The aim is to conduct a single centre retrospective study of all patients with stage IV melanoma that underwent surgery for metastases at Sahlgrenska University Hospital between 2010-01-01 and 2018-12-31. Pre- and postoperative data will be collected from digital medical records, the Swedish Cancer Registry, the Swedish Cause of Death Register as well as from the national Swedish cancer patient database (INCA). If needed, patient records will be collected from other hospitals. Results will be presented in written format as a summary and analysis of the characteristics of the cases operated on during the inclusion period.

The aim is to identify predictive and prognostic factors for outcome and complications in the surgical treatment of stage IV metastatic melanoma.

Inclusion Criteria:

• Biopsy verified stage IV malignant melanoma, stage M1c.
• Having undergone surgery with metastasectomy of melanoma tumors.

Exclusion Criteria:

• retroperitoneal tumors

Patients with abdominally metastasized malignant melanoma stage IV.

Data to be made available upon request.