Lower back pain typically originates from degenerative disc or facet disease. Buttocks and posterior thigh pain typically originates from nerve root compression. Hip and groin pain can originate from the hip joint or from compression of higher nerves in the lumbar spine (L1-3).
You have isolated disc resorption at L5-S1 with foraminal stenosis (see website). This can cause generalized lower back pain and/or leg pain with standing and walking. The discs at L4-5 and L3-4 are slightly degenerative. These discs can cause mild-moderate lower back pain. Your L2-3 far lateral disc hernation on the right can compress the L2 nerve which can cause right sided hip and anterior thigh pain. The others above this level are not that important to your symptoms.
Donald Corenman, MD, DC is a highly-regarded spine surgeon, considered an expert in the area of neck and back pain. Trained as both a Medical Doctor and Doctor of Chiropractic, Dr. Corenman earned academic appointments as Clinical Assistant Professor and Assistant Professor of Orthopaedic Surgery at the University of Colorado Health Sciences Center, and his research on spine surgery and rehabilitation has resulted in the publication of multiple peer-reviewed articles and two books.