An Exceptional Coexistence: Primary Hepatic Leiomyosarcoma and Basal Cell Carcinoma: A Case Report

Background: Primary hepatic leiomyosarcoma (LMSH) is a rare nosological entity originating from the mesenchymal lineage. Its co-occurrence with basal cell carcinoma (BCC), a neoplasm of epithelial origin, constitutes an exceptionally rare and poorly documented association. We present the case of a 43-year-old patient whose clinical course was marked by the successive diagnosis of these two distinct pathologies.

Case Presentation: In 2015, a primary LMSH was managed with surgical resection followed by adjuvant chemotherapy (doxorubicin and ifosfamide). Subsequently, the development of locally advanced and unresectable BCC in 2018 required targeted therapy with vismodegib, a Hedgehog pathway inhibitor. This case highlights the therapeutic challenges posed by multiple primary neoplasms and underscores the importance of vigilant oncologic surveillance.

Conclusion: This rare coexistence emphasizes the need for multidisciplinary management and lifelong surveillance in patients with rare primary malignancies.