Case Of Mucinous Adenocarcinoma Research Articles

Clinicopathological features and prognosis analysis of proximal colonic mucinous adenocarcinoma

Mucinous adenocarcinoma (MAC) is a distinct subtype of colorectal cancer. Previous studies have confirmed the poor prognosis of rectal or left-sided colon MAC, while the prognosis and response to chemotherapy in proximal colon MAC remains controversial. The aim of this study was to investigate the clinicopathological characteristics, prognosis, response to chemotherapy, and risk prediction factors of proximal colon MAC. Patients with proximal colon MAC and non-mucinous adenocarcinoma (NMAC) were retrospectively analyzed in this study. The analyzed variables included gender, age, smoking, drinking, chemotherapy, metastasis, pathological stage, and tumor size. Overall survival (OS) was the primary outcome. Kaplan–Meier analysis was used to assess the impact of mucinous subtype and chemotherapy on OS. We conducted univariate and multivariate Cox regression analyses to determine prognosis factors for proximal colon MAC and NMAC. A total of 284 cases of proximal colon MAC and 1384 cases of NMAC were included in the study. Compared to NMAC, proximal colon MAC was diagnosed at a younger age. The proportion of synchronous and metachronous metastasis was also higher, as well as the pathological stage and tumor size. Proximal colon MAC had a worse prognosis than NMAC, especially in stage 3. Moreover, the prognosis of proximal colon NMAC improved after chemotherapy, while MAC showed no improvement in prognosis after chemotherapy. Advanced age, N1 and N2 stage were independent prognostic factors for adverse outcomes in MAC. For proximal colon adenocarcinoma, the independent predictors of adverse outcomes included mucinous subtype, order age, N1 and N2 stages, and pathological stage 4. Proximal colon MAC had a worse prognosis compared to NMAC. Chemotherapy did not improve the prognosis of proximal colon mucinous adenocarcinoma.

Nomogram model for the diagnosis of solitary nodular pulmonary mucinous adenocarcinoma

The objective of this study was to develop a nomogram model based on the natural progression of tumor and other radiological features to discriminate between solitary nodular pulmonary mucinous adenocarcinoma and non-mucinous adenocarcinomas. A retrospective analysis was conducted on 15,655 cases of lung adenocarcinoma diagnosed at our institution between January 2010 and June 2023. Primary nodular invasive mucinous adenocarcinomas and non-mucinous adenocarcinomas with at least two preoperative CT scans were included. These patients were randomly assigned to training and validation sets. Univariate and multivariate analyses were employed to compare tumor growth rates and clinical radiological characteristics between the two groups in the training set. A nomogram model was constructed based on the results of multivariate analysis. The diagnostic value of the model was evaluated in both the training and validation sets using calibration curves and receiver operating characteristic curves (ROC). The study included 174 patients, with 58 cases of mucinous adenocarcinoma and 116 cases of non-mucinous adenocarcinoma. The nomogram model incorporated the maximum tumor diameter, the consolidation/tumor ratio (CTR), and the specific growth rate (SGR) to generate individual scores for each patient, which were then accumulated to obtain a total score indicative of the likelihood of developing mucinous or non-mucinous adenocarcinoma. The model demonstrated excellent discriminative ability with an area under the receiver operating characteristic curve of 0.784 for the training set and 0.833 for the testing set. The nomogram model developed in this study, integrating SGR with other radiological and clinical parameters, provides a valuable and accurate tool for differentiating between solitary nodular pulmonary mucinous adenocarcinoma and non-mucinous adenocarcinomas. This prognostic model offers a robust and objective basis for personalized management of patients with pulmonary adenocarcinomas.

