Manrique, Oscar J.

Abstract Background Lymphedema is an accumulation of protein-rich fluid in the interstitial spaces resulting from impairment in the lymphatic circulation that can impair quality of life and cause considerable morbidity. Lower extremity lymphedema (LEL) has an overall incidence rate of 20%. Conservative therapies are the first step in treatment of LEL; however, they do not provide a cure because they fail to address the underlying physiologic dysfunction of the lymphatic system. Among several surgical alternatives, lymphaticovenous anastomosis (LVA) has gained popularity due to its improved outcomes and less invasive approach. This study aims to review the published literature on LVA for LEL treatment and to analyze the surgical outcomes. Methods PubMed database was used to perform a comprehensive literature review of all articles describing LVA for treatment of LEL from Novemeber 1985 to June 2019. Search terms included “lymphovenous” OR “lymphaticovenous” AND “bypass” OR “anastomosis” OR “shunt” AND “lower extremity lymphedema.” Results A total of 95 articles were identified in the initial query, out of which 58 individual articles were deemed eligible. The studies included in this review describe notable variations in surgical techniques, number of anastomoses, and supplementary interventions. All, except one study, reported positive outcomes based on limb circumference and volume changes or subjective clinical improvement. The largest reduction rate in limb circumference and volume was 63.8%. Conclusion LVA demonstrated a considerable reduction in limb volume and improvement in subjective findings of lymphedema in the majority of patients. The maintained effectiveness of this treatment modality in long-term follow-up suggests great efficacy of LVA in LEL treatment.

Background: Histoplasmosis of the upper extremities is extremely rare, and there is no consensus in its management. The aim of this study was to present a case report and literature review of histoplasmosis in the upper extremities to provide the best treatment recommendation and to increase awareness of this disease. Methods: A systematic review of the literature was performed in PubMed, MEDLINE, and EMBASE databases with the search terms “(Tenosynovitis AND histoplasmosis)” OR “(Upper limbs AND histoplasmosis)” OR “(Upper extremities AND histoplasmosis)” OR “((finger OR arm OR hand OR forearm OR wrist) AND histoplasmosis).” Manuscripts were included in the study if they described diagnosis of histoplasmosis in the bone, joint, synovia, or tendons of the upper extremities. Results: In all, 14 manuscripts and 15 cases of histoplasmosis of the upper extremities from 1992 to 2015 met the inclusion criteria. Eight (53.3%) patients were diagnosed with tenosynovitis, 5 (33.3%) with osteomyelitis, 1 (6.7%) with carpal tunnel syndrome, and 1 (6.7%) with joint wrist abscess. Immunosuppression, travel history, previous diagnosis with histoplasmosis, and persistent symptoms may suggest infectious causes. Surgery and medical treatment together are recommended to optimize outcomes compared with single treatment alone. Conclusions: Histoplasmosis of the upper extremities may have various clinical presentations, including tenosynovitis, osteomyelitis, carpal tunnel syndrome, and joint wrist abscess. The type of surgical approach may depend on the etiology of disease. Increased awareness and knowledge of the clinical signs, symptoms, and effective treatment modalities will help decrease possible complications, such as tendon rupture and functional impairment of the upper extremities.

Abstract Background The deep inferior epigastric perforator (DIEP) flap is the most common perforator flap for microsurgical breast reconstruction. Contrary to the conventional open approach, robotic-assisted DIEP flap harvest intends to preserve ARS integrity, thereby reducing the morbidity. We assessed the feasibility and compared performance outcomes of a robotic, cadaveric training model for DIEP flap harvest using two approaches: transabdominal preperitoneal (TAPP) and totally extraperitoneal (TEP). Methods A robotics system (da Vinci Xi) was applied in conjunction with a cadaveric training model. Ports were placed in the abdominal wall to triangulate each DIEP flap. Surgical time and technical characteristics were recorded. Values were analyzed and compared. Results Eight female cadavers (16 hemi-DIEP flaps) were dissected: 50% TAPP and 50% TEP approaches. Mean harvest time was 56 minutes (range: 48–74 minutes) and 65 minutes (range: 60–83 minutes) for TAPP versus TEP groups, respectively (p < 0.05). Mean pedicle dissection time was 36 minutes (range: 25–40 minutes) and 39 minutes (range: 30–42 minutes) for TAPP versus TEP groups, respectively (p > 0.05). Intra-abdominal contents were manipulated twice on average in the TAPP group versus 0 times in the TEP group (p < 0.05). One TAPP case had an injury to the bowel, and one TEP case was converted to conventional open due to pneumoperitoneum. Conclusion Robotic-assisted DIEP flap harvest represents a technological enhancement for advanced regenerative plastic surgery. Our model demonstrated both TAPP and TEP are feasible, with TEP less invasive, preserving the posterior rectus sheath, and decreasing complication risks. However, there is a steeper and longer learning curve for TEP.

