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Myoid hamartoma of the breast is an uncommon benign breast neoplasm. We describe an unusual example of an in-situ and invasive carcinoma arising in a myoid hamartoma. We also describe the unique molecular findings in the myoid hamartoma and review the pertinent literature.

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Benign myofibroblastic/epithelial lesions of the breast with minimally infiltrative margins.

Pathol Res Pract

October 2021

Department of Medical, Surgical Sciences and Advanced Technologies and Biotechnological Sciences G.F. Ingrassia, Anatomic Pathology, University of Catania, Via S. Sofia 87, 95123 Catania, Italy. Electronic address:

A minority of mixed fibro-epithelial lesions of the breast lacks both fibroadenoma and phyllodes architectural patterns and have been previously labeled with different terms, including "hamartomas", "myoid/muscular hamartomas", "benign fibroadenomatous lesions" or "stromo-epithelial lesions of the breast". This study emphasizes the clinico-pathologic features of 5 cases of mammary benign fibro(stromo)-epithelial lesions sharing as a common morphologic theme the presence of minimally infiltrative margins due to the overgrowth of the stromal component into the surrounding fibro-fatty tissue. Notably the radiological features were suspicious for malignancy in 3 out of 5 cases.

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Myoid (muscular) hamartoma is a rare form of benign breast hamartoma composed of differentiated mammary glandular and stromal structures, fatty tissue and areas of smooth muscle from which its name originates. It is considered to be a variant of a mammary hamartoma. We report the clinical presentation, imaging appearances and treatment of the initial and recurrent presentation of this rare tumour in a 61year old female, which mimicked malignancy.

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Myoid gonadal tumor. Case series, systematic review, and Bayesian analysis.

Virchows Arch

April 2021

Department of Pathology, Fondazione IRCCS Istituto Nazionale dei Tumori, via Venezian 1, 20133, Milano, MI, Italy.

Myoid gonadal stromal tumor represents a rare testicular neoplasm displaying smooth muscular and gonadal stromal differentiation. This entity has very few cases reported in the literature that describe heterogeneous clinical and pathological characteristics. Bayesian statistics provides a useful framework to combine information from diverse sources.

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The function of the ureterovesical junction depends upon a peculiar structure, the adventitial fibromuscular sheath of Waldeyer, which coats the distal end of the ureter. The origin of the smooth muscle of Waldeyer's sheath (WS) is disputed. Evidence points more likely to an ureteral one.

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