Rare Case of Mucinous Adenocarcinoma of Stomach with Calcified Metastasis in Liver

Rare Case of Mucinous Adenocarcinoma of Stomach with Calcified Metastasis in Liver

Primary mucinous gland lesions of fallopian tube: a clinicopathological analysis of fourteen cases

Objective: To investigate the clinical and pathological characteristics of primary mucinous gland lesions of the fallopian tubes. Methods: The clinical data, pathomorphological characteristics and immunophenotype of 14 cases of primary mucinous gland lesions of the fallopian tube diagnosed at Obstetrics and Gynecology Hospital of Fudan University from 2015 to 2023 were analyzed retrospectively. In addition, a comprehensive review of relevant literature was conducted. Results: The age of 14 patients ranged from 53 to 83 years, with an average of 65 years. Among them, 13 cases exhibited unilateral involvement while one case showed bilateral presentation. Nine cases were mucinous metaplasia of the fallopian tube, four cases were invasive mucinous adenocarcinoma and one case was mucinous carcinoma in situ. Morphologically, mucinous metaplasia of the fallopian tube was focal, with or without inflammation. The cells of mucinous adenocarcinoma or mucinous carcinoma in situ exhibited characteristics indicative of gastrointestinal differentiation. Immunohistochemical analysis revealed diffuse positive expression of CK7, and negative expression of SATB2. CDX2 demonstrated positive staining in two cases. One case exhibited diffuse and strongly positive mutant expression of p53, whereas the remaining cases displayed wild-type expression. MUC6 showed diffuse or focally positive staining in mucinous gland lesions characterized by gastric differentiation. Some cases of mucinous adenocarcinoma of fallopian tube were subject to AB-PAS staining, resulting in red to purple cytoplasmic staining. Conclusions: Primary mucinous lesions of the fallopian tube are exceedingly uncommon. All cases of mucinous adenocarcinoma of fallopian tubes in this study exhibit the morphology and immunohistochemical characteristics of gastrointestinal differentiation. Mucinous metaplasia of the fallopian tube is a benign lesion of incidental finding, which is closely related to inflammation or gastric differentiation. Mucinous lesions of cervix, ovary and digestive tract are excluded in all patients, confirming the independent existence of mucinous lesions within fallopian tubes.

The histopathological spectrum and molecular changes associated with KRAS G12C mutation in non-small cell lung carcinoma

KRAS G12C is the most common KRAS mutation in non-small cell lung carcinoma (NSCLC), for which targeted therapy has recently been developed. From the 732 cases of NSCLC that underwent next-generation sequencing at the Department of Anatomical Pathology, Liverpool Hospital, between July 2021 and May 2023, we retrieved 83 (11%) consecutive cases of KRAS G12C mutated NSCLC, and analysed their clinical, pathological, and molecular features. Of the 83 cases of KRAS G12C mutated NSCLC, there were 46 (55%) men and 37 (45%) women, with mean age of 72 years. Of the 49 cases with known clinical information, 94% were current or ex-smokers, and 49% were stage IV at diagnosis with median survival of 12 months. Sixty-three percent were histology cases and the remainder were cytology cases. Eighty-two percent were non-mucinous adenocarcinomas, with conventional histology including lepidic, acinar, solid, single cells and micropapillary patterns, and 62% were poorly differentiated. There were five (6%) cases of mucinous adenocarcinoma, one case of pleomorphic carcinoma and one case of high-grade fetal adenocarcinoma. TTF1 was positive in the majority (89%) of cases. Nineteen (23%) cases had TP53 co-mutation, and these cases had trends towards higher PD-L1 expression, poor differentiation, and presentation as stage IV disease, but the differences were not statistically significant. KRAS G12C mutated NSCLCs almost exclusively occurred in smokers and were mostly non-mucinous adenocarcinomas with conventional histological patterns which ranged from well to poorly differentiated. Around a quarter had TP53 co-mutation, the histological impacts and immune profile of which need to be assessed in a larger study.

Comparative analysis of tumor biology and prognosis in mucinous and signet-ring cell colon cancers versus classical adenocarcinoma.