Background: Prepectoral implant-based breast reconstruction has gained popularity because of advantages over the subpectoral technique. Acellular dermal matrix use with implant-based breast reconstruction has become common because of its perceived superior aesthetic outcome. Matrices are expensive, however, and recent evidence has pointed to several potential complications. This article reports a series of prepectoral implant-based breast reconstructions with and without acellular dermal matrix and compared their outcomes. Methods: This is a single-surgeon retrospective review of patients who underwent staged prepectoral implant-based breast reconstruction following nipple-sparing mastectomy over two periods. Patients with well-perfused mastectomy skin flaps with a homogeneous thickness underwent reconstruction with acellular dermal matrix initially. On evolution of the practice, it was not used. Patient demographics, operative data, and complications were analyzed. Aesthetic outcome was measured by the BREAST-Q survey and the Aesthetic Item Scale. A cost analysis was also performed. Results: Forty patients were included (acellular dermal matrix group, n = 19; non–acellular dermal matrix group, n = 21). The nonmatrix group had one case (5 percent) of seroma and one case (5 percent) with hematoma; there were none in the acellular dermal matrix group. Average BREAST-Q and Aesthetic Item Scale scores were 82.3 versus 81.6 (p = 0.954) and 20.98 versus 20.43 (p = 0.640) for the matrix and nonmatrix groups, respectively. The direct cost savings for the authors’ institution over 1 year if matrix was not used in all cases of implant-based breast reconstruction would be estimated at $3,105,960 to $6,211,920 for unilateral and bilateral cases, respectively, for Medicare reimbursement. Conclusions: With adequate patient selection, acellular dermal matrix is not always required during two-stage prepectoral implant-based breast reconstruction for good aesthetic outcomes. The economic burden on patients and the health care system could be lessened with selective matrix use. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, III.

Background: Prepectoral implant-based reconstruction reemerged as a viable approach following recent advances in reconstructive techniques and technology. To achieve successful outcomes, careful patient selection is critical. Obesity increases the risk of complications and has been suggested as a relative contraindication for prepectoral breast reconstruction. Methods: Retrospective chart review of patients who underwent immediate two-stage implant-based reconstruction at the authors’ institution was performed. Only women having a body mass index of 30 kg/m2 or greater were included. Patient demographics, operative details, and surgical outcomes of prepectoral and subpectoral reconstruction were compared. Results: One hundred ten patients (189 breasts) who underwent prepectoral and 83 (147 breasts) who underwent subpectoral reconstruction were included. Complications were comparable between the two groups. Twelve devices (6.4 percent), including implants and tissue expanders, required explantation in the prepectoral group, and 12 devices (8.2 percent) required explantation in the subpectoral group (p =0.522). Final implant-based reconstruction was achieved in 180 breasts (95.2 percent) in the prepectoral group and 141 breasts (95.9 percent) in the subpectoral group. Regardless of type of reconstruction (prepectoral or subpectoral), for each point increase in body mass index, the odds of complications and device explantation increased by 3.4 percent and 8.6 percent, respectively; and the optimal cutoff to predict higher complications and explantation rates was a body mass index of 34.8 kg/m2 and 34.1 kg/m2, respectively. Conclusions: Obesity increases complications and failure rates in a positive correlation; however, complications and final reconstruction rates are comparable between the prepectoral and subpectoral groups. The authors believe that obesity should not be a contraindication for prepectoral breast reconstruction but that care should be taken in patients with a body mass index above 35 kg/m2. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, III.

Lymphedema is a condition in which protein-rich fluid accumulates in the tissue causing impaired limb function from swelling and stiffness. Understanding the mechanical properties of soft tissue in lymphedematous limbs is important in clinical diagnosis. We recently developed an ultrasound surface wave elastography (USWE) technique for measuring the shear wave speed of tissue. The aim of this study is to evaluate lymphedematous limb use USWE. A total of 11 patients with lymphedema were included. Both normal and affected extremities were measured. A 0.1-s harmonic vibration was generated by the indenter of the handheld shaker on the limb. Ultrasound probe was used for detecting the tissue motion. Shear wave speed of the tissue was measured using 2-D processing window technique. A region of interest was selected to measure superficial and deep fat tissues. The obtained results showed that the magnitudes of the wave speeds of both the superficial and deep fat tissue at lymphedema sites were statistically higher than those of the control sites, respectively. This suggests that USWE may be useful in assessing correlation between tissue stiffness and lymphedema and would enable physicians to monitor disease severity.

Background Implant-based breast reconstruction (IBR) accounts for 70% of postmastectomy reconstructions in the United States. Improving the quality of surgical care in IBR patients through accurate measurements of outcomes is necessary. The purpose of this study is to compare the American College of Surgeons National Surgical Quality Improvement Program (NSQIP) data from our institution to our complete institutional health records database. Methods Data were collected and recorded for all patients undergoing IBR at our institution from 2015 to 2017. The data were completely identified and compared with our institutional NSQIP database for demographics and complications. Results The electronic health records data search identified 768 IBR patients in 3 years and NSQIP reported on 229 (30%) patients. Demographics were reported similarly among the 2 databases. Rates of tissue expander/implant infections (5.9% vs 1.8%; P = 0.003) and wound dehiscence (3.5% vs 0.4%; P = 0.003) were not reported similarly between our database and NSQIP. However, the rates of hematoma (2.7% vs 1.8%) and skin flap necrosis (2.5% vs 1.8%) were comparable between the two databases. In our database, 43% of all complications presented after 30 days of surgery, beyond NSQIP's capture period. Conclusions Databases built on partial sampling, such as the NSQIP, may be useful for demographic analyses, but fall short of providing data for complications after IBR, such as infections and wound dehiscence. These results highlight the utility and importance of complete databases. National comparisons of clinical outcomes for IBR should be interpreted with caution when using partial databases.