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These lesions are preceded by atypical lobular hyperplasia and may follow a linear progression to invasive lobular carcinoma (ILC), with specific genetic aberrations. [3] This process coincides with the progression of ductal neoplasia to ductal carcinoma in situ and invasive carcinoma.
Atypical hyperplasia is a high-risk premalignant lesion of the breast. It is believed that atypical ductal hyperplasia (ADH) is a direct precursor for low-grade mammary ductal carcinoma , whereas atypical lobular hyperplasia (ALH) serves as a risk indicator.
Atypical adenomatous hyperplasia is a subtype of pneumocytic hyperplasia in the lung. It can be a precursor lesion of in situ adenocarcinoma of the lung (bronchioloalveolar carcinoma). In prostate tissue biopsy, it can be confused for adenocarcinoma of the prostate. The needle biopsy rate is less than 1%.
212.3 Bronchus and lung; 212.4 Pleura; 212.5 Mediastinum; 212.6 Thymus; 212.7 Heart. Myxoma; Rhabdomyoma; 213 Benign neoplasm of bone and articular cartilage. 213.9 Bone and articular cartilage, site unspecified Chondroma; 214 Lipoma; 215 Other benign neoplasm of connective and other soft tissue; 216 Benign neoplasm of skin. Melanocytic nevus ...
High-resolution CT image showing ground-glass opacities in the periphery of both lungs in a patient with COVID-19 (red arrows). The adjacent normal lung tissue with lower attenuation appears as darker areas. Ground-glass opacity (GGO) is a finding seen on chest x-ray (radiograph) or computed tomography (CT) imaging of the lungs.
Atypical adenomatous hyperplasia (AAH) is considered a pre-cancerous lesion, and is thought to further progress to adenocarcinoma in situ and invasive adenocarcinoma of the lung. The lesions of AAH are <5 mm, can be single or multiple, and have a ground glass appearance on CT imaging.
A multi-step carcinogenesis hypothesis suggests a progression from atypical adenomatous hyperplasia (AAH) through bronchioalveolar carcinoma (BAC) to invasive adenocarcinoma (AC), but to date this has not been formally demonstrated. [1]
Presence of high-risk breast lesions like lobular carcinoma in situ (LCIS), atypical ductal hyperplasia (ADH) and atypical lobular hyperplasia (ALH). [7] Having dense breasts or breasts with diffuse microcalcification, as the screening for breast cancer is made difficult.