Name:
10.3171/2025.1.FOCVID24197
Description:
10.3171/2025.1.FOCVID24197
Thumbnail URL:
https://cadmoremediastorage.blob.core.windows.net/bec1886e-70df-432f-bcbd-9be6d08ff621/videoscrubberimages/Scrubber_118.jpg
Duration:
T00H05M34S
Embed URL:
https://stream.cadmore.media/player/bec1886e-70df-432f-bcbd-9be6d08ff621
Content URL:
https://cadmoreoriginalmedia.blob.core.windows.net/bec1886e-70df-432f-bcbd-9be6d08ff621/16. 24-197.mp4?sv=2019-02-02&sr=c&sig=roltcYddRMR%2BGHmnN8LRHocA%2FsmDGicbaJ6mmYZXKfM%3D&st=2025-10-03T07%3A08%3A20Z&se=2025-10-03T09%3A13%3A20Z&sp=r
Upload Date:
2025-02-18T00:00:00.0000000
Transcript:
Language: EN.
Segment:0 .
[MUSIC PLAYING]
SPEAKER: We present a case of a large orbital cavernous hemangioma resected through a combined transorbital neuroendoscopic and endoscopic endonasal approach. The patient is a 40-year-old male who presented with right proptosis and vision loss for about 5 months. He also endorsed double vision with right lateral gaze. Neuro-ophthalmology evaluation demonstrated right optic neuropathy with evidence of optic nerve edema on optical coherence tomography as well as inferior visual field loss of the right eye.
SPEAKER: MRI workup revealed a well-defined T2 hyperintense medial intraconal lesion. On early post-gadolinium sequences, the lesion initially demonstrated patchy enhancement. On subsequent delayed postcontrast sequences, it demonstrated progressive filling to a homogeneous enhancing lesion. This progressive filling is typically considered a pathognomonic radiographic sign of cavernous hemangiomas.
SPEAKER: Various approaches have been described for intraorbital hemangiomas, and the choice of the approach depends on the lesion size, location, and relation to intraorbital structures. This lesion in particular is located in the medial inferior quadrant of the orbit. Given the vascular nature of these lesions, en bloc resection is typically preferred. Given the large size of this tumor and an already compromised right optic nerve, we wanted to minimize retraction and manipulation of the intraorbital contents.
SPEAKER: A natural dissection corridor in this case is between the medial and inferior rectus muscles coming medially. However, given the anterior extent of the tumor and to protect the rectus muscles, a transcaruncular endoscopic approach was also done to isolate the muscles, localize the tumor, and dissect the anterior aspect of the tumor. The medial orbitotomy then allows for orbital decompression and delivery of the tumor away from the critical centrally located optic nerve without retraction.
SPEAKER: We first begin with a unilateral anterior and posterior ethmoidectomy and medial orbitotomy. The lamina papyracea on the right side was exposed to the orbital apex, identifying periorbita. A transcaruncular approach was then performed to identify the medial and inferior rectus muscles. They were isolated with vessel loops to allow for mobilization.
SPEAKER: Once the intraconal corridor is developed, the anterior and lateral portions of the tumor were identified and dissected free from the intraorbital contents. We then turned our attention to the endoscopic endonasal exposure. Using the vessel loops, we were able to identify the corridor between the medial and inferior rectus muscles.
SPEAKER: The paraorbita was then opened sharply along this corridor. The extraconal fat is reduced using endoscopic bipolars. The medial and inferior rectus muscles can be gently retracted through the transcaruncular approach to widen the corridor. This also allows them to be less compressible and easier to dissect between. Using bimanual techniques, the tumor is then sharply dissected using endoscopic scissors.
SPEAKER: The tumor capsule was then bipolared and mobilized. Working systematically circumferentially around the tumor, the remaining soft tissue tumor attachments are then incised, and the tumor is removed and delivered en bloc through the endonasal corridor.
SPEAKER: Once the tumor is removed, hemostasis is obtained. The extraconal fat is placed back over the muscles to prevent scarring, and a free mucosal graft is placed over the area for reconstruction. The transcaruncular approach requires no closure. Postoperative MRI demonstrated complete tumor resection without evidence of residual disease. The patient had improvement in proptosis, and ophthalmology evaluation demonstrated resolution of right optic nerve swelling and neuropathy.
SPEAKER: The patient had an excellent cosmetic result with no evidence of extraocular movement dysfunction. Our case highlights the advantages of the combined transorbital neuroendoscopic and endoscopic endonasal approach for resection of intraorbital lesions in the inferior medial quadrant. The endoscopic endonasal approach minimizes external scarring with improved cosmesis. It also allows for enhanced visibility and minimal disruption of intraconal contents, while the transcaruncular approach allows for early identification and isolation of surrounding rectus muscles, which widens the natural corridor for a safe and effective en bloc resection.
SPEAKER:
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