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BACKGROUND AND HYPOTHESIS: Zinc finger protein 804A (ZNF804A) was the first genome-wide associated susceptibility gene for schizophrenia (SCZ) and played an essential role in the pathophysiology of SCZ by influencing neurodevelopment regulation, neurite outgrowth, synaptic plasticity, and RNA translational control; however, the exact molecular mechanism remains unclear. STUDY DESIGN: A nervous-system-specific Zfp804a (ZNF804A murine gene) conditional knockout (cKO) mouse model was generated using clustered regularly interspaced short palindromic repeat/Cas9 technology and the Cre/loxP method. RESULTS: Multiple and complex SCZ-like behaviors, such as anxiety, depression, and impaired cognition, were observed in Zfp804a cKO mice. Molecular biological methods and targeted metabolomics assay validated that Zfp804a cKO mice displayed altered SATB2 (a cortical superficial neuron marker) expression in the cortex; aberrant NeuN, cleaved caspase 3, and DLG4 (markers of mature neurons, apoptosis, and postsynapse, respectively) expressions in the hippocampus and a loss of glutamate (Glu)/γ-aminobutyric acid (GABA) homeostasis with abnormal GAD67 (Gad1) expression in the hippocampus. Clozapine partly ameliorated some SCZ-like behaviors, reversed the disequilibrium of the Glu/GABA ratio, and recovered the expression of GAD67 in cKO mice. CONCLUSIONS: Zfp804a cKO mice reproducing SCZ-like pathological and behavioral phenotypes were successfully developed. A novel mechanism was determined in which Zfp804a caused Glu/GABA imbalance and reduced GAD67 expression, which was partly recovered by clozapine treatment. These findings underscore the role of altered gene expression in understanding the pathogenesis of SCZ and provide a reliable SCZ model for future therapeutic interventions and biomarker discovery.
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Background: The increasing popularity of the silicone sleeve penile implant has been accompanied by concerns over potential risks and adverse events. Objectives: To provide multi-institutional data on safety outcomes in patients undergoing silicone sleeve penile implant surgery across high-volume implant surgeons. In addition, we discuss preventative techniques to minimize postoperative complications and the management of these events. Design and methods: We performed a retrospective analysis of men undergoing penile silicone sleeve implants between November 2020 and November 2022 with four surgeons, each from a separate institution. Perioperative and postoperative adverse events, including unsatisfactory cosmetic outcomes requiring revision, were determined by physician follow-up. Flaccid penile length and girth were measured preoperatively and postoperatively. Results: A total of 299 male patients underwent silicone sleeve implant surgery, with an average age of 42.5 ± 10.5 years and an average body mass index of 28.5 ± 4.0. The patient cohort exhibited minimal comorbidities, with 5% having hyperlipidemia, 2% being smokers, 2% having cardiovascular disease, and 1% having diabetes. Patients experienced an average increase of 4.1 ± 1.5 cm in their flaccid penile length (a 50% increase) and an average increase of 3.4 ± 1.5 cm in their flaccid girth (a 37% increase) (p < 0.01). Complication rates included new-onset postoperative erectile dysfunction (0%), infection (1.3%), seroma (2.0%), and erosion (5.0%). The average follow-up time was 11.6 months. Notably, our rates of infection and seroma were lower than those reported in a previous single-center review, while erosion rates were higher. Conclusion: This is the largest study to characterize the safety of the penile silicone sleeve implant across multiple institutions. In men who desire cosmetic size augmentation, silicone sleeve implant surgery is associated with significantly increased flaccid penile length and girth. Complications are mainly cosmetic and may be corrected; however, patients should be appropriately counseled on the risk of erosion, which appears to be higher than previously reported.
Outcomes for penile silicone sleeve surgery This is the largest study to characterize the safety of the penile silicone sleeve implant across multiple institutions. In men who desire cosmetic penile size improvement, the silicone sleeve implant surgery is associated with significantly increased flaccid penile length and girth. Complications are mainly cosmetic and may be corrected, however, patients should be appropriately counseled on the risk of erosion, which appears to be higher than previously reported.
