In
head and neck cancer,
Ohngren's line is a
line
Line most often refers to:
* Line (geometry), object with zero thickness and curvature that stretches to infinity
* Telephone line, a single-user circuit on a telephone communication system
Line, lines, The Line, or LINE may also refer to:
Arts ...
that connects the
medial canthus of the
eye
Eyes are organs of the visual system. They provide living organisms with vision, the ability to receive and process visual detail, as well as enabling several photo response functions that are independent of vision. Eyes detect light and conv ...
to the
angle of the mandible.
The line defines a
plane
Plane(s) most often refers to:
* Aero- or airplane, a powered, fixed-wing aircraft
* Plane (geometry), a flat, 2-dimensional surface
Plane or planes may also refer to:
Biology
* Plane (tree) or ''Platanus'', wetland native plant
* Planes (gen ...
orthogonal
In mathematics, orthogonality is the generalization of the geometric notion of ''perpendicularity''.
By extension, orthogonality is also used to refer to the separation of specific features of a system. The term also has specialized meanings in ...
to a
sagittal plane that divides the
maxillary sinus into (1) an
anterior
Standard anatomical terms of location are used to unambiguously describe the anatomy of animals, including humans. The terms, typically derived from Latin or Greek roots, describe something in its standard anatomical position. This position prov ...
-
inferior
Inferior may refer to:
* Inferiority complex
* An Anatomical terms of location#Superior and inferior, anatomical term of location
* Inferior angle of the scapula, in the human skeleton
*Inferior (book), ''Inferior'' (book), by Angela Saini
* ''The ...
part, and (2) a
superior
Superior may refer to:
*Superior (hierarchy), something which is higher in a hierarchical structure of any kind
Places
*Superior (proposed U.S. state), an unsuccessful proposal for the Upper Peninsula of Michigan to form a separate state
*Lake ...
-
posterior part.
Tumours that arise in the anterior-inferior part, i.e. below Ohngren's line, generally have a better prognosis than those in the other group.
Addition to above a vertical line through pupil is also considered, which divides the above-mentioned structures into 4 different regions.
The structures at posterosuperior medial have worst prognosis and that at anteroinferior medial are least dangerous.
References
{{Reflist, 2
External links
Diagram showing Ohngren's line (imaging.consult.com)
Head and neck cancer