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. 2023 May 22;9(1):87.
doi: 10.1186/s40792-023-01660-5.

Late recurrent gastric carcinoma 12 years after surgery with attenuation of CD44 variant 9 expression

Hirokatsu Hayashi  1 , Itaru Yasufuku  1 , Toshiya Higashi  1 , Wakana Chikaishi  1 , Ryoma Yokoi  1 , Masahiro Fukada  1 , Yuta Sato  1 , Ryuichi Asai  1 , Jesse Yu Tajima  1 , Chiemi Saigo  2 , Akitaka Makiyama  3 , Yoshihiro Tanaka  1 , Naoki Okumura  1 , Katsutoshi Murase  1 , Takao Takahashi  1 , Manabu Futamura  4 , Tamotsu Takeuchi  5 , Nobuhisa Matsuhashi  6
Affiliations

Late recurrent gastric carcinoma 12 years after surgery with attenuation of CD44 variant 9 expression

Hirokatsu Hayashi et al. Surg Case Rep. .

Abstract

Background: Late recurrence of gastric cancer at 10 years post-gastrectomy is extremely rare, and the underlying mechanism remains unclear. We report a para-aortic lymph node metastasis case that recurred 12 years postoperatively.

Case presentation: A 44-year-old woman pathologically diagnosed with moderately to poorly differentiated adenocarcinoma with pT2(SS)pN2cM0pStageIIIA according to the Japanese Classification of Gastric Carcinoma (the 13th Edition) underwent laparoscopic distal gastrectomy with D1 + lymph node dissection. She received adjuvant chemotherapy with tegafur-uracil (400 mg/day) for 2 years. At postoperative year (POY) 5, a swollen lymph node was detected in the No.16b1lat lymph node station. However, positron emission tomography (PET) revealed normal uptake, and the levels of tumor markers were within normal limits; hence, the possibility of metastasis was considered low, and the patient was placed under observation. At POY 12, computed tomography revealed an enlargement of the No.16b1lat lymph node station, and PET showed abnormal uptake. Endoscopic ultrasound-guided fine-needle aspiration revealed a moderately differentiated adenocarcinoma. Hence, a diagnosis of recurrence of gastric cancer was made. The patient underwent para-aortic nodal dissection (PAND) of No.16b1lat & int stations. Immunochemical staining results also suggested the recurrence of gastric cancer. However, the expression of CD44 variant 9 (CD44v9), a cancer stem cell marker for gastric adenocarcinoma, was attenuated in the recurrent lesions compared with that in the primary lesions. Postoperatively, she received chemotherapy with tegafur-gimeracil-oteracil (80 mg/day) for 1 year. Bone metastasis was observed at POY 4 after PAND, and the IHC analysis showed a HER2 score of 3 + in a needle biopsy specimen of bone metastasis. The expression of CD44v9 was slightly positive. The patient is being treated with chemotherapy with FOLFOX + trastuzumab.

Conclusions: A defense mechanism against reactive oxygen species has been reported as a mechanism causing recurrence of CD44v9-positive gastric cancer. Consequently, CD44v9-positive gastric cancer grows in metastatic organs, repeatedly self-renews, and proliferates to form recurrent lesions. In the present case, the degree of CD44v9 staining in recurrent lesions was suggested to be related to the recurrence time.

Keywords: CD44 variant 9; Gastric cancer; Late tumor recurrence.

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Conflict of interest statement

The authors declare that they have no competing interests.

Figures

Fig. 1
Fig. 1
a The tumor presented in the lesser curvature of the gastric angle. b Histopathologic examination of the surgical specimen revealed the superficial extension of intermediate to poorly differentiated adenocarcinoma and partial invasion of the serous membrane. On immunohistochemical analysis, the tumor cells were noted to be positive for CK7 (c) and negative for CK20 (d) and showed a Ki-67 labeling index of < 3% (e)
Fig. 2
Fig. 2
At postoperative year 5, computed tomography (a) /positron emission tomography (b) showed a 19 × 12 mm lymph node with no abnormal uptake in the No. 16b1lat lymph node station
Fig. 3
Fig. 3
At postoperative year 12, computed tomography (a) / positron emission tomography (b) detected a 30 × 14 mm lymph node with abnormal uptake in the No. 16b1lat lymph node station
Fig. 4
Fig. 4
a Histopathologically, proliferating adenocarcinoma cells demonstrated conjoined tubular structures. On immunohistochemical analysis, the tumor cells were positive for CK7 (b) and negative for CK20 (c) and showed a Ki-67 labeling index of less than 3% (d)
Fig. 5
Fig. 5
Case 1 (the present case): gastric cancer that recurred in para-aortic lymph nodes 12 years postoperatively. The expression of CD44 variant 9 (CD44v9) as primary (a)/recurrence (b): positive/slightly positive. Case 2: gastric carcinoma with para-aortic lymph node recurrence 5 years postoperatively. The expression of CD44v9 as primary (c)/recurrence (d): positive/negative or unclear. Case 3: esophagogastric junction carcinoma with skin metastasis 8 months postoperatively. The expression of CD44v9 as primary (e)/recurrence (f): positive/positive
See this image and copyright information in PMC

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