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Erectile dysfunction is a major postoperative complication following radical prostatectomy. Various treatments for post- radical prostatectomy erectile dysfunction including nonsurgical phosphodiesterase-5 inhibitors, intraurethral alprostadil, intracavernosal injections and penile implant prosthesis, often yield suboptimal results. In this prospective single-center case series, we examine the efficacy and outcomes of Himplant®, a subcutaneous silicone penile implant, placement in four patients with post-radical prostatectomy erectile dysfunction who experienced limited benefits with phosphodiesterase-5 inhibitors. Patient data including demographics, prostate cancer diagnoses, erectile dysfunction characteristics, previous treatments, and outcomes were collected. Himplant® placement was performed in a standardized manner through a high scrotal incision in all cases. Follow-up evaluations were conducted to assess the effectiveness of the procedure and any associated complications. Patients were contacted and asked 15 questions regarding satisfaction and erectile function with the responses recorded. This study presents findings of high patient satisfaction, increases in flaccid penile length and girth, no incidence of adverse events, and improved erectile function following Himplant® placement post-radical prostatectomy. Accordingly, we suggest Himplant® placement in patients who are frustrated by their penile appearance and suffering from erectile dysfunction after radical prostatectomy. Further multicenter studies are warranted to validate these findings and assess long-term outcomes and patient-reported satisfaction.
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Erectile dysfunction (ED) is a disorder that can cause distress and shame for men suffering from it. Men with ED will often turn to online support and chat groups to ask intimate questions about their health. ChatGPT is an artificial intelligence (AI)-based software that has been trained to engage in conversation with human input. We sought to assess the accuracy, readability, and reproducibility of ChatGPT's responses to frequently asked questions regarding the diagnosis, management, and care of patients with ED. Questions pertaining to ED were derived from clinic encounters with patients as well as online chat forums. These were entered into the free ChatGPT version 3.5 during the month of August 2023. Questions were asked on two separate days from unique accounts and computers to prevent the software from memorizing responses linked to a specific user. A total of 35 questions were asked. Outcomes measured were accuracy using grading from board certified urologists, readability with the Gunning Fog Index, and reproducibility by comparing responses between days. For epidemiology of disease, the percentage of responses that were graded as "comprehensive" or "correct but inadequate" was 100% across both days. There was fair reproducibility and median readability of 15.9 (IQR 2.5). For treatment and prevention, the percentage of responses that were graded as "comprehensive" or "correct but inadequate" was 78.9%. There was poor reproducibility of responses with a median readability of 14.5 (IQR 4.0). Risks of treatment and counseling both had 100% of questions graded as "comprehensive" or "correct but inadequate." The readability score for risks of treatment was median 13.9 (IQR 1.1) and for counseling median 13.8 (IQR 0.5), with good reproducibility for both question domains. ChatGPT provides accurate answers to common patient questions pertaining to ED, although its understanding of treatment options is incomplete and responses are at a reading level too advanced for the average patient.
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Multiple sclerosis (MS) is a complex autoimmune disease in which both the roles of genetic susceptibility and environmental/microbial factors have been investigated. More than 200 genetic susceptibility variants have been identified along with the dysbiosis of gut microbiota, both independently have been shown to be associated with MS. We hypothesize that MS patients harboring genetic susceptibility variants along with gut microbiome dysbiosis are at a greater risk of exhibiting the disease. We investigated the genetic risk score for MS in conjunction with gut microbiota in the same cohort of 117 relapsing remitting MS (RRMS) and 26 healthy controls. DNA samples were genotyped using Illumina's Infinium Immuno array-24 v2 chip followed by calculating genetic risk score and the microbiota was determined by sequencing the V4 hypervariable region of the 16S rRNA gene. We identified two clusters of MS patients, Cluster A and B, both having a higher genetic risk score than the control group. However, the MS cases in cluster B not only had a higher genetic risk score but also showed a distinct gut microbiome than that of cluster A. Interestingly, cluster A which included both healthy control and MS cases had similar gut microbiome composition. This could be due to (i) the non-active state of the disease in that group of MS patients at the time of fecal sample collection and/or (ii) the restoration of the gut microbiome post disease modifying therapy to treat the MS. Our study showed that there seems to be an association between genetic risk score and gut microbiome dysbiosis in triggering the disease in a small cohort of MS patients. The MS Cluster A who have a higher genetic risk score but microbiome profile similar to that of healthy controls could be due to the remitting phase of the disease or due to the effect of disease modifying therapies.
