Recognizing a Mediastinal Mass: A Case of Primary Mediastinal Large B-Cell Lymphoma With Pruritus in a 23-Year-Old Adult Male Sailor.

Primary mediastinal large B-cell lymphoma (PMBCL) is a rare, non-Hodgkin, B-cell lymphoma thought to originate from thymic B cells, which occurs primarily in young adults such as in the active duty population. Primary mediastinal large B-cell lymphoma (PMBCL) presents as a large mediastinal mass, posing risks to the cardiopulmonary safety of patients and challenging the routine approach to diagnosis. We describe a case of a 23-year-old male sailor who presented to sick call on his ship while in port with shortness of breath, night sweats, 50-pound weight loss, and pruritic punched-out lesions on all extremities.

Interpreting Coronary Artery Disease Risk Through Gene-Environment Interactions in Gene Regulation.

GWAS and eQTL studies identified thousands of genetic variants associated with complex traits and gene expression. Despite the important role of environmental exposures in complex traits, only a limited number of environmental factors were measured in these studies. Measuring molecular phenotypes in tightly controlled cellular environments provides a more tractable setting to study gene-environment interactions in the absence of other confounding variables.

Comparison of Two Lidocaine Administration Techniques on Perceived Pain From Bedside Procedures: A Randomized Clinical Trial.

Background: Lidocaine is used to alleviate procedural pain but paradoxically increases pain during injection. Pain perception can be modulated by non-noxious stimuli such as temperature or touch according to the gate control theory of pain. We postulated that lidocaine dripped onto the skin prior to injection would cool or add the sensation of touch at the skin surface to reduce pain perception from the procedure.