Background: Limited information is currently available on the natural history and prognosis of two distinct histological subtypes of adenocarcinoma (AC) in the colon: mucinous adenocarcinoma (MAC) and signet-ring cell carcinoma (SRCC). Therefore, the aim of this study is to examine the clinicopathological characteristics of colon MAC and SRCC, comparing them to classical AC, using a large cohort of cases from the United States. Methods: Patients diagnosed with colon AC, MAC, or SRCC from the SEER database between 2000 and 2018 were included in our study. Incidence trends, patient demographics, tumor characteristics, treatment, and survival were analyzed. Results: In our study, we analyzed a total of 310,813 patients with colon cancers, including 271,382 cases of classical AC, 34,750 cases of MAC, and 4,681 cases of SRCC. Over the study period, we observed a decline in the age-adjusted incidence rates of colon AC, MAC, and SRCC. Notably, the MAC and SRCC cohorts differed significantly from AC in terms of patient characteristics, tumor locations, and treatment patterns. Patients with MAC and SRCC had poorer survival outcomes compared to those with AC. Factors associated with worse survival included older age, male sex, poorly differentiated tumors, advanced stage, and the presence of MAC or SRCC histology. On the other hand, surgical intervention was associated with improved survival. Conclusion: Our study underscores the significance of recognizing the distinct features and outcomes associated with different histological subtypes of colon cancer. Further research is warranted to delve into the underlying biological traits that contribute to these differences and to develop more tailored treatment strategies.

Case Report: A rare case of mucinous adenocarcinoma of the female urethra

Background: Urethral adenocarcinoma is a very uncommon problem in women, with a prevalence of 0.02%. Due to the disease's rarity, there is very little information available about it. Treatment for cancer can have a significant negative influence on a patient's condition. Mucinous adenocarcinomas are a very uncommon type of cancer that is poorly studied. These cancers almost invariably have a worse outcome compared to conventional adenocarcinomas. Case Presentation: A 67 year old woman presented with hematuria and stranguria. A computerised tomography (CT) scan of this patient revealed an urethral tumor. In her histopathologic report we found the tumor cells were arranged in small clusters and single cells were scattered among extracellular mucin and signet ring cell picture, which is consistent with mucionous adenocarcinoma. We then performed partial urethrectomy with negative surgical resection, but the tumor reappeared 18 months later with no symptoms. The patient then decided to undergo radiotherapy for 33 sessions. From a recent MRI follow up the patient remains recurrence free. Conclusions: Early surgical treatment with or without adjuvant radiotherapy appears to be the best option in cases of small, organ-confined disease of urethral mucinous adenocarcinoma. Partial urethrectomy can be performed in this type of cases, which can prevent the use of permanent urinary catheters and further improve the patient's quality of life.

Maxillary Mucinous Adenocarcinoma Mimicking a Lesion of Endodontic Origin: A Rare Case Report

Periapical lesions of endodontic origin are fairly common in the oral cavity in association with tooth pulp infection. Most of these lesions will resolve with adequate root canal treatment and rarely cause suspicion of more insidious disease. Most clinicians tend to skip histopathological examination in cases where the lesion is excised or curetted. We present a rare case of mucinous adenocarcinoma in association an endodontically treated maxillary discoloured central incisor in a 38 year old patient with a history of root canal treatment about 15 years ago. Root canal re-treatment and wide excision was performed. Histology showed epithelial islands suggestive of a neoplasm. Immunohistochemistry was positive for CK7 and S100. Metastasis was ruled out and no evidence of recurrence has been noted in the 12-month follow up period. It is emphasized that any tissue removed from the surgical site should be analysed microscopically. (EEJ-2022-01-013).

Metastasis of mucinous adenocarcinoma of colon to the mandible: A case report

Metastatic disease to the oral cavity is rare, representing only 1-8% of oral malignancies, and involvement of the mandibular ramus is even less prevalent. This report is a unique case of metastatic adenocarcinoma of the colorectal to the mandible. Clinical presentation can be quite variable, and most often a primary malignancy is already known. Jawbone metastasis are a sign of disseminated malignant neoplasms, with poor prognosis and usually an indication for palliative therapy. The requirement for arrival at an appropriate and prompt diagnosis is crucial for determining the most appropriate treatment regimens and improved outcomes. The oral metastatic lesion may be the first indication of an undiscovered distant primary tumor, making timely evaluation and treatment critical from an oncologic perspective. Here we report a known case of mucinous adenocarcinoma of colon who was referred due to a mandibular lesion.