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Microbioma Gastrointestinal , Esclerosis Múltiple , Humanos , Microbioma Gastrointestinal/genética , Esclerosis Múltiple/genética , Disbiosis/genética , Predisposición Genética a la Enfermedad , ARN Ribosómico 16S/genética , Factores de RiesgoRESUMEN
OBJECTIVE: Since the advent of the Mulcahy technique of three-piece inflatable penile prosthesis (IPP) salvage, there have been multiple iterations of salvage prosthesis procedures reported in the literature. All of these techniques employ traditional antibiotic irrigation with or without rechanneling. We present our technique of salvage IPP using 0.05% chlorhexidine gluconate (Irrisept®) with corporal rechanneling for length preservation. MATERIALS AND METHODS: Our technique of IPP salvage begins with access via a 5 cm vertical midline scrotal incision. Dissection down to the corpora is performed with a combination of blunt dissection and dissection with fine tipped Metzenbaum scissors. Each component of the prior IPP is sequentially removed starting with the cylinders, followed by the pump, and finally the reservoir. Irrisept® is used to copiously irrigate out both cavernosal bodies as well as the scrotal compartment and prior reservoir location. A two minute dwell time of the Irrisept® is employed after mechanical irrigation. A penrose drain is placed from the space of Retzius through a separate stab incision in the scrotum. Corporotomies are closed, followed by Dartos fascia and scrotal skin. A complete change in gown and gloves of all members of the surgical team and a new set of drapes and instruments is performed. Through a separate subcoronal incision, two new corporotomies are made and separate channels created using nine inch Metzenbaum scissors. These channels are irrigated with Irrisept®. A 9 mm malleable penile prosthesis (MPP) is inserted and corporotomies and skin incision are closed. RESULTS: A total of four men with prior penoscrotal IPP placement underwent salvage IPP with MPP from January 2022 to October 2022. Median operative time was 165 minutes. Median preoperative cylinder size was 23.5 cm. Median postoperative malleable cylinder size was 23 cm. Median length of follow up was 4.8 months. There were no cases of MPP erosion or infection. Two patients elected to undergo repeat IPP insertion after 6 months with same cylinder size. CONCLUSION: IPP salvage with chlorhexidine irrigation and soak as well as separate corporal channeling in a noninfected field for MPP insertion is a viable strategy for infected prostheses given the ease of performance, low risk of repeat infection of the malleable device, and maintenance of corporal length of any subsequent prostheses.
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OBJECTIVE: To provide new data, techniques, and safety and efficacy outcomes in patients undergoing Penuma penile implant surgery at a large tertiary care center. METHODS: We performed a retrospective analysis of men undergoing Penuma implants between November 2020 and January 2022 with a single surgeon at a tertiary hospital. Measurements of penile length were made both pre- and postoperatively. Adverse events including infection and unsatisfactory cosmetic outcomes requiring revision were recorded. We also provide detailed technique descriptions of Penuma implantation and revision. Outcomes include measurements of incidents of peri and post-operative adverse events and penile length and girth pre- and post-operatively. RESULTS: 49 male patients underwent Penuma implant surgery. Mean age was 40.2 ± 8.9 years. Mean BMI was 28.2 ± 4.5. All but 2 patients were nonsmokers and only 2 had comorbidities (diabetes). Preoperative mean flaccid length was 8.1 ± 1.9 cm. Postoperative mean length was 12.3 ± 1.9 cm. Patients added an average of 4.9 ± 2.9 cm to their penile length, a 52% increase (P < .01). Average follow up time was 6 months. Among the complications were 1 case of infection and 2 cases of erosion. There were 4 cases of persistent flaring of the Penuma; 3 required revision surgery, all with a good cosmetic outcome. CONCLUSION: The Penuma implant can be used to safely enhance flaccid penile length and girth in patients with retractile penis or other cosmetic deformities. Should complications occur, they are mainly cosmetic and can be easily corrected with low risk.
