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Thyroid carcinoma is the most common endocrine malignant diseases, accounting for 06% of all pediatrics cancer. Papillar y thyroid carcinoma which accounts f or approximately 90% of pediatric thyroid cancer. However, pediatric papillary thyroid carcinoma is still a rare disease. Due to lack of clinical trials, treatment options remain controversial. Pediatric thyroid cancers typically present as neck masses with no associated symptoms and thus come to medical attention at widely varying stages of disease progression. In contrast to adult papillary thyroid carcinoma, pediatric papillary thyroid carcinoma tends to be more aggressive at presentation with higher incidence of multifocality, lymph node metastases and extracapsular extension

Restoring an endodontically treated teeth may become problematic due to inadequate sound radicular structure. In such cases where apices are flared ,its even more challenging to debride the canal and control the obturating material within the canal. Regarding rehabilitating the radicular structure; cast post have been used since older times. But it resulted in catastrophic root fracture with reduced remaining dentinal thickness, shadowing and graying of root and discoloration at the tooth’s gingival margin. Hence This case report presents a clinical case where intraradicular rehabilitation is done using  MTA and light transimitting fibre post .

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