Related Experiment Video
Updated: May 13, 2026
09:53
Role of Diffusion MRI Tractography in Endoscopic Endonasal Skull Base Surgery
Published on: July 5, 2021
[Maxillary ameloblastoma extending into the sinonasal tract]
1Institut für Pathologie, St. Vincentius-Kliniken Karlsruhe, Südendstrasse 37, Karlsruhe, Germany. Helene.Geddert@vincentius-ka.de
Der Pathologe
|February 26, 2013
Summary
Maxillary ameloblastomas, slow-growing tumors, can invade sinuses and nasal cavities. These tumors have high recurrence rates, making complete surgical removal challenging.
Area of Science:
- Oral and Maxillofacial Surgery
- Head and Neck Oncology
Background:
- Maxillary ameloblastomas are rare odontogenic tumors with a propensity for extensive local invasion.
- Their slow growth can lead to significant expansion into adjacent structures like the paranasal sinuses and nasal cavity.
Observation:
- Sinusitis is an uncommon initial presentation for maxillary ameloblastomas.
- Histological diagnosis is complex, requiring differentiation from various odontogenic and non-odontogenic tumors, including sinonasal and salivary gland neoplasms.
- Complete surgical resection with wide margins is often difficult to achieve due to the tumor's infiltrative nature.
Findings:
- Maxillary ameloblastomas exhibit the highest recurrence rates among ameloblastomas.
- Tumor extension into the paranasal sinuses and nasal cavity is a characteristic feature.
Implications:
- Early recognition and accurate histological diagnosis are crucial for effective management.
- The high recurrence rate underscores the need for aggressive surgical techniques and potentially adjuvant therapies.
- Multidisciplinary approaches are essential for optimizing treatment outcomes in these challenging cases.
Related Concept Videos
01:29Anatomy of Respiratory System I: Upper Respiratory Tract
The upper respiratory tract plays a vital role in the respiratory system, comprising several structures that facilitate air intake and prepare air for the lungs. It also serves as the first line of defense against pathogens and particles. This tract includes the nose and nasal cavity, the oral cavity, the paranasal sinuses, and the pharynx, each with specific functions and features.
Nose and nasal cavity
The nose and nasal cavity represent the main external openings of the respiratory tract.
Nose and nasal cavity
The nose and nasal cavity represent the main external openings of the respiratory tract.
01:24Nose and Nasal Cavity
The nose is composed of an observable exterior segment (external nose) and an internal segment within the skull known as the nasal cavity (internal nose). The external nose, visible on the face, consists of a framework of bone and hyaline cartilage enveloped in skin and muscle and lined with a mucous membrane. This structure is supported by the frontal bone, nasal bones, and maxillary bone and is supplemented by a cartilaginous framework comprising the septal nasal cartilage, lateral nasal...
01:27Cranial Bones: Lateral View
The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...