EP-138 Pseudomyxoma peritoni induced by appendiceal mucinous adenocarcinoma- a case report

Abstract Introduction Appendiceal tumours are rare and mucinous tumours account for 58% of the malignant tumours of appendix according to SEER data base, with remaining being carcinoid tumors. Mucinous tumours of appendix have a potential of peritoneal spread in the form of gelatinous material, resulting in pseudomyxoma peritoni (PMP). We report a case of mucinous adenocarcinoma of appendix inducing pseudomyxoma peritoni in a 37 year old male. Case summary A 37 year old male presented with generalised abdominal pain for 2 months and gradually increasing abdominal distension over a period of one month. On examination, abdomen was tense, distended and mildly tender. Rest of systemic examination was unremarkable. Biochemical investigations revealed normal blood complete picture. AST was mildly raised. ALP was 330 (normal upto 130 U/L. Bilirubin, total proteins and renal function tests were within normal limits. CECT abdomen and pelvis showed omental caking and moderate ascites with no overt bowel mass lesion. Diagnostic laparoscopy was done which showed extensive mucinous deposits over peritoneum. Biopsy was taken which revealed metastatic mucinous adenocarcinoma with appendix as primary organ of origin on immunohistochemistry (CK 7 -/CK 20 +, CDX 2 positive). CEA levels were done which were 220 ng/ml (normal upto 10 ng/ml). Patient was referred to oncology centre for further management. Discussion PMP occurs in 7th decade of life and more common in females with a M: F ratio of 1:4 and is almost always of appendiceal in origin. Conclusion PMP is rare tumour with negligible incidence in younger population.

Synchronous Mucinous Carcinomas of Ovary and Appendix: A Case Report With Diagnostic Pitfalls and Review of Corresponding Literature

Background Diagnosis of the primary ovarian mucinous neoplasms occasionally poses a challenge because historically most tumors diagnosed as primary ovarian were documented as metastases from gastrointestinal and pancreatobiliary tracts. This challenge is attributed to the overlapping histologic features, the gray zone, between primary and metastatic mucinous neoplasms in the ovary. While presentation of both primary and metastatic mucinous tumors manifests by the presence of an ovarian mass, determination of the site of origin is clinically significant, because most treatment guidelines are based on the tissue of origin. Case Presentation We present an unusual case of mucinous adenocarcinoma of the ovary and the appendix with diagnostic pitfalls and challenges of immunohistochemical profile. Conclusion Utilization of molecular analysis in challenging cases of ovarian neoplasms helps to narrow down the gray zone and lessens the misdiagnosis of primary ovarian mucinous tumors.

Clinicopathological analysis and surgical strategy of primary appendiceal neoplasms

