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Endocrinol Nutr ; 62(10): 493-8, 2015 Dec.
Article in English, Spanish | MEDLINE | ID: mdl-26459118

ABSTRACT

OBJECTIVES: To assess the incidence of 131I-induced sialadenitis (SD) in patients with differentiated thyroid cancer (DTC), to analyze clinical and other factors related to metabolic radiotherapy that may predict the lack of response to conventional medical therapy (CMT), and to determine the effectiveness of intraductal steroid instillation in patients failing CMT. MATERIAL AND METHODS: Fifty-two patients with DTC, 45 females (86.5%) and 7 males (13.5%) with a mean age of 44.21±13.3 years (r=17-74) who received ablation therapy with 131I after total thyroidectomy. Patients with diseases and/or medication causing xerostomia were excluded. Patients underwent salivary gland scintigraphy with 99Tc (10mCi). RESULTS: Eighteen patients (34.62%) had SD and received antibiotics, antispasmodics, and oral steroids for 15 days. They were divided into two groups: responders to medical therapy (n=12, age 44.3±14.4 years, 2 men [17%], 10 women [83%], cumulative dose 225±167.1 mCi) and non-responders to medical treatment, who underwent steroid instillation into the Stensen's duct (n=6 [33%], 2 men [33%], 4 women [67%], age 50±13.8 years, cumulative dose 138.3±61.7 mCi). Scintigraphy showed damage to the parotid and submaxillary glands. CONCLUSION: Incidence of 131I-induced sialadenitis was similar to that reported by other authors. Age, mean cumulative dose of 131I, and involvement of parotid and submaxillary glands did not condition response to CMT; however, male sex was a conditioning factor. Symptom persistence for more than 15 days makes instillation into the Stensen's duct advisable. This is an effective and safe method to avoid surgical excision of salivary glands.


Subject(s)
Adrenal Cortex Hormones/therapeutic use , Anti-Bacterial Agents/therapeutic use , Iodine Radioisotopes/adverse effects , Parasympatholytics/therapeutic use , Radiotherapy, Adjuvant/adverse effects , Sialadenitis/drug therapy , Adolescent , Adrenal Cortex Hormones/administration & dosage , Adult , Aged , Combined Modality Therapy , Drug Therapy, Combination , Female , Humans , Instillation, Drug , Iodine Radioisotopes/therapeutic use , Male , Middle Aged , Parotid Gland/pathology , Parotid Gland/radiation effects , Salivary Ducts , Sialadenitis/diagnostic imaging , Sialadenitis/epidemiology , Sialadenitis/prevention & control , Submandibular Gland/pathology , Submandibular Gland/radiation effects , Thyroid Neoplasms/radiotherapy , Thyroid Neoplasms/surgery , Thyroidectomy , Young Adult
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