Publications by authors named "Qi Xiong Ng"

3 Publications

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A rare case of unilateral Cogan's anterior internuclear ophthalmoplegia, upgaze palsy and ataxia caused by dorsal tegmentum lesion at pontomesencephalic junction.

BMC Ophthalmol 2021 Feb 25;21(1):105. Epub 2021 Feb 25.

Universiti Malaysia Sarawak (UNIMAS), Kota Samarahan, Sarawak, Malaysia.

Background: Cogan's anterior internuclear ophthalmoplegia (INO) is characterized by INO with inability to converge and commonly thought to be due to rostral midbrain lesion. A lesion outside midbrain that causes unilateral Cogan's anterior INO combined with upgaze palsy and ataxia are rarely described.

Case Presentation: A 67-year old male presented with left Cogan's anterior internuclear ophthalmoplegia (INO), left appendicular ataxia and bilateral upgaze palsy. A Magnetic Resonance Imaging (MRI) and Magnetic Resonance Angiography (MRA) brain showed a left dorsal tegmental infarct at the level of pontomesencephalic junction.

Conclusions: This case highlights the clinical importance of Cogan's anterior INO in combination with upgaze palsy and ataxia, and report possible site of lesion in patients with such constellation. Clinicians should consider looking for cerebellar signs in cases of Cogan's anterior INO, apart from just considering localizing the lesion at the midbrain.
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http://dx.doi.org/10.1186/s12886-021-01868-9DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7908666PMC
February 2021

Iatrogenic intralenticular broken steroid implant: a case report.

J Med Case Rep 2019 May 6;13(1):131. Epub 2019 May 6.

Universiti Malaysia Sarawak (UNIMAS), Kota Samarahan, Sarawak, Malaysia.

Background: This is a case report of an iatrogenic intralenticular broken steroid (Ozurdex™) implant in a patient with uveitis. There are only a few case reports on broken Ozurdex™ implants in the vitreous cavity, with none of them involving the crystalline lens. A few authors have described the accidental injection of an Ozurdex™ implant into the crystalline lens, but all of the implants remained in one piece in the lens and none of them were broken. We report an unusual case of an Ozurdex™ implant which was injected inadvertently into the crystalline lens, resulting in a broken Ozurdex™ implant with an entry and exit wound through the posterior capsule of the lens.

Case Presentation: An ophthalmic trainee performed an Ozurdex™ intravitreal injection into a 48-year-old Asian man's right eye under aseptic conditions. This patient was then followed up for further management. On day 7 post-procedure, a slit lamp examination revealed that the Ozurdex™ implant was injected into the intralenticular structure of his right eye and had fractured into two pieces. The posterior capsule of the right lens was breached, with one half of the Ozurdex™ implant stuck at the entry and the other stuck at the exit wound of the posterior capsule. This patient underwent right eye cataract extraction and repositioning of the fractured implant; he made an uneventful recovery.

Conclusions: Ophthalmologists should be aware of the potential risk of injecting an Ozurdex™ implant into an anatomical structure other than the vitreous cavity. Adequate training and careful administration of the Ozurdex™ implant are necessary to avoid such a complication, which fortunately is rare.
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http://dx.doi.org/10.1186/s13256-019-2064-1DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6501317PMC
May 2019

A Review Of Oculoplastic Photography: A Guide For Clinician Photographers.

Cureus 2016 Aug 11;8(8):e733. Epub 2016 Aug 11.

Ophthalmology, University of Malaya.

Clinical photography in the field of oculoplastic surgery has many applications. It is possible for clinicians to obtain standardized clinical photographs without a studio. A clinician photographer has the advantage of knowing exactly what to photograph as well as having immediate access to the images. In order to maintain standardization in the photographs, the photographic settings should remain constant. This article covers essential photographic equipment, camera settings, patient pose, and digital asset management.
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http://dx.doi.org/10.7759/cureus.733DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5017881PMC
August 2016