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Implantación de Pene , Prótesis de Pene , Humanos , Masculino , Adulto , Persona de Mediana Edad , Prótesis de Pene/efectos adversos , Implantación de Pene/efectos adversos , Estudios Retrospectivos , Satisfacción del Paciente , Pene/cirugíaRESUMEN
Background: Glioblastoma (GBM) prognosis remains extremely poor despite standard treatment that includes temozolomide (TMZ) chemotherapy. To discover new GBM drug targets and biomarkers, genes signatures associated with survival and TMZ resistance in GBM patients treated with TMZ were identified. Methods: GBM cases in The Cancer Genome Atlas who received TMZ (n = 221) were stratified into subgroups that differed by median overall survival (mOS) using network-based stratification to cluster patients whose somatic mutations affected genes in similar modules of a gene interaction network. Gene signatures formed from differentially mutated genes in the subgroup with the longest mOS were used to confirm their association with survival and TMZ resistance in independent datasets. Somatic mutations in these genes also were assessed for an association with OS in an independent group of 37 GBM cases. Results: Among the four subgroups identified, subgroup four (n = 71 subjects) exhibited the longest mOS at 18.3 months (95% confidence interval: 16.2, 34.1; p = 0.0324). Subsets of the 86 genes that were differentially mutated in this subgroup formed 20-gene and 8-gene signatures that predicted OS in two independent datasets (Spearman's rho of 0.64 and 0.58 between actual and predicted OS; p < 0.001). Patients with mutations in five of the 86 genes had longer OS in a small, independent sample of 37 GBM cases, but this association did not reach statistical significance (p = 0.07). Thirty-one of the 86 genes formed signatures that distinguished TMZ-resistant GBM samples from controls in three independent datasets (area under the curve ≥ 0.75). The prognostic and TMZ-resistance signatures had eight genes in common (ANG, BACH1, CDKN2C, HMGA1, IFI16, PADI4, SDF4, and TP53INP1). The latter three genes have not been associated with GBM previously. Conclusion: PADI4, SDF4, and TP53INP1 are novel therapy and biomarker candidates for GBM. Further investigation of their oncologic functions may provide new insight into GBM treatment resistance mechanisms.
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Introduction: One of the most challenging aspects of inflatable penile prosthesis (IPP) surgery is reservoir placement. The traditional space of Retzius (SOR) is not suitable for all patients. For example, radical cystectomy or prostatectomy may alter the anatomical SOR. Hence, traditional placement of the reservoir in this space increases the risk of bowel or vascular injury. Also, patients with bilateral inguinal hernias repaired with mesh, or those with previous reservoirs that have been retained, are not eligible for a Retzius reservoir. Our study reports on the use of midline sub-rectus muscle placement of a penile prosthesis reservoir in these patients as an alternative to high submuscular placement commonly used. Methods: A retrospective chart review of male patients who underwent IPP surgery between June 2017 and 2021 was conducted. Patients were divided into two groups based on the location of the reservoir: SOR versus Midline Submuscular Reservoir (MSMR). Complication rates were compared, including herniated reservoirs, infections, bowel injuries, and vascular injuries. Results: Our cohort included 461 patients who underwent IPP surgery between June 2017 and 2021 in one tertiary center. SOR was used in 89% of patients and MSMR in 11% of patients (n = 413 and 48, respectively). Median follow-up for all patients was 28 months. The mean age was 67 ± 8 years. There was no statistically significant difference between the two groups regarding age or comorbidities (BMI, diabetes mellitus, hypertension, hyperlipidemia, and coronary artery disease). The complication rate was low in both the SOR and MSMR groups, with device malfunction being the most common (2% versus 4%, respectively; p = 0.32). The infection rate was 0.5% in the SOR group with no infections in the MSMR group (NS). There was only one case of herniation requiring surgical revision in the SOR group and no cases of bowel or vascular injury. Conclusion: Placement of a penile prosthesis reservoir within a midline rectus submuscular space is a safe and effective technique when the SOR is compromised by previous surgery or bilateral inguinal canals are not accessible.
