Both frontal sinuses
have their ostia at the most dependent portion of the cavity (posteromedial).
A follow-up MRI scan in 2009 showed contrast-enhancing soft tissue abnormalities within both of the frontal sinuses
and the left ethmoid sinus (Figures 1 and 2).
1,2) These include: paranasal sinusitis, especially of the frontal sinuses
(1-14) with the extension of infection from the sphenoid and ethmoid sinuses being relatively uncommon; (2) osteomy-elitis of the skull, which can be associated rarely with Pott's Puffy Tumor; (3,4,5) direct extension from the middle ear, the mastoid, or the orbit; trauma resulting in skull fracture; iatrogenic causes like craniotomy, skull traction for cervical fractures or scalp venous catheters in the pediatric population; (6) and hematological spread from a remote focus of infection.
Contiguous noncontrast coronal 2-mm slices were obtained extending from the anterior frontal sinuses
to 2 cm posterior to the posterior wall of the frontal sinuses
; in addition, contiguous 5-mm slices to the posterior wall of the sphenoid sinus were performed.
These cavities, located within the skull or bones of the head surrounding the nose, include the frontal sinuses
over the eyes in the brow area; the maxillary sinuses inside each cheekbone; the ethmoids just behind the bridge of the nose and between the eyes; and behind them, the sphenoids in the upper region of the nose and behind the eyes.
A new Frontal Handpiece is designed for the frontal sinuses
with a 2.
In this article, we describe our use of this approach to excise an extensive sinonasal hemangiopericytoma involving the left maxillary sinus, the left ethmoid sinus, and both frontal sinuses
2 mm diameter with fixed 80x articulation for access to the hard-to-reach frontal sinuses
Agenesis of the paranasal sinuses is an uncommon anatomic variation; it mainly appears in the frontal sinuses
(12% of individuals) and next most often in the maxillary sinuses (5 to 6%).
This unique feature is designed to allow surgeons to perform medial and lateral cutting in the frontal sinuses
, a more complete removal of polyps and mucin in the maxillary sinuses, and improves access to target tissue in the lateral and posterior areas of the airway.
Computed tomography (CT) demonstrated opacification of the frontal sinuses
bilaterally (figure, A); the ethmoid, sphenoid, and maxillary sinuses were clear.
We describe our technique using the case of a 42-year-old man whose sinus CT scan demonstrated partial opacification at the base of both frontal sinuses
In that report, Mahindra et al described the case of a 12-year-old boy whose tumor involved the maxillary, ethmoid, and frontal sinuses
6) In our patient, CT showed osteolytic destruction and the presence of a soft-tissue mass that extended into the anterior ethmoid sinus and the posterior wall of the frontal sinuses
, a finding that suggested the possibility of a malignancy.
She eventually underwent computed tomography (CT), which detected marked sinusitis with opacification of the left ethmoid and frontal sinuses