No abstract

Summary Fetal rhabdomyoma is an extremely rare benign rhabdomyoblastic tumor with myotube-like differentiation, mainly arising on mucosal surfaces of the head and neck region of both children and young patients, almost invariably definitively treated with surgical excision. Herein the case of a male adult suffering from a recurrent fetal rhabdomyoma primary involving the bronchial structures is reported, along with a detailed literature review. This is the first fetal rhabdomyoma described to originate in such a localization; furthermore, an 11-year interval period between the first lesion and the recurrent one has never been reported.

Mesothelial/monocytic incidental cardiac excrescence (MICE) is a rare benign finding made of mesothelial cells, histiocytes, and fibrin, usually found during heart valve surgery. The clinical relevance resides in the potential misdiagnosis as metastatic carcinoma or arterial embolism. The pathogenesis remains uncertain, with artifactual and reactive hypotheses. Here we present a case of MICE with paradigmatic clinical, imaging, and histological features in a 28‐year‐old woman with undifferentiated connective tissue disease without previous cardiac catheterization with possible pathogenesis, highlighting the importance of awareness of the existence of this lesion in patients with autoimmune disease.