Volumetric modulated arc therapy and 3-dimensional printed bolus in the treatment of refractory primary cutaneous gamma delta lymphoma of the bilateral legs.

Patients with extensive dermal and subcutaneous disease present a technical challenge for treatment with radiation therapy (RT). Volumetric arc therapy (VMAT) can effectively treat disease on circumferential surfaces while minimizing dose to the core structures. However, treatment of extensive areas of the bilateral lower extremities with this technique has not been previously reported. Here we report the successful treatment of a patient with primary cutaneous gamma-delta T-cell lymphoma of the bilateral legs using VMAT and a custom 3-dimensional printed bolus. This approach is applicable for the treatment of cutaneous malignancies of the lower extremities.