Related Experiment Video
Updated: Aug 15, 2026

Freezing Injury in Mouse Masseter Muscle to Establish an Orofacial Muscle Fibrosis Model
Published on: December 29, 2023
[Intravascular endothelial papillary hyperplasia in the masseter muscle]
F J Rodriguez Campo1, F Monje Gil, A Chaves Benito
1Service de Chirurgie Buccale et Maxillofaciale, Hospital de la Princesa, Universidad Autonoma de Madrid, Espagne.
Abstract:
Intravascular Papillary Endothelial Hyperplasia (IVPEH) is a benign process, even uncommon. It was first described by Masson in 1923 under the name "Hemangioendotheliom vegetant intravascular". We present a case of IVPEH located in the masseter muscle. The treatment for this lesion was surgical excision. The histological examination is very important in order to separate this lesion from angiosarcoma.
Related Concept Videos
Papillary Dermis
The dermis might be considered the "core" of the integumentary system, as distinct from the epidermis and hypodermis. It contains blood and lymph vessels, nerves, and other structures, such as hair follicles and sweat glands. The dermis is made of two layers of connective tissue that comprise an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts.
Papillary Layer
The papillary layer is made of loose, areolar connective tissue, which means the collagen and...
Atherosclerosis I: Introduction

