Publications by authors named "Westekemper H"

Article Synopsis
  • * Out of 42 treated eyes, 31 were addressed for radiogenic cataracts, showing a significant visual improvement in 61.3%, while risks included metastasis and secondary malignancies in some cases.
  • * Overall, cataract surgery proved safe and effective, but vitreoretinal surgeries had limited visual gains and higher risks, emphasizing the need for careful patient selection and risk analysis before surgery.
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Purpose: To evaluate the standard of care, in particular the use of topical or subconjunctival interferon-2b, in treating ocular surface squamous neoplasia or melanocytic tumours in tertiary eye centres in Germany.

Methods: A survey containing 14 questions was sent to 43 tertiary eye centres in Germany. The questions addressed the surgical and medical management of ocular surface squamous neoplasia and melanocytic tumours (primary acquired melanosis and malignant melanoma), as well as the clinical experiences and difficulties in prescribing off-label interferon-2b eye drops and subconjunctival injections.

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Article Synopsis
  • - OSSN is a type of eye cancer that can come back if only treated by cutting it out, so using a special therapy called brachytherapy after surgery helps prevent it from returning.
  • - In a study, 9 patients with OSSN had brachytherapy together with other treatments, and they were checked for issues over a few years.
  • - The results showed that none of the patients had their cancer come back, and they kept their eye function, although a couple had minor problems from the treatment.
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Objective: To evaluate the midterm results of tumour resection with or without adjunctive therapy for ocular surface squamous neoplasia of the fornix, including conjunctival reconstruction with buccal mucosa and amniotic membrane.

Methods: A retrospective case-series analysis including slit-lamp examination, photographic documentation, and biopsy results (repeated when clinical findings changed). Analysis centred on eye function, complications, additional procedures, and recurrence rate.

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We assessed the long-term outcomes and treatment-related adverse effects of patients with Stage I, "orbital-type" lymphomas that were uniformly treated with photons. All consecutive patients diagnosed with low-grade, Ann Arbor Stage IEA orbital lymphoma treated between 1999 and 2020 at our department were retrospectively reviewed. We excluded patients with exclusive conjunctival involvement, typically treated with en face electrons.

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Background: Conjunctival melanoma is a rare type of ocular melanoma, which is prone to local recurrence and metastasis and can lead to patient death. Novel therapeutic strategies have revolutionized cutaneous melanoma management. The efficacy of these therapies in conjunctival melanoma, however, has not been evaluated in larger patient cohorts.

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Purpose: To evaluate the outcome of phacoemulsification in patients with chronic ocular Graft-versus-host disease (oGVHD) after allogeneic hematopoietic stem cell transplantation (aHSCT).

Methods: Retrospective, observational multicenter study from 1507 oGVHD patients. From the patient files, data were collected including best-corrected visual acuity (BCVA), intraocular pressure (IOP), Schirmer's test I, tear film break-up time (TFBUT), corneal fluorescein staining score, postoperative complications, and pre- and post-operative topical therapy.

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Despite the increased risk of subsequent primary tumors (SPTs) external beam radiation (EBRT) may be the only therapeutic option to preserve a retinoblastoma eye. Due to their physical properties, proton beam therapy (PBT) offers the possibility to use the effectiveness of EBRT in tumor treatment and to decisively reduce the treatment-related morbidity. We report our experiences of PBT as rescue therapy in a retrospectively studied cohort of 15 advanced retinoblastoma eyes as final option for eye-preserving therapy.

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Purpose: This study aims to analyse disease-free survival, overall survival and risk factors after orbital exenteration in patients with conjunctival and uveal melanoma.

Methods: Patients who underwent orbital exenteration due to conjunctival and uveal melanoma were included in this retrospective study (March 2000 to March 2018).

Results: A total of 76 patients were enrolled in this study: 60 patients had a conjunctival melanoma and 16 had a uveal melanoma.

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The aim of this paper is to give an overview of different benign and malignant epibulbar tumors. Categories can be made of the age of manifestation (paediatric tumors versus tumors of adults), the originating cell types (squamous cell tumors, melanocytic tumors, lymphomas or germ cell tumors) or genesis (proliferative, infectious or degenerating tumors). Most epibulbar tumors show lesions on the conjunctiva or the cornea.

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Article Synopsis
  • This article reviews diagnostic and treatment options for common malignant tumors affecting the eye, including basal cell carcinoma, conjunctival lymphoma, squamous cell carcinoma, and conjunctival melanoma.
  • Key diagnostic steps include a detailed patient history, slit lamp exam, and photo documentation, with regular follow-ups needed to monitor for potential recurrences.
  • Treatment strategies vary by tumor type, including surgical excision for basal cell carcinoma, irradiation for lymphoma, and specialized therapies like mitomycin C or brachytherapy for squamous cell carcinoma and conjunctival melanoma.
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Background: The management of conjunctival melanoma is challenging and frequently ends in exenteration. The aim of this retrospective study was to evaluate the long-term results of proton beam radiation with regard to various clinical parameters.

