Publications by authors named "Krishnamurthy Vikram"

Objective: Parathyroidectomy (PTX) is indicated in primary hyperparathyroidism (PHPT) with osteoporosis or nephrolithiasis. There is not a uniform consensus on the benefit of PTX for non-specific symptoms, but patient-reported questionnaires have demonstrated improved quality of life (QOL) afterwards. This study aimed to evaluate physical activity and sleep after PTX using smartwatch technology.

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Introduction: Despite advances in imaging modalities, a significant number of adrenal tumors are considered indeterminate and removed surgically. Currently, there is no intraoperative tool available to provide further information about the nature of indeterminate adrenal tumors. The aim of this study was to investigate whether near-infrared indocyanine green (ICG) imaging can be used in this regard.

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Background: Near-infrared autofluorescence imaging is an adjunct to parathyroid identification. As it does not show perfusion, it is important to study its impact during thyroidectomy by measuring quantifiable data on parathyroid detection rather than function. The aim of this study was to compare incidental parathyroidectomy rates in patients undergoing total thyroidectomy with or without near-infrared autofluorescence.

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Background: Indocyanine green (ICG) fluorescence is a new intraoperative imaging modality for adrenal tumors. Previous work suggested that pheochromocytomas did not show fluorescence, but experience is limited. The objective of this study is to analyze fluorescence imaging patterns of pheochromocytomas.

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Background: The usefulness of incorporating near-infrared autofluorescence into the surgical workflow of endocrine surgeons is unclear. Our aim was to develop a prospective registry and gather expert opinion on appropriate use of this technology.

Methods: This was a prospective multicenter collaborative study of patients undergoing thyroidectomy and parathyroidectomy at 7 academic centers.

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Background: Over the last 20 years, the prevalence of severe obesity (body mass index ≥ 35 kg/m) has almost doubled. This condition increases the challenge of laparoscopic adrenalectomy (LA) by creating problems with instrument reach, adequate exposure, and visualization. The aim was to compare perioperative outcomes of laparoscopic versus robotic adrenalectomy (RA) in severely obese patients.

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Background And Objectives: Pheochromocytoma is a challenging tumor type requiring resection with a clear margin and an intact capsule to prevent recurrences. Our aim was to compare perioperative outcomes of laparoscopic adrenalectomy (LA) versus robotic adrenalectomy (RA) for pheochromocytoma.

Methods: In an institutional review board-approved retrospective study, clinical parameters of patients who underwent LA versus RA at a single center were compared using Mann-Whitney U, χ , and survival analyses.

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Background: Patient-reported outcome measures for parathyroid and thyroid disease (PROMPT) is a 30-question, previously validated, survey assessing symptoms on a scale from 0 to 100. Using PROMPT, we aimed to assess symptom improvement for patients undergoing thyroidectomy and parathyroidectomy.

Methods: Single-center prospective study in which PROMPT was used to assess symptom improvement in patients undergoing parathyroidectomy or thyroidectomy.

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Background: The Afirma Genomic Sequencing Classifier uses whole transcriptome RNA sequencing to identify thyroid nodules as benign or suspicious. The Afirma Xpression Atlas became available in 2018 and reports findings across 593 genes, including 905 variants and 235 fusions. When an alteration is identified, its risk of malignancy and associated neoplasm type is listed.

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Background: A single center experience with sporadic pancreatic insulinoma was analyzed to develop an algorithm for modern surgical management.

Methods: Thirty-four patients undergoing surgery from 2001 to 2019 were reviewed.

Results: The majority underwent enucleation (10 laparoscopic, 15 open).

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Objective: Calcium and parathyroid hormone (PTH) values are believed to have a linear relationship in patients with primary hyperparathyroidism and correlate with parathyroid gland size, with higher values predicting single-gland disease. In this modern series, these preoperative values were correlated with operative findings to determine their utility in predicting the gland involvement at parathyroid exploration.

Methods: Two thousand consecutive patients who underwent initial surgery for sporadic primary hyperparathyroidism from 2000 to 2014 were reviewed.

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Background: Fine needle aspiration (FNA) biopsy is an essential procedure for thyroid nodules. Although, the efficacy of surgeon-performed thyroid FNA biopsies has been demonstrated in the literature, there are insufficient data regarding how to establish an efficient program with a low insufficiency rate within a group practice.

Methods: An endocrine surgery thyroid FNA biopsy program was established in 2000 by one surgeon, with training of additional partners during fellowship and upon recruitment.

