Sudden Spontaneous Neck Swelling Due to Thyroid Malignancy: A Case Report.

Sudden spontaneous swelling in the neck is an emergency condition required to be addressed immediately. It poses a diagnostic dilemma. It is extremely rare for a thyroid malignancy to present as a sudden onset neck swelling in a euthyroid young male with no obvious trauma to the neck. This is a rare case report of a follicular variant of papillary carcinoma thyroid presenting as sudden neck swelling to the extent of shifting trachea to other side in a young euthyroid male.