Author = Mehran Frouzanian

Diabetes-Associated Dry Eye Syndrome: Clinical Features, Underlying Molecular Mechanisms and Treatment Options

Pages 1-6

https://doi.org/10.22034/thr.2024.212234

Amirsaleh Abdollahi, Mehran Frouzanian

Abstract The global diabetes epidemic continues to rise, with complications extending beyond diabetic retinopathy (DR) and cataracts to include dry eye syndrome (DES), or keratoconjunctivitis sicca. Approximately 54% of individuals with diabetes experience DES, yet the condition remains poorly understood. Diabetes mellitus (DM) disrupts tear film homeostasis through mechanisms such as lacrimal gland dysfunction, Meibomian gland dysfunction, and abnormal tear dynamics. Chronic hyperglycemia, diabetic neuropathy, systemic inflammation, and altered mucin secretion exacerbate these changes, leading to tear instability and ocular surface damage. Risk factors for DES include advanced age, female sex, smoking, and higher glycated hemoglobin (HbA1c) levels. Surgical interventions for diabetes-related ocular complications, such as cataract surgery, intravitreal injections, and pan-retinal photocoagulation, further increase the risk of DES. Treatment strategies for diabetic dry eye (DMDES) include artificial tears, anti-inflammatory drugs like corticosteroids, cyclosporin A, tacrolimus, and autologous blood serum. However, these treatments address symptoms rather than underlying causes, with potential side effects. Emerging therapies, including gene-based approaches, show promise but require further research. Given the high prevalence of DMDES and its potential impact on quality of life, routine ocular surface and tear function assessments are recommended in diabetic care. Early diagnosis, glycemic control, and personalized treatment regimens are critical for preventing complications. Future studies must focus on targeted therapies to better manage DMDES and improve patient outcomes.
 

The Role of Varicocelectomy in Enhancing Fertility Outcomes: A Review Article

Pages 1-6

https://doi.org/10.22034/thr.2024.212236

Ahmad Deylami, Mehran Frouzanian, Mehdi Younesi Rostami, Behkam Rezaiemehr, Amirsaleh Abdollahi, Mohadeseh Modanlu, Maryam Shahbazinia, AmirReza Ranjbar, Fatemeh Rajabian

Abstract Varicocele is the leading cause of male infertility and can often be corrected or improved through a range of surgical and radiological methods. Consequently, it appears logical that varicocele should be treated in infertile men who have this condition. Varicocele, an enlargement of the pampiniform plexus veins affecting 15–20% of men, is more common in those with infertility concerns. Its impact on spermatogenesis is linked to oxidative stress, hypoxia, and immune responses, which may be alleviated by varicocelectomy. Varicocelectomy has been associated with improvements in sexual function, hormonal profiles, and fertility, particularly in men with hypogonadism. This review evaluates its effects on testosterone levels, semen quality, and fertility outcomes, highlighting the advantages of microsurgical varicocelectomy, such as improved sperm quality, higher spontaneous pregnancy rates, and fewer complications. However, patient outcomes depend on surgical indications, pre-existing conditions, and individual expectations.  Emerging evidence suggests that repairing varicoceles before assisted reproductive technology (ART) can enhance fertility outcomes. Further studies are needed to refine treatment criteria and expand options for diverse patient groups, including adolescents and men with pain-related varicoceles. The review also emphasizes the need for standardized diagnostic and treatment protocols.

Pain Management and Anesthesia Considerations in Thyroid Carcinoma: An Emphasis on Anaplastic, Papillary, Follicular, Hurthle Cell, and Medullary Subtypes

Pages 1-7

https://doi.org/10.22034/thr.2024.212239

Amin Ghanbarpour Juybari, Amirsaleh Abdollahi, Alireza Karimi Varaki, Ali Pahnabi, Mehran Frouzanian, Mohamad Javad Bay, Mohammad Modarresi