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Peyronie's disease is often comorbid with erectile dysfunction and can cause significant penile shortening. We describe our modified tunica expansion procedure (TEP) technique of penile length preservation and girth enhancement with correction of penile angulation in patients with mild Peyronie's disease (<30 degree angulation, or hourglass deformity, no hinging) and erectile dysfunction presenting for inflatable penile prosthesis (IPP) surgery. A retrospective review of IPP placement from one high volume surgeon was performed. A total of 474 patients' charts from June 2017 to June 2021 were reviewed and those charts of patients undergoing modified TEP in the setting of Peyronie's disease were analyzed. Average increase in length and girth were measured and means with standard deviations calculated. The modified TEP is performed through a scrotal approach and involves complete eversion of the penis with dissection of Buck's fascia off the underlying tunica. Subsequently, staggered scorings of the underlying tunica are performed allowing for circumferential girth enhancement and length preservation. In men with Peyronie's disease, these scorings are preferentially concentrated on the side of the plaque to allow straightening without loss of length. A total of 32 patients with Peyronie's disease from the larger cohort underwent the modified TEP. Mean increase in length of distal corpora was 2.8 ± 0.8 cm (range 2.0-3.4 cm) (measured using Furlow before and after penile eversion with TEP), while mean increase in girth (measured at midphallus prior to prosthesis insertion and after IPP inflation) was 1.6 ± 0.4 cm (range 1.2-2.2 cm). There were no reported complications. A scrotal approach to TEP is an easy to perform technique that can be used to restore length and enhance girth in men with Peyronie's disease undergoing insertion of IPP. Additionally, it is a customizable approach that can also be used to correct mild penile angulation.
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Hypertension is a leading risk factor of cardiovascular disease and mortality in the population worldwide. Recently, hundreds of genomic loci were reported for hypertension by GWAS, however, the most SNPs are located in intergenic regions of genome, where a functional cause is difficult to determine. In the current study, a TWAS of hypertension was conducted using 452,264 individuals including 84,640 patients. KEGG and GO enrichment analyses were performed for the hypertension-related genes identified via TWAS. PPI network analysis based on the STRING database was also performed to detect TWAS-identified genes in hypertension. We have identified 18,420 genes from the GWAS summary data, and of those 1010 non-overlapping genes expression were significantly associated with hypertension after FDR correction (PFDR <0.05) in four tissues (left heart ventricle, aorta, whole blood, and peripheral blood). The KEGG and GO terms were mostly related to autoimmune mechanisms, and the autoimmune-related pathways have also been enriched using GO analysis for PPI genes. We further performed Mendelian randomization analysis, and the results supported a significant association between autoimmunity and hypertension. Moreover, 15 novel hypertension-susceptible genes were identified in all tissues, and five of the genes (RBM6, HLA-DRB5, UHRF1BP1, LYZ, and TMEM116) were associated with autoimmune system, which provide further evidence supporting an autoimmune mechanism in hypertension. In summary, our study supports that an autoimmune mechanism plays an important role in the development of hypertension, and these findings will provide new biological insights that will assist in deciphering the molecular etiology of hypertension.
