Sheila Sheth

University of Arkansas at Little Rock, Little Rock, Arkansas, United States

Are you Sheila Sheth?

Claim your profile

Publications (4)8.88 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Cervical lymph node metastases from differentiated thyroid cancer (DTC) are common. Thirty to eighty percent of patients with papillary thyroid cancer harbor lymph node metastases, with the central neck being the most common compartment involved. The goals of this study were to: (1) identify appropriate methods for determining metastatic DTC in the lateral neck and (2) address the extent of lymph node dissection for the lateral neck necessary to control nodal disease balanced against known risks of surgery. A literature review followed by formulation of a consensus statement was performed. Four proposals regarding management of the lateral neck are made for consideration by organizations developing management guidelines for patients with thyroid nodules and DTC including the next iteration of management guidelines developed by the American Thyroid Association (ATA). Metastases to lateral neck nodes must be considered in the evaluation of the newly diagnosed thyroid cancer patient and for surveillance of the previously treated DTC patient. Lateral neck lymph nodes are a significant consideration in the surgical management of patients with DTC. When current guidelines formulated by the ATA and by other international medical societies are followed, initial evaluation of the DTC patient with ultrasound (or other modalities when indicated) will help to identify lateral neck lymph nodes of concern. These findings should be addressed using fine-needle aspiration biopsy. A comprehensive neck dissection of at least nodal levels IIa, III, IV, and Vb should be performed when indicated to optimize disease control.
    Thyroid: official journal of the American Thyroid Association 03/2012; 22(5):501-8. · 2.60 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Sestamibi scintigraphy and neck ultrasonography have both been proposed as screening modalities for the detection of abnormal parathyroid glands in patients with primary hyperparathyroidism. As a result, many surgeons use both techniques prior to surgery. The goal of this study was to independently evaluate both ultrasound and sestamibi as single-modality preoperative screening tools for primary hyperparathyroidism. A retrospective review of consecutive patients who underwent surgery for primary hyperparathyroidism from January 1999 to December 2009. Imaging results were compared to surgical findings. 440 patients were found to meet inclusion criteria. Sensitivities for correct localization of a single parathyroid adenoma for sestamibi versus ultrasound were: 83% (95% CI 78-86) versus 72% (95% CI 67-76). Ultrasound operator had no influence on sensitivity, and ultrasound identified nodular thyroid disease in 31% of patients. Ultrasonography alone can be used as the primary screening modality in patients with primary hyperparathyroidism. Ultrasound sensitivity is conserved despite operator variability, and identifies concomitant thyroid pathology.
    ORL 03/2011; 73(2):116-20. · 1.10 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: The purpose of the present study was to determine the utility of routine dissection of level II-B and level V-A in patients with papillary thyroid cancer (PTC) undergoing lateral neck dissection for ultrasound-guided fine-needle aspiration (FNA)-confirmed lateral nodal metastasis in at least one neck nodal level. In a retrospective review, we studied the charts of 53 consecutive patients (February 2002-December 2007) with PTC who had undergone therapeutic lateral neck dissection that included at least level II-(A and B) and/or level V-(A and B). The levels were designated as such in situ prior to surgical pathology specimen processing. Reports of the preoperative FNA cytopathologic findings, the extent of lateral neck dissection by levels, and the postoperative final histopathologic examination were reviewed. A total of 53 patients underwent therapeutic lateral neck dissection for FNA-confirmed nodal metastasis of PTC at a minimum of one lateral neck level. All 53 patients had preoperative ultrasonography and FNA confirmation of lateral neck disease: 46 patients had PTC, 5 had the tall cell variant of PTC, and 2 had the follicular variant of PTC on final surgical pathology. Ten patients underwent neck dissection at the time of thyroidectomy, and 43 patients underwent neck dissection for lateral neck recurrence/persistence of PTC following a previous thyroidectomy and radioactive iodine +/- previous neck dissection. A total of 46 patients underwent unilateral neck dissection and 7 patients underwent bilateral neck dissection; thus 60 neck dissection specimens were evaluated. Level