Abstract Thyroid carcinoma encompasses a heterogeneous group of malignancies, each with distinct biological behaviors, therapeutic strategies, and challenges in pain management and anesthesia. This review delves into the subtypes of thyroid carcinoma—anaplastic, papillary, follicular, Hurthle cell, and medullary—emphasizing the critical interplay between effective pain control and surgical outcomes. Anaplastic thyroid carcinoma (ATC), characterized by rapid progression and local invasion, necessitates multimodal pain management, including systemic analgesics and nerve blocks, to address severe discomfort caused by structural compression. Papillary and follicular thyroid carcinomas, generally indolent but prone to recurrence, require tailored anesthesia and postoperative pain protocols, incorporating techniques like cervical plexus blocks to reduce opioid reliance. Unique challenges are posed by Hurthle cell carcinoma (HCC) and medullary thyroid carcinoma (MTC). HCC, often associated with poor prognosis, demands precise surgical techniques to enhance survival, while MTC involves hereditary and sporadic forms with systemic manifestations complicating pain management. Advanced surgical methods, including transoral and robotic thyroidectomy, are explored for their efficacy in reducing complications and enhancing patient satisfaction. For patients with genetic predispositions, early prophylactic surgeries significantly mitigate risks. Anesthesia considerations are paramount, particularly in advanced ATC, where airway management is crucial. Techniques such as total intravenous anesthesia (TIVA) and regional nerve blocks optimize perioperative outcomes while minimizing systemic side effects. This narrative underscores the importance of interdisciplinary collaboration and individualized care in addressing the multifaceted needs of thyroid carcinoma patients, ultimately aiming to improve survival rates and quality of life.

Unraveling the Spectrum of Thyroid Carcinoma: From Aggressive Anaplastic to Curable Differentiated Forms - A Comprehensive Narrative Review

Pages 1-9

https://doi.org/10.22034/thr.2025.213077

Rostam Poormousa, Mehran Frouzanian, Amirsaleh Abdollahi, Mohamad Javad Bay, Kasra Hasannejad, Reza Talaei

Abstract Thyroid carcinoma encompasses a spectrum of malignancies with distinct clinical characteristics, management strategies, and prognoses. This narrative review article provides an in-depth examination of anaplastic thyroid carcinoma (ATC), papillary thyroid carcinoma (PTC), Hurthle cell carcinoma (HCC), and medullary thyroid carcinoma (MTC), offering insights into their epidemiology, diagnostic and treatment modalities. Anaplastic thyroid carcinoma is a highly aggressive and undifferentiated form of thyroid cancer, often associated with poor prognosis. Treatment strategies include combined resection and radiotherapy, but late-stage cases exhibit limited therapeutic options, emphasizing the need for novel therapeutic approaches. Papillary thyroid carcinoma, the most common thyroid cancer, generally carries a favorable prognosis. The article discusses surgical interventions like total thyroidectomy and lobectomy, along with minimally invasive techniques such as transoral endoscopic thyroidectomy vestibular approach (TOETVA) and robotic thyroidectomy. The importance of considering health-related quality of life in the treatment decision-making process is highlighted. Hurthle cell carcinoma, a rare and aggressive subtype, is explored with a focus on factors influencing prognosis. Surgical management, including thyroid lobectomy, completion thyroidectomy, and iodine-131 therapy, is discussed in detail. Medullary thyroid carcinoma is categorized into hereditary and sporadic forms, each requiring specific approaches. The review emphasizes the significance of genetic testing for patients at risk of multiple endocrine neoplasia syndrome (MEN2) and the need for early thyroidectomy in genetic RET mutation carriers. Furthermore, the article evaluates the extent of surgery, the role of radioiodine therapy, and the significance of follow-up in treating differentiated thyroid carcinomas (DTC). Surgical approaches for follicular thyroid carcinoma (FTC) and factors influencing the decision for total thyroidectomy versus lobectomy are elaborated upon. In summary, this narrative review provides a comprehensive overview of thyroid carcinoma subtypes, their epidemiology, surgical interventions, and postoperative management, offering valuable insights for clinicians and researchers in the field.