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Purpose: Water vapor thermal therapy (WVTT, i.e., Rezum®) and prostatic urethral lift (PUL, i.e., Urolift®) are minimally invasive surgical therapy (MIST) options for benign prostatic hyperplasia (BPH). Few studies have directly compared the two procedures. We examined the clinical characteristics and postoperative outcomes of patients undergoing WVTT and PUL at our high-volume urban academic center. Methods: We reviewed our institutional MIST database to identify patients with prostate sizes ≥30 and ≤80 cc who underwent WVTT or PUL for treatment of BPH between January 2017 and September 2021. Pre- and postoperative outcomes, including retreatment rates, American Urological Association symptom score (AUA-SS), maximum flow (Qmax), postvoid residual (PVR), medication usage, trial of void success rates, catheterization requirements, and postoperative complications within 90 days were extracted and compared between procedures. Results: Three hundred seven patients received WVTT and 110 patients received PUL with average follow-up times of 11.3 and 12.8 months, respectively. WVTT patients showed significant improvements in AUA-SS, Qmax, and PVR, whereas PUL patients showed improvements in only AUA-SS and Qmax. Both WVTT and PUL patients with longitudinal follow-up demonstrated improvements in AUA-SS, Qmax, and PVR. Postoperatively, alpha-blocker utilization was significantly decreased following both WVTT and PUL (WVTT: 73.9%-46.6%, PUL: 76.4%-38.2%, both p < 0.001). Compared to patients receiving PUL, WVTT patients more frequently reported postoperative dysuria (22.8% vs 8.3%, p = 0.001) and nonclot-related retention (18.9% vs 7.3%, p = 0.005); PUL patients more frequently experienced postoperative clot retention (7.3% vs 2.6%, p = 0.027). There were no differences in rates of postoperative bladder spasm, trial of void success, urinary tract infections, or emergency department visits. Postoperative erectile dysfunction and retrograde ejaculation were rare and occurred at similar rates. Conclusion: In the real-world setting, WVTT and PUL have similar medium-term efficacy in improving symptoms and decreasing medication utilization for patients with BPH. Differences in postoperative complication profiles should inform patient counseling.
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Hiperplasia Prostática , Humanos , Masculino , Hiperplasia Prostática/cirugía , Próstata/cirugía , VaporRESUMEN
In agricultural settings, microbes and antimicrobial resistance genes (ARGs) have the potential to be transferred across diverse environments and ecosystems. The consequences of these microbial transfers are unclear and understudied. On dairy farms, the storage of cow manure in manure pits and subsequent application to field soil as a fertilizer may facilitate the spread of the mammalian gut microbiome and its associated ARGs to the environment. To determine the extent of both taxonomic and resistance similarity during these transitions, we collected fresh manure, manure from pits, and field soil across 15 different dairy farms for three consecutive seasons. We used a combination of shotgun metagenomic sequencing and functional metagenomics to quantitatively interrogate taxonomic and ARG compositional variation on farms. We found that as the microbiome transitions from fresh dairy cow manure to manure pits, microbial taxonomic compositions and resistance profiles experience distinct restructuring, including decreases in alpha diversity and shifts in specific ARG abundances that potentially correspond to fresh manure going from a gut-structured community to an environment-structured community. Further, we did not find evidence of shared microbial community or a transfer of ARGs between manure and field soil microbiomes. Our results suggest that fresh manure experiences a compositional change in manure pits during storage and that the storage of manure in manure pits does not result in a depletion of ARGs. We did not find evidence of taxonomic or ARG restructuring of soil microbiota with the application of manure to field soils, as soil communities remained resilient to manure-induced perturbation.IMPORTANCE The addition of dairy cow manure-stored in manure pits-to field soil has the potential to introduce not only organic nutrients but also mammalian microbial communities and antimicrobial resistance genes (ARGs) to soil communities. Using shotgun sequencing paired with functional metagenomics, we showed that microbial community composition changed between fresh manure and manure pit samples with a decrease in gut-associated pathobionts, while ARG abundance and diversity remained high. However, field soil communities were distinct from those in manure in both microbial taxonomic and ARG composition. These results broaden our understanding of the transfer of microbial communities in agricultural settings and suggest that field soil microbial communities are resilient against the deposition of ARGs or microbial communities from manure.
