- Published on
Pathology - Ductal carcinoma in situ
Definition: Neoplastic intraductal epithelial proliferation in the breast, possessing an inherent but not guaranteed risk of development to invasive breast cancer.
Epidemiology
• Prevalent. • The incidence has significantly risen following the implementation of breast screening programs. Aetiology: Risks analogous to invasive breast carcinoma
Genetics • Low-grade ductal carcinoma in situ (DCIS) frequently exhibits loss of homozygosity at 16p. High-grade DCIS has genetic distinctiveness characterized by a more intricate karyotype.
Presentation: 85% are identified on mammography as regions of microcalcification. • Ten percent exhibit clinical manifestations include a lump, nipple discharge, or eczematous alterations of the nipple (Paget's disease of the nipple). • Five percent are detected inadvertently in breast specimens excised for alternative purposes.
Macroscopy :DCIS is frequently macroscopically imperceptible, even to a seasoned pathologist. Extensive high-grade DCIS may present as gritty yellow flecks resulting from calcified necrotic debris within the affected ducts.
Histopathology: DCIS is categorized into low, middle, and high nuclear grades. Low-grade DCIS is characterized by small, uniform cells exhibiting cribriform, solid, or micropapillary patterns, with pronounced cellular polarization, wherein the nuclei are basally located and the apical cytoplasm is oriented towards the duct lumen. Central necrosis within the duct is unusual. Intermediate-grade DCIS exhibits cells characterized by moderately large nuclei and coarse chromatin, proliferating in solid, cribriform, or micropapillary architectures with a moderate level of cellular polarization. Central necrosis may be observed. High-grade DCIS exhibits cells characterized by big, significantly pleomorphic nuclei, clumped chromatin, conspicuous nucleoli, and diminished cellular polarization. Central necrosis is prevalent.
Prognosis: Complete surgical excision with clear margins is curative. The prognosis is contingent upon the persistence of malignant cells following treatment. Recurrence is more probable in cases of severe illness, elevated nuclear grade, and the existence of comedo necrosis.
Definition: Neoplastic intraductal epithelial proliferation in the breast, possessing an inherent but not guaranteed risk of development to invasive breast cancer.
Epidemiology
• Prevalent. • The incidence has significantly risen following the implementation of breast screening programs. Aetiology: Risks analogous to invasive breast carcinoma
Genetics • Low-grade ductal carcinoma in situ (DCIS) frequently exhibits loss of homozygosity at 16p. High-grade DCIS has genetic distinctiveness characterized by a more intricate karyotype.
Presentation: 85% are identified on mammography as regions of microcalcification. • Ten percent exhibit clinical manifestations include a lump, nipple discharge, or eczematous alterations of the nipple (Paget's disease of the nipple). • Five percent are detected inadvertently in breast specimens excised for alternative purposes.
Macroscopy :DCIS is frequently macroscopically imperceptible, even to a seasoned pathologist. Extensive high-grade DCIS may present as gritty yellow flecks resulting from calcified necrotic debris within the affected ducts.
Histopathology: DCIS is categorized into low, middle, and high nuclear grades. Low-grade DCIS is characterized by small, uniform cells exhibiting cribriform, solid, or micropapillary patterns, with pronounced cellular polarization, wherein the nuclei are basally located and the apical cytoplasm is oriented towards the duct lumen. Central necrosis within the duct is unusual. Intermediate-grade DCIS exhibits cells characterized by moderately large nuclei and coarse chromatin, proliferating in solid, cribriform, or micropapillary architectures with a moderate level of cellular polarization. Central necrosis may be observed. High-grade DCIS exhibits cells characterized by big, significantly pleomorphic nuclei, clumped chromatin, conspicuous nucleoli, and diminished cellular polarization. Central necrosis is prevalent.
Prognosis: Complete surgical excision with clear margins is curative. The prognosis is contingent upon the persistence of malignant cells following treatment. Recurrence is more probable in cases of severe illness, elevated nuclear grade, and the existence of comedo necrosis.
0 Comments
