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01.12.2012 | Case report | Ausgabe 1/2012 Open Access

World Journal of Surgical Oncology 1/2012

Granular cell tumors: a report of six cases

World Journal of Surgical Oncology > Ausgabe 1/2012
Kei Aoyama, Takako Kamio, Azusa Hirano, Akiyoshi Seshimo, Shingo Kameoka
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1186/​1477-7819-10-204) contains supplementary material, which is available to authorized users.

Competing interest

The authors declare no conflicts of interest with respect to authorship and/ or publication of this article.

Authors’ contributions

KA designed the study, researched the literature, and drafted the manuscript. TK, AH, AS, and SK participated in the study design and coordination, and helped to collect data. All authors have read and approved the manuscript.


Granular cell tumor is a soft tissue neoplasm that originates in the nervous system and arises at virtually any body site, but is mainly found in the skin, oral cavity or digestive tract. Most are benign and reportedly malignant cases are rare, occurring in only 1% or 2% of cases. We report on our findings in six patients who developed granular cell tumor in the mammary gland, esophagus, subcutaneous tissue and muscle. Of six patients, two had granular cell tumor located in the breast, two in the submucosa of the esophagus, and the other two under the skin of the left axillary cavity and in the right latissimus dorsi muscle, respectively. One of the two patients with tumor in the submucosa of the esophagus also had esophageal cancer. Patients’ age ranged from 41 to 70 years (average, 59.1 years). Two patients with tumor in the submucosa of the esophagus were men, and the others were women. All of them were given a diagnosis of granular cell tumor by tissue biopsy and examination of excised specimens, but no evidence of malignancy was found. No recurrence has been noted in the patients who underwent surgical tumor removal.
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