Bilateral Keratomalacia From Vitamin A Deficiency in Pancreatic Insufficiency.

While vitamin A deficiency is a leading cause of blindness globally, it is uncommon in the developed world. Here we describe the unique presentation of a young man in the United States with keratomalacia from vitamin A deficiency related to pancreatic insufficiency. The patient presented with bilateral blurry vision that persisted for two weeks, significant unintentional weight loss, orthostatic hypotension, and profuse diarrhea. Upon slit-lamp examination, bilateral corneal opacities were appreciated. After completing additional testing, it became clear that the patient's corneal opacities were related to vitamin A deficiency from pancreatic insufficiency.

Effect of spatial averaging on the amplitude ring ratio in multifocal electroretinography.

PURPOSE: The purpose of this study was to evaluate the effect of spatial averaging on the multifocal electroretinography (mfERG) amplitude ring ratios used in screening for hydroxychloroquine (HCQ) toxicity. METHODS: This was a retrospective review of the records of patients screened for HCQ retinopathy at the USF Eye Institute (University of South Florida) during the period of 2015-2020. Patients were tested binocularly with Diagnosys mfERG system (Diagnosys LLC, Lowell, MA). Only the records of patients referred internally were used. The effects of the lowest level (level 1, or 8%) of spatial averaging on the P1 amplitude ring ratios used for screening of HCQ maculopathy: R1/R2, R2/R5, R5/R3 and R5/R4, were evaluated. RESULTS: The records of 40 patients (4 males, 36 females) aged 54.4 ± 14.1 years were selected for analysis. The use of spatial averaging had a significant effect on P1 amplitudes, and on the ring ratios and this effect was correlated with the magnitude of the amplitudes and the ratios. Spatial averaging diminished P1 amplitude significantly in ring 1 (p < 0.0001) and increased it slightly in ring 4 (p < 0.05), while it had no effect on the amplitude of the other three rings. Although as a group spatial averaging had a moderate effect on the R1/R2 ratio (~ -15%), on an individual basis the range was wide, from -36 to 43%. The effect on the other ring ratios was similar: The average group effect was ~ -5%, ~ -3.4% and ~ -4% for R2/R5, R5/R3 and R5/R4 ratios, but individual effects ranged from 0.18% to -27.3%, 0.9% to -14.2% and 0.9% to -26.2%, respectively. CONCLUSIONS: For all ring ratios used in this analysis, spatial averaging has a substantial effect on the ring ratio, which could affect the interpretation of the results. Therefore, use of spatial averaging should be avoided when analyzing mfERG results for HCQ screening.

Outcomes in Deep Inferior Epigastric Perforator Flap and Implant-Based Reconstruction: Does Age Really Matter?

Despite the growing elderly population, there is limited research specific to this demographic concerning breast reconstruction (BR). Lack of evidence-based BR recommendations in older populations may contribute to misconceptions and subsequent underutilization of BR, especially autologous BR. Patients who received either deep inferior epigastric perforator (DIEP) flap BR or tissue expander/implant (TE/I) BR by a single surgeon between July 2011 and July 2015 were surveyed postoperatively by using the psychometrically validated BREAST-Q questionnaire to determine patient satisfaction. Patients were categorized into younger and older cohorts based on median age (55 years) and further stratified based on the type of reconstruction. Of the 311 patients surveyed, 95 patients responded (31% response rate). Overall, younger patients (<55 years old, n = 42) compared with older patients (≥55 years old, n = 53) had significantly higher satisfaction with their outcome (mean difference [MD] 12.06; 95% confidence interval [CI]: 0.96-23.15; P = 0.034). In the TE/I group (n = 58), younger patients had significantly higher satisfaction with breasts (MD: 14.17; 95% CI: 2.58-25.75; P = .017) and outcome (MD: 18.25; 95% CI: 3.95-32.5; P = .010) with fewer complications (odds ratio [OR]: 3.29; 95% CI: 1.37-7.86; P = .010). In the DIEP flap group (n = 55), there was no significant difference inr any of the satisfaction outcomes between younger and older patients. Younger patients tend to be more satisfied and demonstrate fewer complications with implant-based BR. In contrast, both younger and older patients undergoing abdominally based autologous BR were equally satisfied with comparable outcomes.