Objective: To investigate the clinicopathological features, surgical methods and prognosis of primary appendiceal neoplasms. Methods: A descriptive case series study was performed. Clinical data of patients diagnosed with primary appendiceal neoplasms in Peking University First Hospital from 2006 to 2017 were retrospectively analyzed. Patients who underwent surgery and were confirmed as appendiceal neoplasms by postoperative pathology were included. Cases of cecal tumor invading the appendix and other organ tumors implanting in the appendix and cases of recurrent appendix tumors were excluded Pathological classification was based on the 4th edition of the WHO classification of digestive tract tumors (2010 edition), and the efficacy of operation methods of low grade appendiceal mucinous neoplasm (LAMN) were analyzed. Results: A total of 115 patients were enrolled, including 52 males and 63 females with a median age of 59 (51, 71) years. Clinical symptoms usually manifested as dormant pain in the right lower quadrant, migrating right lower abdominal pain, fever and bloating. Twenty-four cases were accidentally discovered during surgery, and 21 cases were found by physical examination. The preoperative diagnosis rate of CT and ultrasound was 40.2% (43/107) and 25.5% (24/94) respectively. The postoperative pathological types contained 83 cases of LAMN, 12 cases of mucinous adenocarcinoma, 9 cases of appendiceal neuroendocrine neoplasms (aNEN), 2 cases of mucinous adenocarcinoma with signet ring cells, 3 cases of serrated adenoma, 2 cases of goblet cell carcinoid, 2 cases of lymphoma, 1 case of leiomyoma and 1 case of schwannomas. All the patients underwent surgical resection, including 41 cases of appendectomy, 21 cases of partial cecectomy, 48 cases of right hemicolectomy, and 5 cases of combined organ resection due to appendiceal tumor infiltration or dissemination. Eighteen cases were diagnosed with pseudomyxoma peritonei (PMP) during operation. A total of 98 patients were enrolled for follow-up. The median follow-up time was 58 (5-172) months. The 5-year disease-free survival (DFS) rate was 84.5% and 5-year overall survival (OS) was 88.2%. Multivariate analysis revealed that high-grade malignancy tumors (HR=25.881, 95% CI: 2.827-236.935, P=0.004) and PMP formation (HR=42.166, 95% CI: 3.470-512.439,P=0.003) were independent risk factors for prognosis. Patients undergoing right hemicolectomy presented longer operation time, more blood loss and higher morbidity of complication as compared to those undergoing appendectomy and partial cecectomy (all P<0.05), while no significant differences in 5-year DFS (P=0.627) and 5-year OS (P=0.718) were found. Conclusions: Primary appendiceal neoplasms usually have no typical features, accompanied with low preoperative diagnosis rate. The common pathological types are LAMN, mucinous adenocarcinoma and aNEN. Appendectomy or partial cecectomy for LAMN may achieve satisfactory prognosis. High-grade malignancy tumors and PMP formation are independent risk factors for prognosis.

EP.TH.515A Case of mucinous adenocarcinoma of the breast in a young male patient presenting with a subcutaneous axillary lump

Abstract Aims Mucinous adenocarcinoma of the breast is rarely encountered clinically, and makes up only 0.01% of Breast cancer (BC) cases and &amp;lt; 1% of male breast cancer (MBC). We describe an extremely rare case of mucinous carcinoma in accessory axillary breast tissue in a male. Case details A 48-year old male presented with a subcutaneous lump in his left axilla. Ultrasound described a 30mm hypoechoic mass and core biopsy confirmed mucinous adenocarcinoma, strongly positive for oestrogen and progesterone receptors, HER2 negative. A solitary enlarged axillary node in was sampled (C2) and mammogram reported a 32mm spiculate mass (M4) on the left. PET scan showed uptake only in the known axillary mass. Management Wide Local Excision and Sentinel Lymph Node Biopsy (SLNB) was completed. Histology showed a 27 mm grade 2 mucinous carcinoma, and the patient completed adjuvant radiotherapy and was commenced on tamoxifen. Conclusions MBC is rare, and accounts for only 1% of all BC. Men tend to be diagnosed at an older age (mean is 67 years) and usually have genetic/hormonal risk factors. Histologically, invasive ductal carcinoma makes up 95% of MBC. In every regard therefore, our case breaks the mold since, he was young, had no genetic/family history and no background of gynaecomastia (present in 6-38%). Literature review suggests that this is only the second case of its kind and from it we can learn to be vigilant for MBC in accessory axillary breast tissue as well as the more typical presentations.

Clinical analysis of 9 cases of a novel stent assisted intestinal bypass for preventing anastomotic leakage in laparoscopic assisted radical resection of rectal cancer

