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Pterygia

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https://www.readbyqxmd.com/read/28938377/long-term-stability-of-keratometry-scheimpflug-derived-true-net-power-and-total-corneal-refractive-power-after-primary-pterygium-excision
#1
Ka Wai Kam, Timothy A Kuan, Michael W Belin, Alvin L Young
PURPOSE: To evaluate long-term changes in mean keratometry, astigmatism, true net power (TNP), and total corneal refractive power (TCRP) of corneas after primary pterygium excision. METHODS: This is a prospective observational series conducted at a tertiary teaching hospital eye center in Hong Kong. A total of 31 eyes of 31 patients with primary pterygium excision were included. Patients with recurrent or double-headed pterygia or a history of corneal scars from previous trauma, infection, or surgery were excluded...
September 21, 2017: Cornea
https://www.readbyqxmd.com/read/28922327/releasable-single-suture-for-primary-pterygium-excision-with-a-conjunctival-autograft
#2
Gautam Singh Parmar, Sachin Arya, Ashok Kumar Meena, Bhushan Ghodke, Elesh Jain, Budhendra Jain
PURPOSE: To evaluate the efficacy of a releasable single suture for pterygium excision with a conjunctival autograft (CAG). METHODS: Retrospective case series at a tertiary eye care center in central India was conducted. Medical records of 150 patients, who underwent primary pterygium excision with a CAG secured by a single releasable 10-0 nylon suture in the last year were reviewed. The surgical duration was noted. The suture was released on the first postoperative day under topical anesthesia...
September 15, 2017: Cornea
https://www.readbyqxmd.com/read/28873177/hypoxia-inducible-factor-dependent-expression-of-angiopoietin-like-4-by-conjunctival-epithelial-cells-promotes-the-angiogenic-phenotype-of-pterygia
#3
Qianli Meng, Yaowu Qin, Monika Deshpande, Fabiana Kashiwabuchi, Murilo Rodrigues, Qiaozhi Lu, Hui Ren, Jennifer H Elisseeff, Gregg L Semenza, Silvia V Montaner, Akrit Sodhi
Purpose: Disappointing results from clinical studies assessing the efficacy of therapies targeting vascular endothelial growth factor (VEGF) for the treatment of pterygia suggest that other angiogenic mediators may also play a role in its development. We therefore explore the relative contribution of VEGF, hypoxia-inducible factor (HIF)-1α (the transcription factor that regulates VEGF expression in ocular neovascular disease), and a second HIF-regulated mediator, angiopoietin-like 4 (ANGPTL4), to the angiogenic phenotype of pterygia...
September 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28844049/pterygia-are-indicators-of-an-increased-risk-of-developing-cutaneous-melanomas
#4
Julie M Crewe, Tim Threlfall, Antony Clark, Paul G Sanfilippo, David A Mackey
AIM: To investigate whether pterygium is an indicator of an increased risk of cutaneous melanoma (CM). METHODS: A matched-cohort study, using linked health administrative data sets to identify all hospital-treated pterygium in Western Australia (WA) between 1979 and 2014. We identified pterygium cases from hospital diagnosis and/or procedure International Classification of Diseases 9th revision (ICD-9) and 10th revision (ICD-10) codes and matched cases by age, sex and residential postcode to WA Electoral Roll controls with no known history of pterygium...
August 26, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28820791/teleophthalmic-approach-for-detection-of-corneal-diseases-accuracy-and-reliability
#5
Maria A Woodward, David C Musch, Christopher T Hood, Jonathan B Greene, Leslie M Niziol, V Swetha E Jeganathan, Paul P Lee
PURPOSE: Corneal and anterior segment diseases cause most of the urgent visits to eye care professionals. We evaluated the diagnostic accuracy of detecting corneal diseases using external photographs from 2 portable cameras for telemedicine purposes. METHODS: This is a prospective study of adults with a clinical diagnosis of corneal pathology including corneal abrasions, ulcers, scars, and pterygia. A cornea specialist provided the gold standard diagnosis by slit-lamp examination...
