A rare case of cystic hygroma in Neck and extending into thoracic cavity

Abstract Introduction Cystic hygroma is a benign swelling of the neck among the pediatric population. It is a fluid-filled sac resulting from blockage in the lymphatic system and is commonly located in the cervical region and axilla. Case presentation We present a rare case of a large cystic hygroma in the neck and the thorax in a 12 year’s old male. The lesion was diagnosed with the help of MRI which showed a cystic lesion extending from the carotid sheath to the mediastinum. And confirmed by fine-needle aspiration cytology (FNAC). The lesion was treated by surgical excision along with a cardiothoracic team. Discussion We will explore in our discussion the diagnostic modalities for such lesions and the different treatments available for Cystic Hygromas. Conclusion We concluded from this case that accurate diagnosis and careful planning with multidisciplinary team approach and choosing the right treatment as indicated has a great impact on the results for such difficult cases. "Written informed consent was obtained from the patient guardians for publication of this case report and accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal on request”.