Benign paravertebral cyst of Hattori: A case report and review of literature

Abstract

Hideo Hattori reported the first case of a mediastinal cyst with features characteristic of a Mullerian cyst in 2005. He presented a case of an 18-year-old woman who presented with an abnormal shadow on chest X-ray film during medical examination and who had no other anatomic abnormalities or clinical problems. We present a case of benign cyst within the mediastinum in the left paravertebral space at the level of the aortic arch in a 56-year-old woman. This patient was being investigated for unexplained shortness of breath and dry cough. As at the time writing this report, to our knowledge, this is the first case report of Hattori cyst in the United Kingdom (UK) following literature search.

Cyst of Hattori: A Rare Cyst in the Posterior Mediastinum

“…As noted by Idaewor, cysts of Hattori are essentially benign, and surgical removal is only necessary to alleviate patient discomfort. 1 Our reported lesion began as a misdiagnosis, as have several others in the literature. [4][5][6] As Kawaguchi reports, mediastinal Mullerian cysts typically present on CT scans in contact with a vertebral body, a presentation consistent with our study.…”

“…Because it is rare for Mullerian cysts to occur outside of the pelvis, and the mediastinum is not included in the secondary Mullerian system, it has been hypothesized that cysts of Hattori are congenital choriostomas. 1,5,10 No embryonic Mullerian structures have been identified in the pleura and pericardium as well. 1 Our patient was unique in the globus sensation and choking sensation that she reported.…”

“…1,5,10 No embryonic Mullerian structures have been identified in the pleura and pericardium as well. 1 Our patient was unique in the globus sensation and choking sensation that she reported. However, it is important to note that she was initially asymptomatic, consistent with approximately 55% of reported cases 3 and that her symptoms were significantly improved by an esophageal dilation performed at an outside facility, suggesting that her complaints were unrelated to the cyst.…”

“…Of all mediastinal masses, 10–12% are congenital cysts that are primary to the mediastinum, and of those, an unknown proportion are of Mullerian origin. 1 These cysts, known as cysts of Hattori after their discovery by Hideo Hattori in 2005, can be distinguished by a lining of ciliated non-stratified cuboidal and columnar epithelium positive for both estrogen and progesterone receptors. 2 Due to the rarity of these cysts – to date, approximately 40 have been identified in the literature, 3 their origin remains unclear.…”

Posterior Mediastinal Paravertebral Müllerian Cyst (Cyst of Hattori): Literature Review

“…In 2010, a paper discussing the pathogenesis of cyst of Hattori by Batt et al suggested that the cyst originated from the primary Müllerian tissue similar to the postulated pathogenesis of Mayer-Rokitansky-Kuster-Hauser syndrome (MRKH). This syndrome is characterized by the failure of the Müllerian duct to develop, resulting www.journals.viamedica.pl in absence of the uterus and variable degrees of vaginal hypoplasia or agenesis [8]. Other theories include the notion that Müllerian cysts of Hattori may represent metaplastic changes of the mesothelium into ciliated epithelium [7].…”