A. Multiple myeloma is a malignant, clonal disorder of plasma cells that originates in the bone marrow. Itâs a relatively common disorder, accounting for 1% of all malignancies and 10% of all hematologic malignancies in adults.
torsion, n 1. , motion or state of torque in which one end of an anatomical component is twisted about its longitudinal axis as the opposite end is either immobile or moves in the opposite direction.
This is what I found out by googling.Sigmoid means S shaped. Tortuous means it's more curvy than usual, but rarely has particular significance. A tortuous sigmoid simply means that there are a lot of twists and turns. By itself, this is an anatomical variant and not linked to a specific diseaseHope this helps a bit.