Unilateral Versus Bilateral Breast Reconstruction: Is Less Really More?

OBJECTIVE: Over the recent years, there has been an increase in prophylactic mastectomies with an associated increase in bilateral breast reconstruction. We aimed to compare outcomes in terms of patient satisfaction with unilateral versus bilateral breast reconstruction after deep inferior epigastric perforator (DIEP) flap and implant-based reconstruction. METHODS: Patients who underwent breast reconstruction by a single surgeon between July 2011 and July 2015 were surveyed using the independently validated BREAST-Q questionnaire. Mean satisfaction scores between patients undergoing unilateral versus bilateral breast reconstruction were compared and stratified based on the type of reconstruction [eg, DIEP flap, tissue expander to implant (TE/I)]. Groups were further categorized by age (patients <55 years and ≥55 years of age) and body mass index (<24.9 and >24.9). Complications were recorded. RESULTS: Of the 308 patients included, 118 (38%) had unilateral reconstruction (42 TE/I and 76 DIEP) and 190 (62%) had bilateral reconstruction (124 TE/I and 66 DIEP). A total of 95 patient surveys were included (31% response rate). Overall, patients receiving unilateral reconstruction demonstrated increased satisfaction with outcome (P = 0.028), psychosocial well-being (P = 0.043), and sexual well-being (P = 0.002). Complication rates were similar between unilateral and bilateral reconstruction. No significant differences for satisfaction were found in the TE/I group (N = 58; unilateral, 10; bilateral, 48).In the DIEP group (N = 37; unilateral, 20; bilateral, 17), those receiving unilateral reconstruction had higher satisfaction with outcome (P = 0.013) and sexual well-being (P = 0.014).Additionally, younger patients (<55 years) were more likely to undergo bilateral reconstruction (P = 0.018). Body mass index did not have a significant association with unilateral or bilateral reconstruction. CONCLUSIONS: Patients undergoing DIEP flap reconstruction showed higher satisfaction with unilateral reconstruction, whereas patients receiving TE/I reconstruction, either unilateral or bilateral, were equally satisified. Additionally, younger women were more likely to undergo bilateral reconstruction, which is consistent with current data trends. When considering surgical options, unilateral DIEP flap reconstruction may provide improved outcomes in terms of patient satisfaction when compared with bilateral reconstruction in select patients.

Tau depletion prevents progressive blood-brain barrier damage in a mouse model of tauopathy.

INTRODUCTION: The blood-brain barrier (BBB) is damaged in tauopathies, including progressive supranuclear palsy (PSP) and Alzheimer's disease (AD), which is thought to contribute to pathogenesis later in the disease course. In AD, BBB dysfunction has been associated with amyloid beta (Aß) pathology, but the role of tau in this process is not well characterized. Since increased BBB permeability is found in tauopathies without Aß pathology, like PSP, we suspected that tau accumulation alone could not only be sufficient, but even more important than Aß for BBB damage. RESULTS: Longitudinal evaluation of brain tissue from the tetracycline-regulatable rTg4510 tau transgenic mouse model showed progressive IgG, T cell and red blood cell infiltration. The Evans blue (EB) dye that is excluded from the brain when the BBB is intact also permeated the brains of rTg4510 mice following peripheral administration, indicative of a bonafide BBB defect, but this was only evident later in life. Thus, despite the marked brain atrophy and inflammation that occurs earlier in this model, BBB integrity is maintained. Interestingly, BBB dysfunction emerged at the same time that perivascular tau emerged around major hippocampal blood vessels. However, when tau expression was suppressed using doxycycline, BBB integrity was preserved, suggesting that the BBB can be stabilized in a tauopathic brain by reducing tau levels. CONCLUSIONS: For the first time, these data demonstrate that tau alone can initiate breakdown of the BBB, but the BBB is remarkably resilient, maintaining its integrity in the face of marked brain atrophy, neuroinflammation and toxic tau accumulation. Moreover, the BBB can recover integrity when tau levels are reduced. Thus, late stage interventions targeting tau may slow the vascular contributions to cognitive impairment and dementia that occur in tauopathies.