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Background: Incorporation of quality improvement (QI) training is essential to meet the milestones set forth by the Accreditation Council for Graduate Medical Education. However, there is no standardized curriculum.

Objective: We aimed to create a QI curriculum through the integration of didactics and team-based learning via the completion of resident-led QI projects.

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Background: Intraoperative near-infrared imaging (NIFI) of parathyroid glands (PG) by first-generation technology had limited image quality and depth penetration. Second-generation NIFI has recently been introduced. Our aim was to compare (1) capability to detect PG and (2) image quality between older and newer technologies.

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Background: Preoperative localization studies are essential for parathyroid re-exploration. When noninvasive studies do not regionalize the abnormal parathyroid gland, selective parathyroid venous sampling may be employed. We studied the utility of parathyroid venous sampling in reoperative parathyroid surgery and the factors that may affect parathyroid venous sampling results.

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Social networks shape perceptions by exposing people to the actions and opinions of their peers. However, the perceived popularity of a trait or an opinion may be very different from its actual popularity. We attribute this perception bias to friendship paradox and identify conditions under which it appears.

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Background: Under recognition of primary hyperparathyroidism can lead to delays in diagnosis and surgical management. We aimed to establish a time course for primary hyperparathyroidism from initial hypercalcemia to surgery and evaluate the impact of guidelines for surgical referral on this time course.

Methods: A retrospective review was conducted on all patients undergoing parathyroidectomy for primary hyperparathyroidism in 2013 at the Cleveland Clinic.

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Introduction: Current guidelines increasingly suggest the use of thyroid lobectomy for indeterminate (Bethesda 3 and 4) and high-risk (Bethesda 5 and 6) thyroid nodules; however, the clinical reality is often very different.

Materials And Methods: The aim of this study was to determine the rate of completion thyroidectomy (CTx) for indeterminate and high-risk thyroid nodules which are pre-operatively classified as suitable for unilateral resection (lobe eligible) based on current guidelines. Seven hundred consecutive patients with thyroid nodules and FNA cytology over four years (2015-2018) were reviewed.

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Background: The aim of this study was to determine both the accuracy of near infrared fluorescence imaging to detect parathyroid glands and the potential indications of near infrared fluorescence imaging in thyroid and parathyroid surgery by correlating the autofluorescence signature with the pathologic specimen.

Methods: This was an institutional review board-approved, prospective study of patients undergoing thyroidectomy and parathyroidectomy with near infrared fluorescence imaging. Each specimen sent to pathology was inspected with near infrared fluorescence imaging and predicted to be either parathyroid or non-parathyroid tissue by its autofluorescence signature and then correlated with the pathologic findings.

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Introduction: Although frequently used as an adjunct to cytology in patients with differentiated thyroid cancers, interpretation of thyroglobulin washout remains unclear. We aim to compare the utility of different analytic tools to develop recommendations for use in post-total thyroidectomy follow-up.

Methods: This is an institutional review board-approved retrospective study of patients who underwent lymph node fine needle aspiration biopsy with thyroglobulin washout between 2012 and 2018, during the post-total thyroidectomy follow-up of differentiated thyroid cancer.

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Background: Patient-reported outcome measures are being used increasingly to assess disease severity and response to surgery. The purpose of this study was to create and validate a patient-reported outcome measure for symptoms of thyroid enlargement and hyperparathyroidism, 2 conditions where the presence of preoperative symptoms and response to surgery is often questioned.

Methods: A questionnaire reviewing common symptoms was developed from a literature review and expert opinion.

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Objective: With increasing recognition of more subtle presentations of primary hyperparathyroidism (pHPT), laboratory values are frequently seen in a range that would be expected for patients who have familial hypercalcemic hypocalciuria (FHH). Calcium creatinine clearance ratio (CCCR) has been advocated as a diagnostic tool to differentiate between these two disorders. However, it is limited by an indeterminate range (0.

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Background: Although the concept of surgeon-performed fine needle aspiration of thyroid nodules is established, experience with surgeon-performed lymph node fine needle aspiration is scant. We aimed to study the efficacy of surgeon-performed lymph node fine needle aspiration in patients with thyroid pathologic conditions.

Methods: This is an institutional review board-approved study of patients with thyroid pathologic conditions who underwent surgeon-performed lymph node fine needle aspiration between 2002 and 2017.

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Background: Primary aldosteronism causes hypertension and hypokalemia and is often surgically treatable. Diagnosis includes elevated plasma aldosterone, suppressed plasma renin activity, and elevated aldosterone renin ratio. Adrenalectomy improves hypertension and hypokalemia.

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