Combined Tumor Infiltrating Lymphocytes and PD-L1 Status in Recurrent/Metastatic Head and Neck Squamous Cell Carcinoma.

Objectives: To determine if the assessment of CD8+ tumor-infiltrating lymphocytes (TILs) adds prognostic information to the PD-L1 combined positive score (CPS) in recurrent/metastatic (R/M) head and neck squamous cell carcinoma (HNSCC).

Methods: A retrospective case series was performed of 77 patients with R/M HNSCC between 2003 and 2019. From pre-treatment biopsies, CD8+ TILs and PD-L1 CPS were quantified on a tissue microarray.

TSC2 loss in neural progenitor cells suppresses mRNA translation of neurodevelopmental genes.

Tuberous sclerosis complex (TSC) is an inherited multi-system neurocutaneous disorder where patients often present with neurodevelopmental manifestations such as epilepsy and TSC-associated neuropsychiatric disorder (TAND) that includes autism spectrum disorder (ASD). TSC is caused by inactivating mutations in TSC1 or TSC2 tumor suppressor genes, with encoded proteins hamartin (TSC1) and tuberin (TSC2) forming a functional complex inhibiting mechanistic target of rapamycin complex 1 (mTORC1) signaling. This has led to treatment with allosteric mTORC1 inhibitor rapamycin analogs ("rapalogs") for TSC tumors; however, rapalogs are ineffective for treating neurodevelopmental manifestations.

Clinical impact and safety of brain biopsy in unexplained central nervous system disorders: a real-world cohort study.

Objective: A substantial part of central nervous system (CNS) disorders remains unexplained, despite various new and minimally invasive diagnostic techniques. Within this rapidly developing diagnostic field, the precise role of brain biopsy is unknown. We aimed to study the clinical impact and safety of brain biopsies in unexplained CNS disorders.

An Examination of Grade Appeals via a Root Cause Analysis.

Undergraduate medical educators seek to optimize student learning, improve grading transparency and fairness, and provide useful information to residency programs. Recently, the United States Medical Licensing Examination's shift to pass/fail scoring for Step 1 disrupted curricular and assessment operations, and schools' tiered grading practices have been scrutinized. In noting that significant institutional time and energy were being expended in addressing the current levels of student grade appeals, 6 public and private medical schools in the Northeastern United States engaged in an examination of grade appeals via a root cause analysis (RCA).