Navigating the Cervico-Axillary Canal: A Rare Encounter With Double Dumbbell Space Sarcoma Involving the Neck and Axilla.

Space sarcomas are exceedingly rare neoplasms, and double dumbbell space sarcoma in the cervicoaxillary canal has not been previously reported. We present a case of a 63-year-old male who presented with a swelling in the neck and axilla of four years' duration, which rapidly increased in size over the last three months. Clinical examination and imaging revealed a multiseptate mass extending from the posterior triangle of the neck to the right axilla and chest wall through the cervicoaxillary canal. This lesion encased major vessels and components of the brachial plexus but did not infiltrate them. A trucut biopsy confirmed the diagnosis of well-differentiated liposarcoma. Surgical intervention was performed, achieving complete resection with preservation of neurovascular structures. This case highlights the unique challenges and complexities associated with managing double dumbbell space sarcomas in the cervicoaxillary canal. Additionally, it underscores the importance of a multidisciplinary approach to achieving successful outcomes while preserving limb function and minimizing complications. Long-term follow-up is essential for monitoring potential recurrences.