Related Experiment Video
Updated: Jul 18, 2026

Endoscopic Endonasal Trans-sphenoidal Approach: Minimally Invasive Surgery for Pituitary Adenomas
Published on: January 17, 2018
An unusual foreign body: a ball bearing in the posterior ethmoid sinus
Arif Sanli1, Mehmet Eken, Sedat Aydin
1Department of Otolaryngology, Dr. Lütfi Kirdar Training and Research Hospital, Istanbul, Turkey.
Abstract:
Globe perforation was detected in an 18-year-old male patient having total vision loss in the left eye following a car accident. The middle meatus could not be evaluated by sinonasal endoscopy because of edema. Computed tomography showed a foreign body in the left posterior ethmoid sinus, with a trajectory coursing from the globe to the lamina papyracea, and the posterior ethmoid sinus. Endoscopic sinus surgery was performed including a left uncinectomy, anterior and posterior ethmoidectomies, and the foreign body was removed from the posterior ethmoid sinus using ethmoid forceps. It turned out to be a ball bearing. After three months of follow-up, the patient had no evidence for rhinologic sequelae.
Related Concept Videos
Cranial Bones: Lateral View
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...
Nose and Nasal Cavity
Brain Abscess l: Introduction
Epistaxis
Etiology
Possible causes of this condition include high blood pressure, trauma, low humidity, upper respiratory tract infections, allergies, foreign bodies, nasal inhalation of corticosteroids or illicit drugs, excessive use of decongestant nasal sprays, facial or nasal surgery, anatomic malformation, tumors, or systemic...
Anatomy of Respiratory System I: Upper Respiratory Tract
Nose and nasal cavity
The nose and nasal cavity represent the main external openings of the respiratory tract.
Cranial Bones: Superior and Posterior View
The frontal bone is the single bone that forms the forehead. At its anterior midline, between the eyebrows, there is a slight depression called the glabella. The frontal bone also forms the supraorbital margin of the orbit. Near the middle of this margin is the supraorbital foramen, the opening that provides passage for a sensory nerve to the forehead. The frontal bone is thickened just above each supraorbital margin,...