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Park and Oh: A Case of Orbital Invasion of an Ameloblastoma
Case Report

Journal of the Korean Ophthalmological Society 2017; 58(10): 1189-1193.

Published online: 11 October 2017

DOI: https://doi.org/10.3341/jkos.2017.58.10.1189

A Case of Orbital Invasion of an Ameloblastoma

So Young Park, MD, Dong Eun Oh, MD

Department of Ophthalmology, Veterans Health Service Medical Center, Seoul, Korea.

Address reprint requests to Dong Eun Oh, MD. Department of Ophthalmology, Veterans Health Service Medical Center, #53 Jinhwangdo-ro 61-gil, Gangdong-gu, Seoul 05368, Korea. Tel: 82-2-2225-1379, Fax: 82-2-2225-1485, ezer75@hanmail.net

Received 6 July 2017       Revised 16 August 2017       Accepted 24 September 2017

©2017 The Korean Ophthalmological Society

The Korean Ophthalmological Society

(open-access):

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Purpose

To report a case of orbital invasion of ameloblastoma.

Case summary

A 69-year-old male patient was referred to the ophthalmologist from an otorhinolaryngology clinic due to mass invasion of the orbit on computed tomography. The patient had a history of ameloblastoma of the left maxilla, which had been diagnosed in 1988, and for which he had undergone left maxillectomy. He was transferred from a private hospital because of suspected tumor after frequent epistaxis at the left nasal cavity of about 1 year. The biopsy report confirmed that the mass was a recurrence of the ameloblastoma, and a 17.4 × 22.7 × 23.5-mm-sized mass that filled the left ethmoid sinus and invaded the nasal side of the orbit was found on paranasal sinus magnetic resonance imaging. There was no limitation of eye movement in any field of gaze in the left eye even though the patient reported diplopia. After maximum resection of the tumor using a debrider with endoscope, the size of the tumor was reduced and the symptom of diplopia was resolved. The patient will undergo continuous follow-up.

Conclusions

Ameloblastoma is rare among orbital tumors originating from the paranasal sinus. We experienced a case of maxillary ameloblastoma involving the orbit. However, close monitoring should be administered to patients with such a tumor.

Keywords: Ameloblastoma, Orbital invasion, Recurrence

Figures and Tables

Figure 1

Clinical photograph on the first visit. It shows inferior displacement of left orbit due to previous left maxillectomy.

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Figure 2

Well defined mass from left ethmoid sinus to medial orbit wall on magnetic resonance (MR) images. The mass shows low signal intensity on T1-weighted image (A, B) and high signal intensity on T2-weighted image (C, D) (arrow).

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Figure 3

Histopathologic findings. The biopsy specimen shows plexiform pattern blanding ameloblastic cells arranged in anastomosing strands (Hematoxylin and eosin [HE] stain, ×200, HE stain, ×400) (A, B) (arrow). Immunohistopathology staining shows all negative result in CK7, CK20, CD117 and alpha smooth muscle actin (SMA) (C-F).

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Figure 4

Coronal orbit computed tomography (CT) images showing an mass in paranasal sinus (arrow). (A) Pre-op CT image shows the same as Fingure 2. (B) Post-op CT image shows much improved infiltrated lesion after 3 days.

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Notes

This study was presented as a narration at the 113th Annual Meeting of the Korean Ophthalmological Society 2015.

Conflicts of Interest The authors have no conflicts to disclose.

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