Objective: To examine the safety and effectiveness of a novel stent assisted intestinal bypass for preventing anastomotic leakage in laparoscopic assisted radical resection of rectal cancer. Methods: The clinical data of 9 patients with rectal cancer who underwent laparoscopic radical resection and stent assisted intestinal bypass from September 2019 to June 2020 at the Department of Anus & Intestine Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University were retrospectively analyzed. There were 6 males and 3 females, aged (62.1±6.8) years (range: 53 to 75 years), underwent laparoscopic assisted radical resection of rectal cancer and stent assisted intestinal bypass. A degradable diverting stent was placed at the end of the ileum, and a drainage tube was placed at the proximal end of the stent to bypass the intestinal contents. After operation, the patients were given a diet with less residue. From the 14th day after operation, abdomen X-ray films were taken every 5 to 7 days to observe the destination of the stent dynamically. When the stent was observed to be disintegrated into pieces, the drainage tube was clamped for 3 days to observe any side effects before the tube was removed. The operation time, the time of removing the bypass tube and the total hospital stay were recorded. Results: Laparoscopic assisted radical resection of rectal cancer and stent assisted intestinal bypass were successfully performed in all patients. The operation time was (230.4±48.0) minutes (range: 150 to 318 minutes), and the time of removing shunt tube was (28.8±4.6) days (range: 22 to 34 days). The duration of hospitalization was (21.0±8.6) days (range: 9 to 34 days). Postoperative pathological examination showed 7 cases of moderately differentiated adenocarcinoma, 1 case of moderately well differentiated adenocarcinoma and 1 case of mucinous adenocarcinoma. There were 2 cases of T1, 4 cases of T2 and 3 cases of T3. The number of lymph node dissection was 13.4±3.5 (range: 6 to 18), 3 cases were positive and 6 cases were negative. The post-operation follow-up time was 6 to 16 months, no anastomotic leakage or stenosis was found. Conclusion: Stent assisted intestinal bypass for the prevention of anastomotic leakage in laparoscopic assisted radical resection of rectal cancer is safe and feasible, and shows good short-term effect.

The expression of THOX2 in colorectal mucinous adenocarcinoma and its relationship with prognosis.

e15529 Background: The role of THOX2 in the occurrence and development of tumors has gradually attracted attention, but there is no study on the expression and function of THOX2 in colorectal mucinous adenocarcinoma (MC). The purpose of this study was to investigate the expression of thyroid oxidase 2 (THOX2) in colorectal MC and its relationship with prognosis. Methods: 30 patients with colorectal adenocarcinoma (AC) and 15 patients with MC were selected from The Fourth hospital of Hebei Medical University from October 1, 2018 to July 1, 2019. They were selected to detect the mRNA and protein levels of THOX2 in the colorectal cancer tissues of the two different pathological types using qRT-PCR and immunohistochemistry (IHC) methods. A total of 109 patients with MC who received surgical treatment between January 1, 2015 and January 1, 2015 were selected. The clinicopathological parameters of the patients were collected and survival follow-up was performed. The expression of THOX2 protein in MC tissues was detected by IHC test, and the differences in the expression of THOX2 protein in different tissues were analyzed by χ2 test. Cox univariate and multivariate analyses were used to investigate the relationship between clinicopathological characteristics, THOX2 protein expression level and DFS and OS in patients with MC. Results: The levels of THOX2 mRNA and protein in 15 cases of MC were significantly higher than those in 30 cases of AC. The high expression of THOX2 protein in MC tissues was closely correlated with tumor site, whether mixed with other pathological types, TNM stage, lymph node metastasis, M stage, and liver metastasis, peritoneal metastasis and other site metastasis occurred in patients after initial treatment. Cox regression analysis of 95 patients' survival data showed that high expression of THOX2, right colon and lymph node metastasis were influential factors for DFS in MC patients, and were independent prognostic factors for predicting DFS in MC patients. The expression of THOX2, lymph node metastasis, liver metastasis after adjuvant therapy and peritoneal metastasis are the influencing factors of OS in MC patients. Lymph node metastasis is an independent prognostic factor for OS in MC patients. Conclusions: The expression of THOX2 in MC was significantly higher than that of AC, and it was related to the malignant biological manifestations of tumor. At the same time, the high expression of THOX2 is associated with short DFS and OS in patients with MC, and may be used as a potential biomarker and efficacy predictor for MC patients.

P090. A case of mucinous adenocarcinoma of the breast in a young male patient presenting with a subcutaneous axillary lump

Introduction: Mucinous adenocarcinoma of the breast is rarely encountered clinically, making up only 0.01% of Breast cancer (BC) cases. We describe an extremely rare male case of mucinous carcinoma in accessory axillary breast tissue.

