Related Experiment Video
Updated: May 17, 2026

04:34
Surgical Treatment of an Endolymphatic Sac Tumor
Published on: May 26, 2023
An unusual foreign body in the mastoid process
Summary
A child sustained a mastoid bone injury from a pen refill without initial symptoms. This case highlights unusual foreign body penetration into the mastoid process.
Area of Science:
- Otolaryngology
- Pediatric Traumatology
Background:
- Foreign body penetration of the mastoid process is rare.
- Unusual presentations can delay diagnosis and treatment.
Purpose of the Study:
- To report a unique case of a child with a metallic pen refill lodged in the mastoid bone.
- To emphasize the importance of considering atypical presentations in pediatric head trauma.
Main Methods:
- Case report detailing clinical presentation, diagnostic imaging, and management.
- Review of relevant literature on pediatric mastoid foreign bodies.
Main Results:
- A plastic pen refill with a metallic end penetrated the mastoid bone.
- The foreign body remained asymptomatic and undetected under the skin initially.
- Diagnosis was confirmed via imaging, and surgical removal was successful.
Conclusions:
- Atypical foreign body injuries to the mastoid require high clinical suspicion.
- Prompt diagnosis and intervention are crucial for preventing complications in pediatric patients.
More Related Videos
Related Concept Videos
Anatomy of the Ear
Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...
Brain Abscess l: Introduction
A brain abscess is a focal, intracerebral infection characterized by a localized collection of pus within the brain parenchyma, resulting from microbial invasion and the body’s inflammatory response. It progresses through stages: early and late cerebritis, followed by early and late capsule formation, reflecting tissue destruction, immune response, and eventual encapsulation.Etiology and PathogenesisCausative organisms vary with source and host factors, often involving polymicrobial infections,...
The Auditory Ossicles
The auditory ossicles of the middle ear transmit sounds from the air as vibrations to the fluid-filled cochlea. The auditory ossicles consist of two malleus (hammer) bones, two incus (anvil) bones, and two stapes (stirrups), one on each side. These bones develop during the fetal stage and are the ones to ossify first. They are fully mature at birth and do not grow afterward.
The aptly named stapes look very much like a stirrup. The three ossicles are unique to mammals, and each plays a role in...
The aptly named stapes look very much like a stirrup. The three ossicles are unique to mammals, and each plays a role in...
Cranial Bones: Lateral View
The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
The Cochlea
The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.