October 2017: Cornea
https://www.readbyqxmd.com/read/28803935/tnf-%C3%AE-upregulates-hif-1%C3%AE-expression-in-pterygium-fibroblasts-and-enhances-their-susceptibility-to-vegf-independent-of-hypoxia
#6
Kyoung Woo Kim, Soo Jin Lee, Jae Chan Kim
The clinical manifestations of pterygium are characterized by rapid growth and postoperative recurrences. We had previously proposed that hypoxia-inducible factor (HIF)-1α recruits progenitor cells during the development and progression of pterygia. Recently, it was reported that various stimuli, including inflammation, could activate HIF-1α even under normoxic conditions. The ocular surface directly faces external environments, and is thus frequently exposed to inflammatory insults. First, we examined the gene expression of HIF-1α, its downstream molecule, vascular endothelial growth factor (VEGF)-A, and VEGF receptor (VEGFR)-2 in corneal and conjunctival cells compared with cultured human umbilical vein endothelial cells...
August 10, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28634544/efficacy-of-subconjunctival-bevacizumab-injections-before-and-after-surgical-excision-in-preventing-pterygium-recurrence
#7
Raffaele Nuzzi, Federico Tridico
PURPOSE: To evaluate the efficacy of subconjunctival bevacizumab injections, before and after surgical excision with bare sclera technique, in preventing postoperative pterygium recurrence. MATERIAL AND METHODS: 83 eyes of 83 patients affected with primary pterygia underwent surgical excision. 42 eyes received two subconjunctival bevacizumab injections, at the dosage of 2.5 mg/0.1 ml, one week prior surgery and one week after intervention. Recurrence rate was evaluated among the two groups...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28614154/regression-of-inflamed-pterygia-by-frequent-high-dose-intralesional-ziv-aflibercept
#8
Ahmad M Mansour
PURPOSE: Intralesional single low-dose vascular endothelial growth factor antagonists have traditionally failed in causing regression of pterygia. The current pilot study investigates the role of high-dose repeated intralesional ziv-aflibercept in causing regression of inflamed or recurring pterygia. METHODS: This prospective study from January 2015 to April 2017 consisted of using high dose of ziv-aflibercept between 0.1 mL (2.5 mg) and 0.3 mL (7.5 mg), depending on the pterygium size and the degree of inflammation...
June 13, 2017: Cornea
https://www.readbyqxmd.com/read/28489720/expression-of-peroxiredoxin-2-and-vascular-endothelial-growth-factor-receptor-2-in-pterygium
#9
Yuchuan Wang, Jinyong Lin, Luxia Chen, Liming Wang, Peng Hao, Ruifang Han, Ming Ying, Xuan Li
PURPOSE: The expression of peroxiredoxin 2 and vascular endothelial growth factor receptor 2 (VEGFR2) was detected in pterygium to investigate whether they are involved in the pathogenesis or recurrence of pterygium and to evaluate the association between peroxiredoxin 2 and VEGFR2 in pterygium. METHODS: Ten normal bulbar conjunctivae, 35 primary pterygia, and 35 recurrent pterygia were obtained. Formalin-fixed, paraffin-wax-embedded tissues were analyzed by immunohistochemistry with peroxiredoxin 2 and VEGFR2 antibodies...
July 2017: Cornea
https://www.readbyqxmd.com/read/28410726/surgical-techniques-and-adjuvants-for-the-management-of-primary-and-recurrent-pterygia
#10
REVIEW
John A Hovanesian, Christopher E Starr, David T Vroman, Francis S Mah, Jose A P Gomes, Marjan Farid, Neda Shamie, Richard S Davidson, Thomas John, Edward J Holland, Terry Kim
The removal and rate of recurrence of pterygium have been discussed for years. The disorder is highly associated with environmental factors, and recurrence rates can be unacceptably high and cannot be successfully predicted. New techniques and graft preparations and postoperative management strategies are helping to reduce the recurrence rates and provide an ocular surface that is near ideal for future cataract or refractive surgery. This review discusses the advantages and disadvantages of various treatment strategies...
