Complete response to talimogene laherparepvec in a primary acral lentiginous melanoma.

Talimogene laherparepvec (T-VEC) is an oncolytic virus, approved for the treatment of stage IIIb-IVM1a melanoma with injectable disease (cutaneous, subcutaneous or lymphatic). It is a modified herpes simplex virus type 1 that induces tumor-specific T-cell responses via reduction of virally mediated suppression of antigen presentation, stimulation of viral pathogenicity and enhancement of tumor-selective replication. Response rates up to 82.