Publications by authors named "Daniel Kwan"

Background: Predictors for permanent nipple-areola complex (NAC) insensitivity after reduction mammoplasty are sparsely defined.

Objectives: We analyze factors associated with NAC insensitivity over a long-term follow-up.

Methods: A retrospective analysis of reduction mammoplasties on 1598 breasts performed by four surgeons from March 2015-February 2023 was conducted.

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Purpose: The Area Deprivation Index (ADI) is a validated quantifiable measure of neighborhood disadvantage and social determinants of health (SDoH). Higher percentiles in ADI correlate with the most disadvantaged neighborhoods: lower income, lower education, and less access to transportation. Using ADI, we aimed to investigate the impact of SDoH on bilateral breast reduction (BBR) complication rates.

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Although research and innovation is a key within the field of plastic and reconstructive surgery, the impact of team structure, interpersonal dynamics, and/or standardized infrastructure on scholarly output has been infrequently studied. In this work, we present the formation and implementation of a novel plastic surgery research program that aims to unite previously disparate clinical and translational research efforts at our institution to facilitate critical inquiry. From July 2022 to June 2023, our department launched a pilot research program based on three pillars: (1) formalization of a research curriculum (monthly research meetings for agenda setting and discussion for project honing, formal research leadership for meeting facilitation and workflow regulation), (2) development of a centralized database to compile ongoing research (Google Drive repository to house all ongoing research documents, facilitate real-time editing, and provide resources/templates for assisting in the research process), and (3) bolstering of a core research identity built on mentorship and collaboration (more frequent interactions to shift previously siloed faculty-student mentorship into a robust milieu of intercollaboration).

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Background: Accurate diagnosis of periprosthetic infections following breast reconstructions is paramount to reduce morbidity. Alpha defensin-1 (AD-1) is an antimicrobial peptide released by neutrophils. This study evaluates the relationship between quantitative AD-1 levels and infection severity in patients with suspected periprosthetic infection.

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Article Synopsis
  • The study investigates whether spinal wound closures done by plastic surgeons (PS) result in fewer postoperative complications compared to those done by spine surgeons (SS), given that complication rates for spinal surgeries can reach up to 26%.
  • A systematic review of 10 studies, including 4 that directly compared PS and SS closures, revealed no significant differences in postoperative outcomes between the two groups.
  • The research suggests that PS often handle cases with a higher risk of complications, and their involvement may help normalize the risk of wound issues, but the overall quality of evidence available is considered low.
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Tears of the gluteus medius and minimus are an important cause of recalcitrant greater trochanteric pain syndrome. Although endoscopic and open abductor repairs have demonstrated promising outcomes, the success of these techniques is dependent on the size of the tear and the quality of the tissue. In patients presenting with abductor insufficiency and evidence of previous repair failure, large retracted tears, muscle atrophy and/or fatty infiltration, reconstruction/augmentation techniques should be considered.

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Background:  With greater acceptance of postmastectomy breast reconstruction (PMBR) as a safe and reliable treatment option, the role of plastic surgeons in breast cancer management continues to rise. As Medicare reimbursements for surgical procedures decline, hospitals may increase charges. Excessive markups can negatively affect uninsured and underinsured patients.

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Background:  Within the last 20-years, Medicare reimbursements for microsurgery have been declining, while physician expenses continue to increase. As a result, hospitals may increase charges to offset revenue losses, which may impose a financial barrier to care. This study aimed to characterize the billing trends in microsurgery and their implications on patient care.

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Purpose: Autologous breast reconstruction remains a versatile option to produce a natural appearing breast after mastectomy. The deep inferior epigastric perforator remains the most commonly used flap choice, but when this donor site is unsuitable or unavailable, the transverse upper gracilis (TUG) or profunda artery perforator (PAP) flaps are popular secondary alternatives. We conduct a meta-analysis to better understand patient outcomes and adverse events in secondary flap selection in breast reconstruction.

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Background: Gender-affirming mastectomy is a common surgery for the treatment of gender incongruence and gender dysphoria and improves quality of life. Hematoma rates for gender-affirming double incision mastectomies are between 2.8% and 8.

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Background: Within the United States, access to gender-affirming operations covered by health insurance has increased dramatically over the past decade. However, the perpetually changing landscape and inconsistencies of individual state health policies governing private and public insurance coverage present a lack of clarity for reconstructive surgeons and other physicians attempting to provide gender-affirming care. This work systematically reviewed the current U.