March 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28410547/endocan-overexpression-in-pterygium
#11
Raşit Kiliç, Ali Kurt, Murat Tad, Sedat Taşdemir
PURPOSE: The aim of this study was to evaluate the possible role of endocan in the pathogenesis of pterygium. METHODS: The study was conducted on 33 patients with primary pterygium and 20 control subjects with normal bulbar conjunctiva. Patients with pterygium were graded into 3 groups as atrophic, fleshy, and intermediate, according to the Tan classification. Primary nasal pterygia and normal bulbar conjunctivas were surgically removed. Endocan expression was immunohistochemically investigated...
June 2017: Cornea
https://www.readbyqxmd.com/read/28368995/proposal-for-a-novel-severity-grading-system-for-pterygia-based-on-corneal-topographic-data
#12
Kazunori Miyata, Keiichiro Minami, Atsushi Otani, Tadatoshi Tokunaga, Shouta Tokuda, Shiro Amano
PURPOSE: To propose a grading system of pterygium severity based on corneal higher-order irregularity (HOI) and to evaluate postoperative changes in corneal irregularity of the graded pterygia. METHODS: In 268 eyes of 226 patients undergoing excision surgery of primary nasal pterygium, Placido corneal topography images were taken before and until 6 months after surgery. The best-corrected visual acuity (BCVA) and pterygium size with respect to the corneal diameter were also measured...
July 2017: Cornea
https://www.readbyqxmd.com/read/28367523/stromal-cell-derived-factor-1-cxcr4-and-cxcr7-gene-transcripts-in-pterygia
#13
Shahram Bamdad, Behzad Khademi, Nooshin Chenari, Atta Taseh, Mahboobeh Razmkhah
PURPOSE: Pterygium is a pathologic process with angiogenic and tumor cell like characteristics. Chemokine and chemokine receptors may contribute to the formation and growth of pterygia. The aim of this study was to assess the expression of stromal cell derived factor (SDF)-1, as an angiogenic chemokine, and its receptors, CXCR4 and CXCR7, gene transcripts in pterygia. METHODS: RNA was extracted from tissue samples of 33 patients with primary pterygium and 35 volunteers with conjunctiva as the control group...
March 2017: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/28347855/role-of-high-resolution-optical-coherence-tomography-in-diagnosing-ocular-surface-squamous-neoplasia-with-coexisting-ocular-surface-diseases
#14
Marwan Atallah, Madhura Joag, Anat Galor, Guillermo Amescua, Afshan Nanji, Jianhua Wang, Victor L Perez, Sander Dubovy, Carol L Karp
PURPOSE: Coexistence of an ocular surface disease can mask the typical features of ocular surface squamous neoplasia (OSSN). The purpose of this study was to evaluate high resolution optical coherence tomography (HR-OCT) as an adjunct in the detection and differentiation of OSSN within coexisting ocular surface pathologies. METHODS: Retrospective study of 16 patients with ocular surface disease and lesions suspicious for OSSN that were evaluated with HR-OCT. HR-OCT images of the lesions were taken to look for evidence of OSSN...
March 24, 2017: Ocular Surface
https://www.readbyqxmd.com/read/28336317/lethal-multiple-pterygium-syndrome-a-severe-phenotype-associated-with-a-novel-mutation-in-the-nebulin-gene
#15
Ebtesam Abdalla, Gianina Ravenscroft, Louay Zayed, Sarah J Beecroft, Nigel G Laing
Fetal akinesia deformation sequence is a clinically and genetically heterogeneous disorder characterized by a variable combination of fetal akinesia, intrauterine growth restriction, developmental abnormalities such as cystic hygroma, hydrops fetalis, pulmonary hypoplasia, occasional arthrogryposis, and pterygia. The pathogenetic mechanisms of fetal akinesia deformation sequence include neuropathy, muscular disorders, neuromuscular junction disorders, maternal myasthenia gravis, restrictive dermopathy and others...
