The results showed no causal relationship between SS and breast cancer molecular subtypes (luminal A-like, luminal B/HER2-positive-like, luminal B/HER2-negative-like, HER2-enriched-like and triple-negative breast cancer) or lung cancer histological subtypes (lung adenocarcinoma and squamous cell lung cancer). The gene discussed is ERBB2; the disease is triple-negative breast carcinoma.