A case of metastatic breast carcinoma to the skin expressing SARS-CoV-2 spike protein possibly derived from mRNA vaccine

Journal of Dermatological Science

Clinical Summary

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What was studied

A single-patient case report describing cutaneous metastasis from breast carcinoma in which the tumor expressed SARS-CoV-2 spike protein, noted as possibly vaccine-derived. No comparator or timeframe is provided.

Key findings

In one patient, the skin metastasis from breast cancer showed expression of SARS-CoV-2 spike protein.

Study limitations

Single case report with no control or comparator; any link between mRNA vaccination and tumor spike protein expression is not established.