Subscribe to RSS
DOI: 10.1055/s-2007-966482
© Georg Thieme Verlag KG Stuttgart · New York
A case of early gastric cancer accompanied by a hamartomatous inverted polyp and successfully managed with endoscopic submucosal dissection
S. Ono, MD
Department of Internal Medicine
Hitachi General Hospital
2-1-1 Jonan-cho
Hitachi
Ibaraki
Japan
Fax: +81-294-238351
Email: satoshi-tky@umin.ac.jp
Publication History
Publication Date:
05 July 2007 (online)
A submucosal tumor (SMT) was found during a regular health check-up in a 59-year-old man. Following barium meal study the SMT was shown to be growing. He visited our hospital for further examination.
The upper gastrointestinal endoscopy revealed an SMT in the posterior wall of the upper third area of the stomach, with bridging fold and positive cushion sign ([Figure 1]). A focal discoloration of mucosa at the top of the SMT indicated the possibility of co-existence of gastric cancer. We therefore performed a biopsy of this mucosa, and irregular tubular structures were observed on pathologic studies. No malignancy was observed in the mucosa around the SMT. Endoscopic submucosal dissection was carried out for diagnostic therapy.
Pathologic examinations revealed irregular tubular structures limited to the mucosal layer, and an immunohistochemical test revealed p53-positive staining ([Figure 2]). In the submucosal layer, cystic dilated glands without atypia were observed, compatible with hamartomatous inverted polyp (HIP). These facts indicated early gastric cancer (IIb) on the surface of the HIP.
HIP is characterized pathologically as a proliferation of cystic dilated glands without atypia, accompanied by dendritic proliferation of the smooth muscle bundle [1]. HIP is very rare and difficult to diagnose. In addition, HIP is reported as a paracancerous lesion, and is associated with gastric cancers [1] [2]. Therefore, we have to diagnose it immediately and carefully with these points in mind during endoscopic studies, including biopsy. However, a superficial biopsy cannot be effective for critical diagnosis of submucosal lesions.
We propose that aggressive biopsy of SMT is necessary if equivocal findings are noted. Endoscopic submucosal dissection can be an effective procedure of diagnostic therapy for HIP and early cancer. Thus, HIP can be one of the differential diagnoses of SMT lesions of the stomach, and can be occasionally associated with early gastric cancer.
Endoscopy_UCTN_Code_CCL_1AB_2AD_3AB
#References
- 1 Mandai K, Moriwaki S, Doihara H. et al . Diffuse heterotopic glandular cysts of the stomach as a paracancerous lesion of gastric carcinoma (in Japanese with English abstract). Byori To Rinsho. 1991; 9 1217-1225
- 2 Iwanaga T, Koyama H, Furukawa H. et al . Diffuse submucosal cysts in the stomach as probable paracancerous lesion (in Japanese with English abstract). Nippon Shokakibyo Gakkai Zasshi. 1976; 73 31-40
S. Ono, MD
Department of Internal Medicine
Hitachi General Hospital
2-1-1 Jonan-cho
Hitachi
Ibaraki
Japan
Fax: +81-294-238351
Email: satoshi-tky@umin.ac.jp
References
- 1 Mandai K, Moriwaki S, Doihara H. et al . Diffuse heterotopic glandular cysts of the stomach as a paracancerous lesion of gastric carcinoma (in Japanese with English abstract). Byori To Rinsho. 1991; 9 1217-1225
- 2 Iwanaga T, Koyama H, Furukawa H. et al . Diffuse submucosal cysts in the stomach as probable paracancerous lesion (in Japanese with English abstract). Nippon Shokakibyo Gakkai Zasshi. 1976; 73 31-40
S. Ono, MD
Department of Internal Medicine
Hitachi General Hospital
2-1-1 Jonan-cho
Hitachi
Ibaraki
Japan
Fax: +81-294-238351
Email: satoshi-tky@umin.ac.jp