TTF1 expression

Next-generation selected cases detected the commonly identified oncogenic variants including those in BRAF, RAS, TP53, and TERT promoter. Overall, we hereby demonstrate that SATB2 IHC may be used to support the diagnosis of ATC.

The useful clues include presence of cellular papillae, mild cellular atypia, morphological diversity, interstitial foam-like cell aggregates, and prominent background hemorrhage and sclerosis. The characteristic immunophenotype and middle-aged female predilection are also helpful for the diagnosis of PSP.

NSCLC with co-expression of p40 and TTF1 exhibits distinct clinicopathological features, immunophenotypes, molecular alterations, and clinical outcomes, characterized by rapid progression and poor prognosis. Pathologists should be vigilant in recognizing this entity to avoid misdiagnosis and missed diagnosis.

Diagnosis of PSCCT necessitates multidisciplinary assessment, incorporating clinical symptoms, imaging, histomorphology, and immunohistochemistry. This study, for the first time, reveals the presence of HPV DNA in both PTC and PSCCT, occurring concurrently but separately. Given the limited scope of 3 case reports, definitive conclusions cannot be drawn, warranting further investigation.

Rather, it acts in cis to suppress 47S preinitiation complex formation and hence de novo pre-rRNA synthesis by a mechanism reminiscent of promoter interference or occlusion. Taken together, our data delineate a pathway from p19ARF to cell growth suppression via the regulation of ribosome biogenesis by noncoding RNAs and validate a key cellular growth law in mammalian cells.

Immunostaining for TTF1 and PAX8 can help in distinguishing PMM from PLA in the diagnosis of pulmonary lesions detected in patients with a history of MA/MLA.

We present a case report of a 76-year-old male with a histologically confirmed KRAS mutated, thyroid transcription factor 1 (TTF1) positive, grade 1, mucinous adenocarcinoma with cytologically difficult to interpret lymph node metastasis showing loss of TTF1 expression and overlapping features with goblet cell hyperplasia. The case highlights the importance of molecular testing in aiding diagnosis and guiding treatment of non-small cell lung carcinomas (NSCLC).

Primary pulmonary gangliocytic paragangliomas should be distinguished from carcinoid tumors, given the different natural histories and risk stratification approaches for these morphologically similar tumors. Awareness that gangliocytic paraganglioma may occur in the lung and appropriate immunohistochemical studies are key to correct diagnosis.

FLCN alterations are exceedingly rare in TCa with an incidence of pathogenic changes below 1%. However, FLCN may exceptionally serve as a key driver mutation in TCa, based on our index patient. Identification of FLCN mutations may be clinically important due to possible presence of a germline mutation predisposing to renal tumors and potential responsiveness to immune checkpoint inhibitors.

Conclusions. Lung carcinoma with p40/TTF1 coexpression is a rare tumor with high metastatic potential and may originate from p40/TTF1 coexpression cells in distal bronchial mucosa.

It is necessary to identify this subset of lung adenocarcinoma by carrying out BRG1 stain routinely on lung adenocarcinoma. These patients can then be identified and benefit from targeted therapies.

We detected associations, not described so far, between immunohistochemical expression and specific gene variants, which could have an impact on the treatment of NSCLC patients.

Certain PitNET subtypes have been recognized as clinically more aggressive, referred to as high-risk PitNETs. However, it is worth noting that the classification does not introduce a new grading system for PitNETs.

Our laboratory evaluated an immunosuppression protocol in BALB/c mice to test how lung tumors (i.e., A549 cell line and patient-derived Non-small cell lung adenocarcinoma primary culture) behave when injected intradermally Following an IACUC-approved protocol, locally-sourced BALB/c mice were acclimated and subjected to a modified immunosuppression protocol involving a combination of cyclosporin injection and oral gavage of ketoconazole. Albeit preliminary, the results show the potential of xenotransplantation of tumors in immunosuppressed BALB/c mice as a simple protocol to simulate tumor metastasis in mice, that can be used for therapeutic guidance and circumventing the requirement for the more expensive athymic mice in low-resource settings.