title: Morbidity following central compartment reoperation for recurrent or persistent thyroid cancer.
abstract: OBJECTIVE
  To determine the incidence of recurrent laryngeal nerve injury and hypoparathyroidism, we reviewed our experience with central compartment reoperation.
  
  
  METHODS
  Patients underwent preoperative ultrasonography and magnetic resonance imaging of the neck. Ultrasound-guided fine-needle aspiration biopsy was performed and demonstrated evidence of tumor in 15 patients. At the time of surgery, hook wire electrodes were placed endoscopically into 1 or both vocal cords to monitor the integrity of the recurrent laryngeal nerve.
  
  
  METHODS
  The study population comprised 20 patients who had undergone reoperative central compartment dissections between the years 1997 and 2001. There were 15 women and 5 men whose mean age was 49.4 years. All of the patients had prior total or subtotal thyroidectomy, and 4 patients had prior neck dissections. A primary thyroid cancer recurrence in the thyroid bed was present in 7 patients, and the remainder of the patients had cytological evidence of paratracheal or mediastinal metastases. A single patient had evidence of distant metastases involving the lung.
  
  
  METHODS
  Short- and long-term postoperative morbidity.
  
  
  RESULTS
  Of the 20 patients, 18 had histologic evidence of metastases to the paratracheal lymph nodes, whereas 8 patients had metastases involving the anterior mediastinal lymph nodes. The mean number of lymph nodes removed was 6.5, and the mean number of positive lymph nodes was 4.7. None of the patients with normal preoperative laryngeal function had postoperative recurrent laryngeal nerve paresis or paralysis. There were 18 patients with normal preoperative parathyroid function. Four patients developed transient postoperative hypocalcemia. All 4 patients with transient postoperative hypocalcemia are currently eucalcemic. A single patient continues to receive calcium and calcitriol supplementation 1 month following her third central compartment dissection for recurrent thyroid cancer.
  
  
  CONCLUSIONS
  Reoperation for recurrent or persistent thyroid cancer presents a significant challenge. However, intraoperative recurrent laryngeal nerve monitoring and preservation of the vascular pedicle of the parathyroid glands has reduced the morbidity of reoperative central compartment dissections to acceptable levels. Revision surgery in the central compartment of the neck is compatible with successful eradication of recurrent thyroid cancers and acceptable morbidity.
authors.affiliation: Fair Grounds Medical Center, Allentown, PA, USA.
authors.forename: Michael K
authors.initials: MK
authors.lastname: Kim
authors.forename: Susan H
authors.initials: SH
authors.lastname: Mandel
authors.forename: Zubair
authors.initials: Z
authors.lastname: Baloch
authors.forename: Virginia A
authors.initials: VA
authors.lastname: Livolsi
authors.forename: Jill E
authors.initials: JE
authors.lastname: Langer
authors.forename: Liesje
authors.initials: L
authors.lastname: Didonato
authors.forename: Stephanie
authors.initials: S
authors.lastname: Fish
authors.forename: Randal S
authors.initials: RS
authors.lastname: Weber
mesh_terms: D000328:Adult; D000368:Aged; D018276:Carcinoma, Medullary / Q000473:pathology / Q000601:surgery*; D002291:Carcinoma, Papillary / Q000473:pathology / Q000601:surgery*; D005260:Female; D006801:Humans; D007011:Hypoparathyroidism / Q000209:etiology; D008297:Male; D008875:Middle Aged; D037981:Neck Dissection / Q000009:adverse effects*; D009364:Neoplasm Recurrence, Local / Q000473:pathology / Q000601:surgery*; D061226:Recurrent Laryngeal Nerve Injuries; D012086:Reoperation / Q000009:adverse effects; D012189:Retrospective Studies; D013964:Thyroid Neoplasms / Q000473:pathology / Q000601:surgery*; D013965:Thyroidectomy / Q000009:adverse effects*; D016896:Treatment Outcome