Question:easy
An auto-rickshaw ran over a child's thigh, leaving a mark of the tyre tracks. This is a
An auto-rickshaw ran over a child's thigh, leaving a mark of the tyre tracks. This is a
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A bruise that reproduces the exact shape of the impacting object has a special name.
Updated On: Jun 24, 2026
- Contact bruise
- Patterned bruise
- Imprint abrasion
- Pressure bruise
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The Correct Option is B
Solution and Explanation
The decisive clue here is that the injury carries the shape of the object that caused it, namely the tread of the tyre. In forensic terminology, any contusion that faithfully copies the outline of the striking surface is termed a patterned bruise, sometimes described as an imprint or stamp bruise.
The mechanism is worth understanding. When a heavy tread presses on skin, the ridges squeeze blood out of the directly compressed lines, while blood pools under the grooves between the ridges. The result is a set of parallel marks that recreate the tyre pattern, allowing the investigator to identify the offending vehicle.
Going through the alternatives clarifies the choice. The term contact bruise is generic and does not convey the idea of an object's shape being copied. An imprint abrasion would apply if the surface epidermis were scraped off, but the stem specifies a bruise, which is a deeper bleed into tissue rather than a graze. A pressure bruise is associated with prolonged squeezing such as strangulation marks, which is a different scenario from a wheel passing over a limb.
Therefore the tyre track left on the child's thigh is best classified as a patterned bruise.
\[\boxed{\text{Patterned bruise}}\]
The mechanism is worth understanding. When a heavy tread presses on skin, the ridges squeeze blood out of the directly compressed lines, while blood pools under the grooves between the ridges. The result is a set of parallel marks that recreate the tyre pattern, allowing the investigator to identify the offending vehicle.
Going through the alternatives clarifies the choice. The term contact bruise is generic and does not convey the idea of an object's shape being copied. An imprint abrasion would apply if the surface epidermis were scraped off, but the stem specifies a bruise, which is a deeper bleed into tissue rather than a graze. A pressure bruise is associated with prolonged squeezing such as strangulation marks, which is a different scenario from a wheel passing over a limb.
Therefore the tyre track left on the child's thigh is best classified as a patterned bruise.
\[\boxed{\text{Patterned bruise}}\]
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