II (A and B) was excised in 59/60 neck dissections, with 33 of 59 specimens (33/59 = 60%) positive for metastasis. Level II-B was positive 5 times (5/59; 8.5-95% CI: 2.4, 20.4), and each time level II-B was positive, level II-A was also grossly (and histopathologically--seen at the time of surgery) positive for metastasis. Level III was excised 58 times and was positive in 38 specimens (38/58 = 66%). Level IV was excised 58 times and was positive in 29 specimens (29/58 = 50%). Level V (A and B) was excised 40 times and was positive in 16 specimens (16-40 = 40%). Level V-A did not account for any of the positive level V results (0%). Cervical lateral neck metastases in PTC occur in a predictable pattern, with levels III, II-A, and IV most commonly involved. Patients with PTC who undergo lateral neck dissection for FNA-confirmed nodal metastases might harbor disease in level II-B, especially if level II-A is involved. We recommend elective dissection of level II-B only when level II-A is involved, based on FNA confirmation, or when it is grossly involved on intraoperative evaluation. Routine dissection of level V-B is recommended in this patient population, while elective dissection of level V-A is not necessary.
    World Journal of Surgery 07/2009; 33(8):1680-3. · 2.35 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Background The aim of this study was to review our experience with reoperative thyroid bed surgery (RTBS) for recurrent/persistent papillary thyroid cancer (PTC), and present an algorithm for safe and effective RTBS.Methods This is a retrospective study. Records of 33 consecutive patients who underwent RTBS for recurrent/persistent PTC in a previously operated thyroid bed, and were operated upon by the senior author (R.P.T.) July 2001 to January 2006 were reviewed. Reports of the pre- and post-RTBS serum thyroglobulin (TG) levels, the high-resolution thyroid bed ultrasound examination, pre-RTBS FNA cytopathology, as well as the post-RTBS final histopathology were reviewed. Recurrent laryngeal nerve (RLN) monitoring was used for all patients. Reports of the intra-RTBS condition of the RLN and any reported surgical complications were reviewed. In addition, reports of the pre- and post-RTBS fiberoptic laryngoscopy as well as pre- and post-RTBS serum calcium levels were reviewed.ResultsIn our study, 33 consecutive patients underwent RTBS for recurrent/persistent PTC with or without lateral neck dissection. In 30 patients, recurrent/persistent PTC was suspected because of rising serum TG levels, interpreted in conjunction with serum anti-TG-antibody titers by the endocrinology service at our institution. Three patients had serum anti-TG antibodies and their disease was detected and FNA confirmed by a regularly scheduled surveillance ultrasound examination. All patients underwent pre-RTBS high-resolution thyroid bed ultrasound examination and FNA for all suspicious masses. All patients had FNA-confirmed PTC in the thyroid bed. All patients had detailed diagrams localizing areas of FNA-confirmed PTC in the thyroid bed provided to the surgeon. In all study patients, post-RTBS histopathologic findings confirmed sites of recurrent/persistent PTC determined by pre-RTBS US guided FNA. All RLNs (53/53) that were at risk were successfully identified. In 3 patients, the RLN was electively resected because of the envelopment by a large paratracheal mass or tumor densely adherent to the RLN insertion point at the cricothyroid region. There was no incidence of unexpected RLN injury, permanent hypocalcemia, or any other surgery-related complication. Post-RTBS serum TG levels were significantly decreased or undetectable in most patients (2 patients had concurrent lung metastases), when compared with pre-RTBS levels. No patient exhibited thyroid bed recurrent/persistent PTC in the post-RTBS period based on semiannual high resolution neck ultrasound examination with a median follow-up of 2 years.Conclusions Safe and effective RTBS is based on a multidisciplinary approach that enables the identification and localization of recurrent/persistent PTC. The surgical algorithm for RTBS described, provides a pathway that all endocrine-head and neck surgeons can comfortably utilize to treat this complex and challenging patient population. © 2007 Wiley Periodicals, Inc. Head Neck 2007
    Head & Neck 11/2007; 29(12):1069 - 1074. · 2.83 Impact Factor

Publication Stats

96 Citations
8.88 Total Impact Points

Institutions

  • 2012
    • University of Arkansas at Little Rock
      Little Rock, Arkansas, United States
  • 2011
    • Tulane University
      • School of Public Health and Tropical Medicine
      New Orleans, LA, United States
  • 2007–2009
    • Johns Hopkins Medicine
      • Department of Otolaryngology - Head and Neck Surgery
      Baltimore, MD, United States