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Background: Prompt diagnosis of breast implant infection is critical to reducing morbidity. A high incidence of false-negative microbial culture mandates superior testing modalities. Alpha defensin-1 (AD-1), an infection biomarker, has outperformed culture in diagnosing periprosthetic joint infection with sensitivity/specificity of 97%.

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Article Synopsis
  • A 45-year-old male presented with ureteral obstruction due to an inguinal hernia that entrapped his ureter and was complicated by an ectopic pelvic kidney and an undescended testis.
  • Initial imaging showed severe hydronephrosis linked to the hernia and a pelvic right kidney, prompting the placement of a nephrostomy tube to alleviate the condition.
  • The report discusses the unusual nature of ureteral herniation in conjunction with cryptorchidism and emphasizes the complications that arose from this rare medical scenario.
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Online crowdfunding allows transgender patients to fundraise for their surgeries or hormonal therapy. In this study, we updated the geographic trends in fundraising for gender-affirming surgery and sought to establish the factors influencing the amount raised per campaign. Campaigns were identified from GoFundMe.

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Background: Ganglioneuromas are a benign tumor originating from neural crest cells. As one of the neuroblastic tumors, ganglioneuromas are most common in children, with a mean age at presentation of 7 years. Ganglioneuromas are typically singular in nature, but rarely can present with lymph node involvement and distant metastasis.

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Botulinum neurotoxins (BoNTs) are notorious toxins and powerful agents and can be lethal, causing botulism, but they are also widely used as therapeutics, particularly to treat neuromuscular disorders. As of today, the commercial BoNT treatments available are from native A or B serotypes. Serotype F has shown efficacy in a clinical trial but has scarcely been used, most likely due to its medium duration of effect.

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Background/objectives: To examine the association between various carbohydrate quality indicators and nutrient adequacy in Australian adults.

Subjects/methods: Dietary data from adult participants of the 2011-2012 Australian Health Survey (weighted n = 6150) who had completed two 24 h recalls were analyzed. Glycaemic indices (GI) of foods were estimated based on a published method.

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Unlabelled: Prompt, accurate diagnosis of breast implant infection is critical to minimizing patient morbidity. Bacterial culture false negative rate approaches 25%-30%, and better costeffective testing modalities are needed. Alpha defensin-1 (AD-1) is a neutrophil-mediated biomarker for microbial infection.

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Context: Medroxyprogesterone acetate (MPA) is a widely used progestin in feminizing hormone therapy. However, the side effects and hormonal changes elicited by this drug have never been investigated in the transgender population.

Objective: We evaluated the incidence of self-reported effects among transwomen using MPA and this drug's impact on hormonal and metabolic parameters.

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Background: Maxillomandibular fixation (MMF) is an important tool in the treatment of facial fractures and bone-anchored arch bar systems have emerged as treatment options. This study illustrates our experience with the Synthes MatrixWAVE MMF system and the novel application in closed treatment of patients with multiple concurrent mandibular fractures.

Methods: We enrolled eight patients with concurrent mandibular fractures and treated them with the MatrixWAVE MMF system.

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Background: Gender affirmation surgery is an important treatment for patient with gender dysphoria. It consists of a series of complex procedures, and well-informed patients have been shown to have better outcomes. However, there are no published data regarding the readability of currently available online patient recourses for gender affirmation surgery.

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The increasing prevalence of influenza viruses with resistance to approved antivirals highlights the need for new anti-influenza therapeutics. Here we describe the functional properties of hexamethylene amiloride (HMA)-derived compounds that inhibit the wild-type and adamantane-resistant forms of the influenza A M2 ion channel. For example, 6-(azepan-1-yl)-N-carbamimidoylnicotinamide ( 9: ) inhibits amantadine-sensitive M2 currents with 3- to 6-fold greater potency than amantadine or HMA (IC50 = 0.

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Introduction: The use of personal mobile devices in the medical field has grown quickly, and a large proportion of physicians use their mobile devices as an immediate resource for clinical decision-making, prescription information and other medical information. The iTunes App Store (Apple, Inc.) contains approximately 20,000 apps in its "Medical" category, providing a robust repository of resources for clinicians; however, this represents only 2% of the entire App Store.

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In this article, we outline the important role the surgeon plays in the management of chronic wounds. Debridement and washout are required for grossly infected wounds and necrotizing soft tissue infections. Cutaneous cancers such as squamous cell carcinomas may contribute to chronic wounds and vice versa; if diagnosed, these should be treated with wide local excision.

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