Related Experiment Video
Updated: Oct 5, 2025

08:18
Three-Dimensional Reconstruction of Orbital Fractures
Published on: May 16, 2025
352
Presenting features for developmental cysts of the orbit.
Caroline Wilde1, Kaveh Vahdani1, Caroline Thaung2
1Orbital Service, Moorfields Eye Hospital, London, EC1V 2PD, UK.
Eye (London, England)
|January 22, 2022
Summary
Orbital developmental cysts present varied clinical features, with dermoid and epidermoid types being most common. Conjunctival cysts are less inflamed and typically located medially.
Area of Science:
- Ophthalmology
- Pathology
- Surgical Science
Background:
- Orbital developmental cysts encompass a spectrum of lesions, ranging from common dermoid cysts to rare respiratory epithelial-lined cysts.
- Understanding their diverse clinical presentations and histological subtypes is crucial for accurate diagnosis and management.
Purpose of the Study:
- To evaluate the clinical features of developmental cysts of the orbit.
- To correlate cyst location and histological type with presenting symptoms and signs.
Main Methods:
- Retrospective study of 358 patients who underwent surgical excision of orbital cysts between 1992 and 2020.
- Analysis of patient demographics, presenting features, cyst location, and histological findings.
Main Results:
- The most common presenting features were peribulbar lumps, eyelid swelling, proptosis, pain, and reduced vision.
- Epidermoid, sebaceous, and keratinised dermoid cysts predominantly affected the superotemporal quadrant, while conjunctival cysts were typically medial.
- Histologically, keratinised epithelium with dermal structures was most frequent (63%), followed by non-keratinised epithelium with dermal structures (19%). Chronic inflammation was observed in 66% of cysts, with granuloma formation in 50%.
Conclusions:
- Orbital developmental cysts exhibit diverse clinical and histological characteristics.
- Conjunctival cysts are less inflamed and favor the superonasal quadrant, whereas deeper respiratory cysts may present later in life.
Related Concept Videos
Accessory Structures of the Eye
2.0K
Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
2.0K
Cranial Bones: Lateral View
3.0K
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...
3.0K
Glaucoma: Overview
949
Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
949
Cranial Bones: Superior and Posterior View
3.3K
The superior view of the cranium shows the frontal and paired parietal bones.
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,...
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,...
3.3K
Anatomy of the Eyeball
7.7K
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle...
7.7K
Ovaries
1.4K
The ovaries are roughly the size of almonds and measure approximately 2 to 3 centimeters in length. These paired structures are situated within the pelvic region and are anchored by the mesovarium—a peritoneal extension that also connects them to the wider structure of the broad ligament. The support system extends to the suspensory ligament, housing blood and lymphatic vessels. In addition, the ovarian ligament tethers the ovaries to the uterus.
On the ovarian surface, a layer of...
On the ovarian surface, a layer of...
1.4K

