Periodic thigh pain from radicular endometriosis
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This case report describes a woman with periodic left anterior thigh pain exacerbated by menstruation, ultimately diagnosed as probable neuropathic pain after extensive normal imaging and ineffective psychogenic treatment.
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Abstract
A 38-year-old woman gave a 2-year history of periodic left anterior thigh pain (figure 1), described as deep and excruciating. It would begin 2–3 days before menstruation. Its numerical rating scale score ranged from 5 to 7/10, rapidly peaked (up to 10/10), lasted 5–6 days and then vanished, with no pain between menses. She had seen various orthopaedic and pain medicine specialists, with a thorough radiological work-up, including lumbosacral MRI with gadolinium contrast (figure 2) and ultrasound scan and MR scan of the abdomen and pelvis, which were all normal. She was diagnosed elsewhere with psychogenic pain and treated with benzodiazepines, selective serotonin reuptake inhibitors and psychotherapy, with no effect.
Figure 1
The patient's pain distribution.
Figure 2
Lumbosacral MRI (L4–L5 levels) was normal, even with gadolinium.
She was referred for neurological consultation, which she considered ‘the last resort’, before stopping any further medical test or treatment and living with the pain that had ‘no organic cause but came from a wrong state of mind’. On examination, the left patellar reflex was decreased and the femoral nerve stretch test was mildly positive on the left. According to the neuropathic pain diagnostic algorithm, she had probable neuropathic pain (table …
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Too few in-corpus citations on either side for a chart; here are the lists.
Cites (1)
Cited by (4)
- Neural involvement in endometriosis: Review of anatomic distribution and mechanisms 2015
- Endometriosis as a Differential Diagnosis in a 17‐Year‐Old Patient with Low Back and Radicular Pain: A Case Report 2025
- Endometriosis as a Differential Diagnosis in a 17-Year-Old Patient with Low Back and Radicular Pain: A Case Report 2025
- Manejo laparoscópico y farmacológico del dolor de miembro pélvico en pacientes con endometriosis profunda: resultados de una serie de casos 2023
References (4)
- Phantom endometriosis of the sciatic nerve via openalex
- W2071960727 via openalex
- W2119542259 via openalex
- W2164513741 via openalex
Cited by (4)
- Endometriosis as a Differential Diagnosis in a 17‐Year‐Old Patient with Low Back and Radicular Pain: A Case Report 2025
- Endometriosis as a Differential Diagnosis in a 17-Year-Old Patient with Low Back and Radicular Pain: A Case Report 2025
- Manejo laparoscópico y farmacológico del dolor de miembro pélvico en pacientes con endometriosis profunda: resultados de una serie de casos 2023
- Neural involvement in endometriosis: Review of anatomic distribution and mechanisms 2015
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- europepmc
- last seen: 2026-08-31T06:09:41.840111+00:00
- openalex
- last seen: 2026-06-04T00:00:01.174412+00:00
- pubmed
- last seen: 2026-05-13T22:18:35.150238+00:00
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