New daily persistent headache with May-Thurner physiology and spinal epidural venous congestion: treatment with ascending lumbar vein embolization.

May-Thurner physiology (MTP) can lead to various congestion syndromes due to compression of the left common iliac vein (LCIV) by the right common iliac artery (RCIA). This compression may result in venous reflux through the lumbar vein, leading to congestion of the spinal epidural venous plexus (EVP), which could contribute to refractory headaches. This case report details the clinical course of a patient with severe refractory new daily persistent headache associated with MTP who underwent ascending lumbar vein (ALV) embolization. The patient is a 59-year-old female with a 3-year history of daily persistent headache which failed multiple migraine prevention therapies and minimally invasive procedures. Imaging studies revealed significant LCIV compression by the RCIA, retrograde ALV flow, and EVP congestion. The patient underwent ALV embolization, resulting in significant symptomatic relief. At the 22-month follow-up, headache severity reduced by 80%, with the patient no longer requiring routine headache medications. Additionally, treatment of associated pelvic congestion syndrome through gonadal vein embolization resolved longstanding associated pelvic pain and pressure. This case highlights the role of venous congestion in refractory headache syndromes and underscores the potential of targeted venous interventions, such as embolization, in their management. The findings expand on emerging evidence linking venous compression syndromes to headache pathophysiology and support exploring interventional strategies as viable treatment options for selected patients. Further research is needed to validate these findings and establish evidence-based guidelines for clinical practice.