P40 tank. Answers A and B are incorrect because while CK7 and CK5/6 would also both be positive in this lesion, they would not prove squamous differentiation, as they are positive in the majority of lung carcinomas. p40 is a truncated, nontransactivating p63 isoform that may stimulate cell proliferation, block apoptosis and favor unrestrained tumor growth Immunostains, routine stains and CD markers at PathologyOutlines. Addition of mucicarmine is useful in occasional cases of TTF1 negative adenocarcinomas. comig Nov 25, 2022 · A basic panel of TTF1 and p40 is sufficient to classify most lung tumors. Jan 21, 2025 · NUT carcinoma (see comment) Comment: Immunostains show that the tumor cells are positive for AE1 / AE3, p40 and NUT and negative for CD99 and synaptophysin with intact SMARCB1 (INI1), supporting the above diagnosis. Jul 30, 2021 · Typically p63 positive / p40 negative, whereas adenoid cystic carcinoma is typically positive for both p63 and p40 (Am J Surg Pathol 2014;38:257) HPV related multiphenotypic sinonasal carcinoma: Also can affect sinonasal tract and show similar morphology and expression May have surface dysplasia Positive for high risk HPV; negative for MYB-NFIB Aug 8, 2023 · C. NUT carcinoma is a rare, highly aggressive malignancy that is defined by translocations involving the NUTM1 gene. p40 is the stain of choice for the identification of squamous cell carcinoma and will help demonstrate squamous differentiation. Oct 30, 2020 · Cervix - Squamous metaplasia Transformation zone defined as area of newly formed squamous epithelium Junction between squamous and columnar cervical epithelium is called squamocolumnar junction Transformation zone is defined as the area of newly formed squamous epithelium (between the original squamocolumnar junction and the functional / current squamocolumnar junction) Immature squamous Mar 4, 2021 · Expression of p40 Metastatic sarcomatoid carcinoma Expression of claudin 4 might be helpful Sarcoma (primary or metastatic) Lack of expression of keratin Expression of lineage specific markers Presence of disease defining molecular alterations such as t (X;18) and rearrangements of SS18 gene Metastatic carcinoma Aug 17, 2022 · Thymoma is a malignant epithelial tumor of the thymic gland with lobulated architecture Feb 13, 2023 · Benign salivary gland tumor composed of oncocytic epithelial cells lining papillary and cystic structures in a lymphoid stroma. Such undifferentiated tumors, in small biopsies, are primarily classified as non-small cell carcinoma with further classifications being favored based on the results of ancillary studies. lekhgi prmi feaqo myvy vrlipen anmuv dxym nlei zuxq zgcj