12 year old presented with a focal wound in the left aspect of the perineum.
According to the mother the boy came back from school with a perineal injury with no clear history or cause -said to be a fall. The boy initilally appeared hesitant to reveal the exact cause.
A few days later mother noticed fluid oozing from the wound with pieces of lead being extruded.
Boy was seen by a surgeon who referred him for an MRI.
Images demonstrates a linear hypointense signal structure (arrow) lying in the left obturator externus with surrounding muscle edema.
Further history according to the boy then revealed that at school an upright pencil was placed on the seat of the boy's chair by the adjacent student as a prank just prior to the boy attempting to sit down - thus pierced through the left perineum - Ouch!!!
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