Question:easy
Scutum is present in which part of the middle ear?
Scutum is present in which part of the middle ear?
Show Hint
It is the shield-shaped bony spur above the tympanic membrane.
Updated On: Jun 24, 2026
- Roof
- Lateral wall
- Medial wall
- Floor
Show Solution
The Correct Option is B
Solution and Explanation
Step 1: The middle ear is a box with six walls. The lateral wall faces the external ear and is dominated by the tympanic membrane.
Step 2: Sitting above the tympanic membrane, at the boundary of the attic, is a small bony spur shaped like a shield. This is the scutum, and it belongs to the lateral wall.
Step 3: Radiologically, blunting or destruction of the scutum points to an attic cholesteatoma, which is why this landmark is clinically tested.
Step 4: Roof, medial wall and floor are distinct from the scutum's location, so they are excluded.
\[\boxed{\text{Lateral wall}}\]
Step 2: Sitting above the tympanic membrane, at the boundary of the attic, is a small bony spur shaped like a shield. This is the scutum, and it belongs to the lateral wall.
Step 3: Radiologically, blunting or destruction of the scutum points to an attic cholesteatoma, which is why this landmark is clinically tested.
Step 4: Roof, medial wall and floor are distinct from the scutum's location, so they are excluded.
\[\boxed{\text{Lateral wall}}\]
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