Methods: Eighty-nine patients with extended conjunctival melanoma (≥T2) and multifocal bulbar located tumors (T1c/d) were treated consecutively with proton radiotherapy (dose 45 Gy).

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Background: Conjunctival melanoma is a potentially deadly eye tumour. Despite effective local therapies, tumour recurrence and metastasis remain frequent. The genetics of conjunctival melanomas remain incompletely understood.

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Background: In cases of rare cancer entities, such as malignant melanoma of the conjunctiva, there are often no evidence-based national guidelines available. Standard operating procedures (SOP) are an alternative in these cases.

Objective: The aim of this project was to develop a consensus SOP for diagnosis, treatment, and follow-up care of conjunctival melanomas between the 14 Centers of Excellence in Germany supported by German Cancer Aid.

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Article Synopsis
  • The article reviews diagnostic and treatment options for common epibulbar malignant tumors, including basal cell carcinoma, conjunctival lymphoma, squamous cell carcinoma, and conjunctival melanoma, emphasizing the need for detailed patient history and follow-up.
  • Basal cell carcinoma, the most common periocular skin tumor, is treated through total excision, while lymphomas are treated primarily with percutaneous irradiation.
  • Squamous cell carcinoma requires excision, but larger tumors may need additional treatments like mitomycin C, brachytherapy, or proton therapy, whereas conjunctival melanoma, although rare, necessitates excision and further therapies due to its aggressive nature.
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Purpose: The most common malignant intraocular tumors with a high mortality in adults are uveal melanomas. Uveal melanomas arise most frequently in the choroid or ciliary body (97%) and rarely in the iris (3%). Whereas conjunctival and posterior uveal (ciliary body and choroidal) melanomas have been studied in more detail genetically, little data exist regarding iris melanomas.

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Background: Ocular graft-versus-host disease (GvHD) following allogeneic blood stem cell transplantation leads to immunologically induced alterations in many ocular tissues, particularly at the ocular surface. Within the framework of the main topic, this article focuses primarily on corneal complications in chronic ocular GvHD.

Objective: This article aims to promote understanding of the influencing factors, diagnostics, and therapeutic options pertaining to corneal complications in ocular GvHD.

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Article Synopsis
  • Amniotic membrane transplantation (AMT) is used to treat acute ocular chemical burns by promoting healing and reducing inflammation.
  • A study analyzed outcomes of 72 eyes from 54 patients treated with AMT over a 10-year period, demonstrating that 40.3% achieved good visual acuity post-treatment.
  • While AMT shows promise in enhancing recovery and restoring eye surface integrity, patients with severe burns and limbal stem cell deficiency may still face long-term vision challenges.
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The majority of human tumours can be easily and correctly diagnosed based on clinical information and pathological assessment. In some cases however, correct diagnosis can prove difficult. In such cases, molecular approaches can be of significant diagnostic value.

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Background: Radiotherapy of conjunctival melanoma has gained in importance in recent years compared to less invasive therapeutic approaches. This is due to the high recurrence rates achieved by omitting adjuvant therapy and to the increasing availability of suitable radiotherapeutic methods, so that tumors formerly not amenable to organ-preserving therapy can now be treated.

Objective: This article presents the current radiotherapeutic options for conjunctival melanoma.

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Purpose: Ocular surface squamous neoplasia, including intraepithelial neoplasia (CIN) and invasive squamous cell carcinoma (SCC), are one of the most common malignant tumors of the conjunctiva. Little is known of the genetic alterations involved in their pathogenesis. Promoter mutations in telomerase reverse transcriptase (TERT) have been identified in various cancers, including many associated with ultraviolet (UV) exposure.

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Objectives: Recently, recurrent mutations in regulatory DNA regions, such as promoter mutations in the TERT gene were identified in melanoma. Subsequently, Weinhold et al. reported SDHD promoter mutations occurring in 10% of melanomas and being associated with a lower overall survival rate.

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Background: Ocular GvHD is a severe complication following allogenic blood stem cell transplantation leading to massive reduction in quality of life and ocular pathologies including corneal perforation. Interdisciplinary patient-centred care needs to be performed in specialized ophthalmic centers that provide all diagnostic and therapeutic options, however, only few clinics have the necessary infrastructure. In addition there is a lack of transparency and easily accessible information for the patients regarding ophthalmic care and specialized centres.

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