The absence of extracellular mucin distinguishes plasmacytoid urothelial carcinoma from mucinous adenocarcinoma with signet-ring cell
features (hematoxylin-eosin, original magnification X200 [A and B]).
Primary signet-ring cell
carcinoma of urinary bladder.
Synchronous occurrence of carcinoid, signet-ring cell
carcinoma and heterotopic pancreatic tissue in stomach: A case report and literature review.
 found that in EGCs, irrespective of clinicopathologic features or prognosis, signet-ring cell
cancer was similar to differentiated type cancer in behavior.
Hansel, "Clinicopathologic features and utility of immunohistochemical markers in signet-ring cell
adenocarcinoma of the bladder," Human Pathology, vol.
Finally, up to date, only 4 publications of case report for primary PD with signet-ring cell
carcinoma are recorded in literature [17-20].
Here we report a case of a 20-year-old man who was diagnosed with stage IVB signet-ring cell
adenocarcinoma of the colon (T4 N2 M1, with peritoneal carcinomatosis).
Histopathological analysis showed signet-ring cell
carcinoma which involved the submucosal layers of the stomach (pT1aN0M0: stage Ia).
Ogura, "Primary signet-ring cell
carcinoma of the urinary bladder," Urology, vol.
Table 1: WHO Classification of Tumours of the Appendix Epithelial Tumours Adenoma Carcinoma Adenocarcinoma Mucinous adenocarcinoma Signet-ring cell
carcinoma Small cell carcinoma Undifferentiated carcinoma Carcinoid Tubular carcinoid Goblet cell carcinoid (Mucinous carcinoid) Mixed carcinoid-adenocarcinoma Others Non-Epithelial Tumours Neuroma, Lipoma, Leiomyoma Gastrointestinal stromal tumour Leiomyosarcoma, Kaposi sarcoma Malignant Lymphoma Secondary tumours and Hyperplastic (Metaplastic) polyp Courtesy-WHO Classification of Tumours (Ref 9)
Herein, we report the use of venoarterial extracorporeal membrane oxygenation (VA-ECMO) and Novalung pumpless extracorporeal lung assist (pECLA) as a bridge to diagnosis of pulmonary tumor embolization secondary to gastric signet-ring cell
(1) Even rarer is signet-ring cell
carcinoma (SRCC), a histologic subtype of adenocarcinoma, which often presents late in stage, with a poor prognosis, and is considered resistant to chemotherapy and radiation.