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Antibacterianos/farmacología , Estiércol/microbiología , Metagenómica , Microbiota/efectos de los fármacos , Microbiota/genética , Microbiología del Suelo , Agricultura , Animales , Bovinos , Industria Lechera , Farmacorresistencia Microbiana/genética , Granjas , Femenino , Genes Bacterianos , Metagenoma , Estaciones del AñoRESUMEN
Purpose: To assess the impact of two TYR hypomorphic alleles (R402Q and S192Y) on foveal pit and foveal avascular zone (FAZ) morphology. Design: Prospective, cross-sectional study. Participants: A total of 164 participants with normal vision (67 male and 97 female; mean ± standard deviation [SD] age = 30.5 ± 12.8 years) were recruited. Methods: Sequencing of more than 100 pigmentation-related genes was performed, and results were reviewed for the presence or absence of the TYR polymorphisms R402Q (rs1126809) and S192Y (rs1042602). Volumetric scans of the macula were obtained for each participant using OCT, and retinal thickness maps were analyzed using custom software. OCT angiography was used to image the FAZ, which was manually segmented and measured. Linear mixed model analysis was used to assess associations between genotype and foveal pit morphology. Main Outcome Measures: Foveal pit depth, diameter, volume, and FAZ area in relation to the presence of hypomorphic alleles R402Q and S192Y on the TYR gene. Results: Heterozygosity for the TYR R402Q allele was associated with decreased pit diameter (P = 0.0094) and decreased FAZ area (P = 0.025). Homozygosity for the TYR R402Q allele was associated with reduced pit volume (P = 0.0005), decreased pit depth (P = 0.007), reduced pit diameter (P = 0.0052), and reduced FAZ area (P = 0.0012). Homozygosity for TYR S192Y was associated with reduced FAZ area (P = 0.016). Heterozygosity for the TYR S192Y allele was not associated with differences in foveal pit depth, diameter, volume, or FAZ area (P > 0.05). Conclusions: Although the role of the TYR R402Q and S192Y hypomorphic alleles in albinism remains controversial, our data suggest that these variants contribute to the extensive inter-individual variability in foveal morphology in the normal population. Our results contribute to the evolving picture of the relationship between ocular pigmentation and foveal morphology.
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INTRODUCTION: The most common cause of patient dissatisfaction after penile prosthesis placement is penile shortening compared with one's memory of a natural erection. Surgical techniques as well as preoperative and postoperative protocols have been reported to preserve and possibly enhance penile length in someone undergoing penile prosthesis surgery. OBJECTIVES: This article presents a description of as well as the authors' experience with presurgical protocols, intraoperative techniques, and postsurgical protocols that allow for preservation or enhancement of penile length for patients who undergo inflatable penile prosthesis insertion. METHODS: An extensive, systematic literature review was performed using PubMed searching for key terms including penile lengthening, inflatablepenile prosthesis, penile girth, buried penis, and penile enhancement. All articles with subjective and/or objective penile length outcomes were reviewed. RESULTS: Several preoperative treatment protocols were found for penile length preservation and enhancement, which included use of a vacuum erection device as well as traction therapy. Intraoperative techniques included cavernosal sparing, channeling without dilatation, circumferential penile degloving, ventral phalloplasty, suprapubic lipectomy, liposuction, suspensory ligament release, sliding technique, modified sliding technique, multislice technique, and aggressive implant sizing. Postoperative protocols included early device inflation and cycling. Table 1 summarizes and compares the various preoperative, intraoperative, and postoperative strategies identified during literature review with their corresponding reported length gain. CONCLUSIONS: Many preoperative, intraoperative, and postoperative surgical techniques can be performed by high-volume implanters to improve one's perceived or true penile length. In the hands of experienced, high-volume implanters, these techniques can be very meaningful for patients undergoing penile prosthesis insertion, particularly those who are concerned with penile length. Shah B, Kent M, Valenzuela R. Advanced Penile Length Restoration Techniques to Optimize Penile Prosthesis Placement Outcomes. Sex Med Rev 2021;9:641-649.