Modern clinical oncology has made great achievements over the last century. However, peritoneal metastasis from gastrointestinal cancer, as one of three most common metastasis modalities, was not re-recognized until the end of the last century, and a normative diagnosis and treatment system has been gradually beginning to be formed until today. This comment is to review the development history, reflect on the lessons and experiences in clinical practice, analyze the difficulties on redefinition, deep understanding and clinical management, and pain points on theory construction, technique practice and discipline construction, in the field of gastrointestinal cancer peritoneal metastasis. We suggested a solution to the difficulties and pain points by realizing the fact of burden of peritoneal metastasis, reinforcing technical training, and promoting collaborative researches, aiming to provide reference for the steady development of peritoneal surface oncology.
Humans ; Peritoneal Neoplasms/secondary* ; Gastrointestinal Neoplasms ; China ; Pain

Objective: To report a rare case of epididymal liposarcoma with multiple metastases to the retroperitoneal space and peritoneal cavity for the purpose of improving the diagnosis and treatment of the disease. METHODS: We retrospectively analyzed the clinical data about a case of epididymal liposarcoma with multiple metastases to the retroperitoneal space and peritoneal cavity, reviewed relevant literature at home and abroad, and investigated the presentation, diagnosis and treatment of the disease. RESULTS: A 47-year-old male patient with epididymal liposarcoma underwent radical left orchiectomy with high ligation of the spermmatic cord. Ten years later, recurrence and metastasis were observed in the retroperitoneal space with a mass of 15.6 × 9.4 × 25.5 cm occupying an area from the upper pole of the left kidney to the pelvic cavity and enclosing the left kidney and upper ureter, for which the patient received radical resection of the retroperitoneal tumor. However, multiple retroperitoneal and intraperitoneal metastases occurred again 4 years later, which was treated by another surgical resection. The patient died of lung failure a year later. CONCLUSIONS Epididymal liposarcoma is a rare entity, which can be diagnosed by careful clinical and radiological examinations and confirmed by pathology. For its treatment, radical inguinal orchiectomy should be performed as early as possible, but the roles of adjuvant radiotherapy and chemotherapy remain controversial. Given the high rate of recurrence and metastasis, long-term follow-up is necessitated for the patient postoperatively.
Epididymis ; pathology ; Genital Neoplasms, Male ; pathology ; Humans ; Kidney ; Liposarcoma ; pathology ; secondary ; Male ; Middle Aged ; Neoplasm Recurrence, Local ; Orchiectomy ; Peritoneal Cavity ; Peritoneal Neoplasms ; secondary ; Retroperitoneal Neoplasms ; secondary ; Retroperitoneal Space

Brain Diseases ; Humans ; Immune Checkpoint Inhibitors ; Peritoneal Neoplasms/secondary* ; Peritoneum/pathology* ; Stomach Neoplasms/surgery*

Peritoneal metastasis of gastric cancer serving as the most frequent form of metastasis, is one of the leading causes of death. A portion of surgically treated patients often suffer from small peritoneal residual metastasis, which will lead to recurrence and metastasis of gastric cancer patients after surgery. Given these, the prevention and treatment of peritoneal metastasis of gastric cancer deserves more attention. Molecular residual disease (MRD) refers to the molecular abnormalities of tumor origin that cannot be found by traditional imaging or other laboratory methods after treatment, but can be found by liquid biopsy, representing the possibility of tumor persistence or clinical progress. In recent years, the detection of MRD based on ctDNA has gradually become a research hotspot in the prevention and treatment of peritoneal metastasis. Our team established a new method for MRD molecular diagnosis of gastric cancer, and reviewed the research achievements in this field.
Humans ; Stomach Neoplasms/pathology* ; Peritoneal Neoplasms/secondary* ; Liquid Biopsy ; Neoplasm, Residual/genetics*

