A postmenopausal woman with lobular breast carcinoma metastatic to a large ovarian fibrothecoma is presented. The two metastatic tumor nodules were grossly subtle and could have been overlooked in the background of the large ovarian stromal tumor. Thorough sampling of the tumor for histologic examination and supporting immunohistochemical stains were important in establishing the diagnosis. Differential diagnostic considerations are discussed.
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http://dx.doi.org/10.1080/01478885.2020.1773638 | DOI Listing |
Am J Surg Pathol
January 2025
Instituto de Anatomia Patológica, Faculdade de Medicina da Universidade de Lisboa.
E-cadherin (E-cad) immunohistochemistry is commonly used to distinguish lobular carcinoma in situ (LCIS) from ductal carcinoma in situ in histologically uncertain or ambiguous cases. Although most LCIS cases show an absence of E-cad expression on the neoplastic cell membranes, some show aberrant E-cad expression which can lead to diagnostic confusion. Awareness and understanding of the frequency, patterns, and distribution of aberrant E-cad staining in LCIS is crucial to achieving a correct diagnosis.
View Article and Find Full Text PDFEuroasian J Hepatogastroenterol
December 2024
Department of General Surgery, King Hamad University Hospital, Muharraq, Bahrain.
Background: Colorectal metastasis from primary breast cancer is rare and presents a challenge for diagnosis and treatment.
Aim: To report two cases of colorectal metastasis from a primary invasive lobular breast carcinoma (ILBC) with different presentations while discussing the mode of diagnosis, immunohistochemistry (IHC), course of treatment, and response.
Case 1: A 47-year-old female, with a known case of bilateral invasive lobular breast cancer, was diagnosed in 2015 and staged as p Tx N3 M0.
Arch Pathol Lab Med
January 2025
From the Divisions of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas (Gan, Y Ding, Wu, Zhang, Meng, QQ Ding, Han).
Objective.—: To report the isolation and significance of C kroppenstedtii, features of patients with GLM, pathologic findings and mechanism, bacteriologic workup, and optimal treatment.
Design.
J Clin Med
December 2024
Multidisciplinary Breast Centre, Dipartimento Scienze della Salute della Donna e del Bambino e di Sanità Pubblica, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, 00168 Rome, Italy.
: B3 breast lesions, characterized by uncertain malignant potential, pose a significant challenge for clinicians. With the increasing use of preoperative biopsies, there is a need for careful management strategies, including watchful waiting, vacuum-assisted excision (VAE), and surgery. This study aims to assess the concordance between preoperative biopsy findings and postoperative histology, with a focus on evaluating the positive predictive value (PPV) for malignancy in B3 lesions.
View Article and Find Full Text PDFDetermining whether an ipsilateral breast carcinoma recurrence is a true recurrence or a new primary remains challenging based solely on clinicopathologic features. Algorithms based on these features have estimated that up to 68% of recurrences might be new primaries. However, few studies have analyzed the clonal relationship between primary and secondary carcinomas to establish the true nature of recurrences.
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