Anterior Cutaneous Nerve Entrapment Syndrome Possibly Triggered by Oral Contraceptives

Daisuke Omura; Mikako Obika; Masaya Iwamuro; Satoko Nagao; Takahiro Nada; Takashi Matsuzaki; Yoshitaka Kondo; Fumio Otsuka

doi:10.2169/internalmedicine.1361-18

CASE REPORTS

Anterior Cutaneous Nerve Entrapment Syndrome Possibly Triggered by Oral Contraceptives

Daisuke Omura, Mikako Obika, Masaya Iwamuro, Satoko Nagao, Takahiro Nada, Takashi Matsuzaki, Yoshitaka Kondo, Fumio Otsuka

Author information

Daisuke Omura
Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
Mikako Obika
Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
Masaya Iwamuro
Department of Gastroenterology and Hepatology Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
Satoko Nagao
Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
Takahiro Nada
Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
Takashi Matsuzaki
Department of Anesthesiology and Resuscitology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
Yoshitaka Kondo
Department of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
Fumio Otsuka
Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan

Keywords: abdominal pain, ACNES, cutaneous nerve entrapment syndrome, oral contraceptives

JOURNAL OPEN ACCESS

2019 Volume 58 Issue 10 Pages 1507-1509

DOI https://doi.org/10.2169/internalmedicine.1361-18

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Abstract

We herein report a teenage girl who had been taking oral contraceptive pills for three months and complained of left lower abdominal pain that had continued for two months. A physical examination indicated anterior cutaneous nerve entrapment syndrome (ACNES), although no abnormality was found in various biochemical and imaging examinations. The pain was only transiently ameliorated by trigger-point injection, and neurectomy surgery was eventually effective. Sex steroids can be involved in the progress of local tissue edema causing ACNES. ACNES should be considered in cases of abdominal pain in patients taking oral contraceptives.

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