Adolescent ; Carcinoma, Hepatocellular ; secondary ; Female ; Heart Neoplasms ; secondary ; Humans ; Liver Neoplasms ; pathology ; Neoplasm Metastasis ; Pericardium ; Peritoneal Neoplasms ; secondary ; Portal Vein ; Vena Cava, Inferior

This study examined the mechanism by which the gastric cancer cells lead to early peritoneal metastasis. HMrSV5 cells, a human peritoneal mesothelial cell line, were co-incubated with the supernatants of gastric cancer cells. Morphological changes of HMrSV5 cells were observed. The cell damage was quantitatively determined by MTT assay. The apoptosis of HMrSV5 cells was observed under transmission electron microscope. Acridine orange/ethidium bromide-stained condensed nuclei was detected by fluorescent microscopy and flow cytometry. The expressions of Bcl-2 and Bax was immunochemically evaluated. The results showed that conspicuous morphological changes of apoptosis were observed in HMrSV5 cells 24 h after treatment with the supernatants of gastric cancer cells. The supernatants could induce apoptosis of HMrSV5 cells in a time-dependent manner. The supernatants could up-regulate the expression of Bax and suppress that of Bcl-2 in HMrSV5 cells. These findings demonstrated that gastric cancer cells can induce the apoptosis of HPMCs through supernatants in the early peritoneal metastasis. The abnormal expressions of Bcl-2 and Bax may contribute to the apoptosis. Anti-apoptosis drugs promise to be adjuvant chemotherapeutic agents in the treatment of peritoneal metastasis of gastric cancer.
Apoptosis ; Cell Line ; Cell Line, Tumor ; Coculture Techniques ; Epithelial Cells/*cytology ; Epithelium ; Peritoneal Neoplasms/pathology ; Peritoneal Neoplasms/*secondary ; Stomach Neoplasms/*pathology

Peritoneal metastasis is one of the common metastasis of gastrointestinal malignancy. Intraperitoneal chemotherapy (including hyperthermic intraperitoneal chemotherapy and intraoperative intraperitoneal chemotherapy) not only can effectively increase the peritoneal drug concentration, but also can reduce side effects of systemic chemotherapy. It can significantly prolong the long term survival of patients with peritoneal metastasis and improve the quality of life. In order to standardize the popularization and application of intraperitoneal chemotherapy, relevant professional committees have formulated expert consensus on intraperitoneal chemotherapy. However, there is no systematic guidance on the prevention and treatment of related complications of intraperitoneal chemotherapy. Under the guidance of the Complications Management Committee of the Colorectal Cancer Professional Committee of the Chinese Medical Association and the Colorectal Cancer Professional Committee of the Chinese Anti-cancer Association, we organized domestic experts in relevant fields to formulate this consensus according to the procedural specifications and relevant literature reports. This consensus aims to summarize the causes of common complications of intraperitoneal chemotherapy such as pneumonia, intraperitoneal hemorrhage, fever, peritonitis, ileus, intestinal dysfunction, anastomotic bleeding, anastomotic leakage, leakage or infection of perfusion tube, nausea and vomiting, myelosuppression, hepatic or nephritic dysfunction. After repeatedly soliciting the opinions of domestic authoritative experts and their discussion and modification, a consensus was formed to provide effective reference for the prevention and treatment of complications.
Humans ; Peritoneal Neoplasms/secondary* ; Hyperthermia, Induced ; Consensus ; Quality of Life ; Combined Modality Therapy ; Gastrointestinal Neoplasms/therapy* ; Perfusion ; Colorectal Neoplasms/surgery* ; China

OBJECTIVETo investigate the related factors and prognosis of peritoneal dissemination and hepatic metastasis in gastric cancer, and the impact of palliative surgery on the prognosis.

METHODSThe clinicopathologic and follow-up data of the patients with gastric carcinoma treated in our hospital from Aug. 1994 to Jul. 2005 were analyzed retrospectively.

