomy Predicts Greater Likelihood of Recurrence
Pulmonary Interstitial Emphysema in Adults
The Histopathology of PRSS1 Hereditary Pancreatitis
Coexistent Pulmonary Granulomatosis With Polyangiitis (Wegener Granulomatosis) and Crohn Disease
GNAS Sequencing Identifies IPMN-specific Mutations in a Subgroup of Diminutive Pancreatic Cysts Referred to as “Incipient IPMNs”
Immunostaining for Polycomb Group Protein EZH2 and Senescent Marker p16INK4a May Be Useful to Differentiate Cholangiolocellular Carcinoma From Ductular Reaction and Bile Duct Adenoma
Lobular Endocervical Glandular Hyperplasia Is a Neoplastic Entity With Frequent Activating GNAS Mutations
Intrapatient Homogeneity of BRAFV600E Expression in Melanoma
Intranodal Papillary Epithelial Proliferations
Upper GI Tract Lesions in Familial Adenomatous Polyposis (FAP)
Fibrous Hamartoma of Infancy
Activating GNAS Mutations in Parosteal Osteosarcoma
SALL4 Expression in Germ Cell and Non–Germ Cell Tumors
SMARCB1 Involvement in the Development of Leiomyoma in a Patient With Schwannomatosis
HHV-8-positive and EBV-positive Intravascular Lymphoma
On the Reporting of New Information From Open Data Sets
Lobular Neoplasia of the Breast Revisited With Emphasis on the Role of E-cadherin Immunohistochemistry