January 18, 2017: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/28331283/preoperative-subconjunctival-combined-injection-of-bevacizumab-and-mitomycin-c-before-the-surgical-excision-of-primary-pterygium-clinical-and-histological-results
#16
Alahmady Hamad Alsmman, Gamal Radwan, Mortada Ahmed Abozaid, Usama Ali Mohammed, Nesreen Gamal Abd Elhaleim
PURPOSE: The aim of this study was to detect the clinical and histological effects of preoperative subconjunctival injection of both bevacizumab and mitomycin C (MMC) 1 month before the surgical excision of primary pterygium using a bare sclera technique. PATIENTS AND METHODS: A total of 20 patients with primary pterygium underwent subconjunctival combined injection of 0.1 mL of MMC (0.1 mg/mL) and 0.1 mL of bevacizumab (1.25 mg/0.1 mL) 1 month before bare sclera excision of the pterygium...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28292385/effectiveness-of-preoperative-subconjunctival-injection-of-mitomycin-c-in-primary-pterygium-surgery
#17
Faisal Aziz Khan, Mohammed Awais, Shafaq Pervez Khan Niazi, Naveed Akhter, Mazhar Ishaq
OBJECTIVE: To compare the effectiveness of preoperative subconjunctival injection of Mitomycin-C at 24-hour and at one month before primary pterygium excision. STUDY DESIGN: Randomised controlled trial. PLACE AND DURATION OF STUDY: Eye Department, Combined Military Hospital, Sargodha, from January to December 2014. METHODOLOGY: Eyes of 60 patients were randomly allocated into two equal groups (A and B) of 30 each. In group A Mitomycin-C was injected into the pterygium one month before, and in group B Mitomycin-C was injected 24 hours before excision...
February 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28267910/-surgical-management-of-spinal-deformity-in-a-patient-with-escobar-syndrome-review-of-the-literature
#18
M C Hernández-Hernández, J A Canales-Nájera, J S De La Cruz-Álvarez, M E Tena-Zanabria, J Matus-Jiménez
BACKGROUND: The non-lethal variant of the Escobar or multiple pterygium syndrome is an entity of autosomal recessive inheritance linked to the X chromosome; it is characterized by multiple pterygia (hence its name) located mainly in the neck (95%) and armpits (55%), as well as other orthopedic malformations such as a vertical talus, congenital hip dislocation, and congenital scoliosis. OBJECTIVE: To present an optional surgical technique for the management of severe spinal deformities...
July 2016: Acta Ortopédica Mexicana
https://www.readbyqxmd.com/read/28261971/proteomics-a-new-perspective-for-the-understanding-of-pterygia
#19
Yifan Feng, Fei Yuan
Pterygia is a common ocular surface disease bothering both the patient because of its unsightly appearance and the surgeon because of its tendency to recur. The pathogenesis of pterygia is complex and the exact mechanism(s), especially at the molecular level, remains unknown. The use of modern proteomic techniques such as iTRAQ may yield new knowledge on the underlying pathogenesis of pterygia. In this issue of Proteomics Clinical Applications, Linghu et al. (article number 1600094) identified a total of 156 proteins that expressed differently between the pterygia and healthy conjunctiva using the isobaric tags for relative and absolute quantification based quantitative proteomic analysis...
July 2017: Proteomics. Clinical Applications
https://www.readbyqxmd.com/read/28105011/coincidence-of-inflamed-conjunctival-carcinoma-in-situ-and-primary-pterygium
#20
Hiroaki Endo, Satoru Kase, Yasuo Suzuki, Manabu Kase
BACKGROUND: We report a rare case of carcinoma in situ (CIS) in conjunction with a primary pterygium that exhibited characteristic angiographic and histopathological findings. CASE: A 78-year-old man presented with a pterygium and a whitish tumor adjacent to the pterygium in his right eye. Indocyanine green angiography displayed that feeder vessels within the primary pterygium spread to the whitish tumor. The tumor and pterygial tissues were surgically removed. Histologically, the resected tissue contained CIS as well as squamous metaplasia...
September 2016: Case Reports in Ophthalmology
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