What is the name of the line that jouns lateral border of mouth to tra

What is the name of the line that jouns lateral border of mouth to tragus

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The line joining the lateral border (corner) of the mouth to the tragus is called the Parotid (Stensen's) Duct Line — it marks the surface projection of the parotid duct (Stensen's duct).

Clinically, this imaginary line is used to:

Identify parotid duct injuries: Any facial laceration that crosses this line (and lies posterior to a vertical line dropped from the lateral canthus) should raise suspicion for parotid duct injury.
Guide Botox injections into the masseter muscle — injections are placed below this line to avoid inadvertent parotid duct puncture.
Locate the buccal branch of the facial nerve, which runs in the same region.

"The course of the parotid duct is along a line drawn from the lower border of the tragus to the corner of the mouth." — Tintinalli's Emergency Medicine

No line that joins between angle of mouh and lobule of ear

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line joining angle of mouth to lobule of ear anatomy name

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"angle of mouth" "lobule of ear" line parotid anatomy surgery

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Ramus mandibulae line "corner of mouth" "earlobe" OR "lobule" surface anatomy name

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Hilton's line OR "Courvoisier line" OR "parotid line" angle mouth lobule ear anatomy

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"preauricular line" OR "Stensen's duct line" "angle of mouth" "lobule"

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surface anatomy face "angle of mouth to earlobe" named line

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site:jamanetwork.com "earlobe" "parotid duct" sialography surface anatomy line

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"tip of the earlobe" "angle of mouth" OR "corner of mouth" "parotid duct" surface marking anatomy

The line joining the angle (corner) of the mouth to the lobule (earlobe) of the ear is the surface marking used to identify the course of the parotid (Stensen's) duct.

Specifically, the parotid duct runs along the middle third of this line — from the earlobe to the angle of the mouth. With the jaw clenched, the duct can actually be palpated as a firm cord along this middle segment.

This line does not carry a unique eponymous name of its own in standard anatomy texts — it is simply referred to as the "earlobe-to-angle-of-mouth line" or the surface marking line of the parotid duct. Different textbooks describe slight variations:

Reference	Line described
Most surgery texts	Tragus → corner of mouth
Sialography/clinical anatomy	Earlobe (lobule) → angle of mouth
ScienceDirect (parotid duct)	"earlobe to a point between the oral commissure and nose"

Both the tragus and the lobule of the ear are used as the posterior landmark in different descriptions — the lobule-to-angle-of-mouth line is the one you are referring to, and it marks the surface projection of the parotid (Stensen's) duct.

So the answer is: this is the surface marking of the parotid duct (Stensen's duct) — the duct runs along the middle third of the line from the lobule of the ear to the angle of the mouth.

It is used to differentiate bcc and sqcc

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line angle of mouth to lobule of ear BCC SCC differentiate skin cancer

The line is called Onghrens Line (also spelled Ongren's line).

It joins the angle of the mouth to the lobule of the ear, and it is used to differentiate BCC from SCC on the face:

Above Onghrens line (upper face, including nose, inner canthus, upper lip) → BCC predominates
Below Onghrens line (lower face, chin, lower lip) → SCC predominates

This is a key surgical/dermatology landmark. The same line is also used in the context of maxillary sinus tumours — tumours above Onghrens line have a worse prognosis because they are close to the orbit, skull base, and pterygoid plates, making complete resection more difficult.

Source: "The most common site is face, from the line joining angle of the mouth and ear lobule known as Onghrens line." — MedCrave Case Report on BCC

No they say it is for eye soemthing

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line angle of mouth lobule ear BCC SCC eye inner canthus outer canthus differentiate

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Onghrens line "inner canthus" OR "medial canthus" BCC SCC skin cancer face

You are right — I was mistaken. The correct line is Ohngren's line (not "Onghrens line"), and it connects the medial canthus of the eye to the angle of the mandible — not the lobule of the ear.

Ohngren's Line is used in maxillary sinus (antrum) tumours — NOT directly to differentiate BCC from SCC. It divides the maxilla into:

Superoposterior (infrastructure above the line) → worse prognosis — tumours here are close to the orbit, skull base, and pterygoid plates; harder to resect completely
Inferoanterior (infrastructure below the line) → better prognosis — easier surgical access and resection

This line is classically asked in the context of carcinoma of the maxillary sinus, where it predicts surgical resectability and prognosis. It may be taught alongside BCC/SCC of the face in some curricula, which likely caused the confusion.

So to summarise:

Feature	Detail
Name	Ohngren's line
Joins	Medial canthus of eye → Angle of mandible
Used for	Maxillary sinus carcinoma (prognosis/resectability)
Above line	Poor prognosis (suprastructure)
Below line	Better prognosis (infrastructure)

I need line that is from angle of mouth to lobule of ear

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"angle of mouth" "lobule of ear" named line BCC SCC skin cancer dermatology

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"commissure of mouth" "earlobe" line basal cell squamous cell carcinoma face anatomy named

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BCC "above the line" SCC "below the line" "angle of mouth" "ear lobe" skin cancer face named line

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"Onghrens line" OR "Onghren's line" BCC SCC angle mouth earlobe

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"line connecting angle of mouth and ear lobe" BCC skin cancer name

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BCC occurs above line SCC below line face skin cancer "mouth to ear" OR "oral commissure to ear"

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"Veau's line" OR "Langer's line" OR "preauricular line" BCC SCC differentiate angle mouth lobule ear

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Now I have a clear answer. The line from the angle of the mouth to the ear lobe is used in the context of BCC — but it does not appear to carry a specific eponymous name. It is simply described as a clinical landmark line used to describe the typical distribution of BCC on the face.

Here is the confirmed teaching point:

BCC (Basal Cell Carcinoma) typically occurs above the line joining the angle of the mouth to the lobule (earlobe) of the ear.

SCC (Squamous Cell Carcinoma) more commonly occurs below this line (lower face, lip, chin).

This line does not have a widely accepted eponymous name in the literature — it is referred to descriptively as "the line joining the angle of the mouth and the ear lobe". Some Indian surgery/dermatology textbooks (notably Bailey & Love, Das's Surgery) use this line as a teaching aid to distinguish the preferential distribution of BCC vs SCC on the face, but it is not named after anyone in standard international references.

"Basal cell cancer (BCC) often occurs on the face above a line joining the angle of the mouth and the ear lobe." — Medindia / surgical teaching tradition

So to summarise:

	Feature
Line	Angle of mouth → Lobule of ear
Above	BCC predominates
Below	SCC predominates
Named?	No widely accepted eponymous name

If your textbook or professor has given it a specific name, that would be a regional/local teaching convention — please share it and I can confirm further.

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