Extranodal extension on MRI after neoadjuvant chemoradiotherapy improves the prognostic contribution of nodal evaluation in rectal cancer.

Objectives: Evaluation of extranodal extension (ENE) after neoadjuvant chemoradiotherapy (nCRT) might improve the currently suboptimal prognostic implication of preoperative nodal evaluation in rectal cancer, but evidence is lacking. The aim of this study was to evaluate diagnostic accuracy and prognostic value of MRI-determined ENE after nCRT in rectal cancer.

Materials And Methods: This single-center study included a prospective developing dataset and a retrospective validation cohort, which enrolled patients who underwent nCRT and surgery from 2021 to 2023 and 2018 to 2019, respectively.

Synthesis of 25-hydroxycholesterol from bisnoralcohol.

25-Hydroxycholesterol not only exhibits various important biological activities but also plays a crucial role in the synthesis of 25-hydroxyvitamin D. To date, researchers have proposed multiple synthetic routes for 25-hydroxycholesterol. Herein, a novel synthetic method for 25-hydroxycholesterol is described, involving a seven-step reaction that starts from economical and commercially available plant-derived bisnoralcohol, with an overall yield of up to 43.

A method of matching nodes between MRI and pathology with MRI-based 3D node map in rectal cancer.

Purpose: To propose a node-by-node matching method between MRI and pathology with 3D node maps based on preoperative MRI for rectal cancer patients to improve the yet unsatisfactory diagnostic performance of nodal status in rectal cancer.

Methods: This methodological study prospectively enrolled consecutive participants with rectal cancer who underwent preoperative MRI and radical surgery from December 2021 to August 2023. All nodes with short-axis diameters of ≥ 3 mm within the mesorectum were regarded as target nodes and were localized in three directions based on the positional relationship on MRI and drawn on a node map with the primary tumor as the main reference, which was used as a template for node-by-node matching with pathological evaluation.

Synthesis and antibacterial activities of heterocyclic ring-fused 20(S)-protopanaxadiol derivatives.

Multidrug-resistant (MDR) bacterial infections are becoming a life-threatening issue in public health; therefore, it is urgent to develop novel antibacterial agents for treating infections caused by MDR bacteria. The 20(S)-protopanaxadiol (PPD) derivative 9 was identified as a novel antibacterial hit compound in screening of our small synthetic natural product-like (NPL) library. A series of novel PPD derivatives with heterocyclic rings fused at the C-2 and C-3 positions of the A-ring were synthesized and their antibacterial activities against Staphylococcus aureus (S.

Extranodal Extension at Pretreatment MRI and the Prognostic Value for Patients with Rectal Cancer.

Background Detection of extranodal extension (ENE) at pathology is a poor prognostic indicator for rectal cancer, but whether ENE can be identified at pretreatment MRI is, to the knowledge of the authors, unknown. Purpose To evaluate the performance of pretreatment MRI in detecting ENE using a matched pathologic reference standard and to assess its prognostic value in patients with rectal cancer. Materials and Methods This single-center study included a prospective development data set consisting of participants with rectal adenocarcinoma who underwent pretreatment MRI and radical surgery (December 2021 to January 2023).

Analysis of enhanced CT imaging signs and clinicopathological prognostic factors in hepatoid adenocarcinoma of stomach patients with radical surgery: a retrospective study.

Background: To investigate the association between CT signs and clinicopathological features and disease recurrence in patients with hepatoid adenocarcinoma of stomach (HAS).

Methods: Forty nine HAS patients undergoing radical surgery were retrospectively collected. Association between CT and clinicopathological features and disease recurrence was analyzed.

Efficacy evaluation of different measurement methods for target lesions after neoadjuvant chemotherapy and radical radiotherapy in locally advanced hypopharyngeal carcinoma.

Aim: To assess the diagnostic efficacy in response evaluation of hypopharyngeal carcinoma (HPC) using different CT measurement methods.

Methods And Materials: One hundred and three patients with locally advanced HPC receiving neoadjuvant chemotherapy (NACT) and radical radiotherapy (RT) were retrospectively enrolled. The long diameter, short diameter and largest axial area of the tumors and the largest metastatic cervical lymph node (LN) were measured before and after NACT, at the end of RT and 1 month after RT.