RESULTSThe clinicopathologic factors correlated with peritoneal dissemination included serosal penetration, whole stomach cancer, undifferentiated type, female and hepatic metastasis, while those correlated with hepatic metastasis included Borrmann IV, lymph node metastasis and peritoneal dissemination (P< 0.05). The postoperative one-year survival rate of the patients with hepatic metastasis (H group) were lower than that of the patients with peritoneal dissemination (P group)(P< 0.05). The one- year survival rate of the patients with peritoneal dissemination undergoing palliative resection was significantly higher than that of the patients undergoing by-pass operation or feeding neostomy, and exploratory laparotomy (P< 0.05), while there was no significant difference among the three groups of the patients with hepatic metastasis.

CONCLUSIONSThe short-term prognosis of the patients with hepatic metastasis is poorer than that of the patients with peritoneal dissemination. Palliative resection could improve the short-term survival rate of the patients with peritoneal dissemination, while it had no significant impact on the survival rate of the patients with hepatic metastasis.

Female ; Follow-Up Studies ; Humans ; Liver Neoplasms ; mortality ; secondary ; Male ; Middle Aged ; Neoplasm Metastasis ; Peritoneal Neoplasms ; mortality ; secondary ; Prognosis ; Retrospective Studies ; Stomach Neoplasms ; mortality ; pathology ; Survival Rate

INTRODUCTIONSporadic colorectal cancers with BRAF mutations constitute two distinct subgroups of colorectal cancers. Recent studies have linked the presence of the BRAF mutation to a familial inheritance pattern. This was a proof-of-concept study that aimed to examine: (a) the extent of field change in sporadic colorectal cancers with BRAF mutation; and (b) the extent of resection margins required and the pattern of DNA mismatch repair protein loss in these tumours.

METHODSEight microsatellite instability-high tumours with positive BRAF mutation from an existing histopathological database were selected for BRAF mutation and mismatch repair protein analysis.

RESULTSAll the resection margins were negative for BRAF mutation. Three tumours had loss of MLH1 and PMS2 expressions, and five tumours had no protein loss. Six peritumoral tissues were negative and one was positive for BRAF mutation.

CONCLUSIONThe results suggest that any early field change effect is restricted to the immediate vicinity of the tumour and is not a pan-colonic phenomenon. Current guidelines on resection margins are adequate for BRAF mutation-positive colorectal cancers. Any suggestion of a hereditary link to these tumours is likely not related to germline BRAF gene mutations. The pattern of protein loss reinforces previous findings for the two subgroups of BRAF mutation-positive colorectal cancers.

Colorectal Neoplasms ; genetics ; pathology ; Female ; Humans ; Male ; Microsatellite Instability ; Mutation ; Neoplasm Metastasis ; Peritoneal Neoplasms ; pathology ; secondary ; Proto-Oncogene Proteins B-raf ; genetics ; Stomach Neoplasms ; pathology ; secondary

OBJECTIVETo develop a human ovarian carcinoma SKOV3 model in severe combined immunodeficiency (SCID) mouse and to study its biologic characteristics.

METHODSHuman ovarian carcinoma SKOV3 cells were injected intraperitoneally into female SCID mouse to establish a transplantation model of human ovarian carcinoma. The biological characteristics, metastasis and morphology of transplanted tumors were studied.

RESULTAll tumors grew progressively with no sign of regression. The tumor cells spread around the peritoneal cavity and mainly on the diaphragm, mesentery, peritoneum and around the liver, which was confirmed by histopathology. The morphology, growth pattern and CA125 secretion of primary culture of transplanted cells remained as same as those of ovarian carcinoma cell line SKOV3.

CONCLUSIONAn intraperitoneal transplantation model of human ovarian carcinoma SKOV3 in SCID mice has been developed successfully, which can simulate the biological behavior of peritoneal metastasis of human ovarian carcinoma.

Animals ; Disease Models, Animal ; Female ; Humans ; Mice ; Mice, SCID ; Neoplasm Transplantation ; Ovarian Neoplasms ; pathology ; ultrastructure ; Peritoneal Neoplasms ; secondary ; Transplantation, Heterologous