Mucinous Adenocarcinoma of the Appendix With Histologic Response to Neoadjuvant Chemotherapy: Review of Histologic and Clinical Spectrum of Epithelial Neoplastic Mucinous Lesions of the Appendix.

Appendiceal mucinous neoplasms are a rare and heterogeneous group of diseases with challenging clinical management decisions. They account for less than 1% of all cancers but their incidence is on the rise. Treatment is based on their stage and histology. Appendiceal neoplasms frequently metastasize inside the abdomen; this leads to tumor cell growth in the abdominal cavity, known as peritoneal carcinomatosis, and buildup of mucinous material, known as pseudomyxoma peritonei. While low-grade, early-stage tumors can be effectively treated with limited surgical resection, patients with low-grade, advanced-stage disease require peritoneal debulking and hyperthermic intraperitoneal chemotherapy. Therapeutic options for high-grade, advanced-stage mucinous tumors of the appendix have not been well established. Debulking surgery with hyperthermic intraperitoneal chemotherapy preceded and/or followed by systemic chemotherapy has been utilized based on some prospective but not randomized data. We present a case of mucinous adenocarcinoma of the appendix treated with neoadjuvant chemotherapy followed by cytoreductive surgery/hyperthermic intraperitoneal chemotherapy and adjuvant chemotherapy. Preoperative chemotherapy provided a favorable histologic response by converting initial mucinous appendiceal adenocarcinoma histology to a high-grade mucinous appendiceal neoplasm.

A rare case report of mucinous adenocarcinoma arising in sacrococcygeal teratoma in an adult patient and brief review

Sacrococcygeal teratoma is the most common congenital tumor with relatively uncommon incidence in adult population. Somatic malignancy arising in sacrococcygeal teratoma is a rare phenomena arising in long standing cases. Association with mucinous adenocarcinoma is extremely rare with only few case reports in the published literature. We herein report a case of mucinous adenocarcinoma arising in a background of sacrococcygeal teratoma with emphasis on the clinico pathological profile and post operative management of such cases. Somatic malignancy such as Mucinous adenocarcinoma are rarely associated with Sacrococcygeal teratoma. Adequate histopathologic sampling and microscopy is essential to clinch the diagnosis for post operative management of these patients which subsequently have a tremendous impact on patient outcome.

MUCINOUS ADENOCARCINOMA OF GALL BLADDER: A RARE ENTITY IN GALL BALDDER ADENOCARCINOMA

Gall bladder carcinoma is the most common type of tumor of the biliary tract and adenocarcinoma is the major histopathological subtype. Mucinous variant is a rare subtype and mucinous carcinoma accompanied with signet ring is extremely rare. When mucinous component exceeds 90% of the tumor, it is labeled as pure mucinous carcinoma. Immunohistochemistry helps to distinguish primary mucinous adenocarcinoma of gall bladder from pseudo myxoma peritonei from appendiceal neoplasm. Mucinous carcinoma is CK 7 positive and CK20 negative. We report a case of mucinous adenocarcinoma arising from the fundus of the gall bladder.&#x0D; Keywords: Mucinous carcinoma, Gall bladder, Adenocarcinoma, Metastatic deposits

Mucinous Adenocarcinoma as a High-risk Factor in Stage II Colorectal Cancer: A Propensity Score-matched Study from Japan.

The purpose of this study was to investigate the clinical, pathological, and prognostic differences between adenocarcinoma (ADC) and mucinous adenocarcinoma (MUC) in colorectal cancer (CRC). This was a retrospective study of a Japanese high-volume cancer Center over a 10-year period. From April 2007 to December 2016, a total of 3,296 patients with primary CRC were included in the study. The clinical characteristics of MUC and ADC were compared. Then, propensity score matching was performed according to a 1:2 ratio. Multivariate analysis was used for independent risk factors related to prognosis. The overall survival (OS) and disease-free survival (DFS) of 126 cases of MUC and 256 cases of ADC were studied, as well as the survival rate of each stage. MUC accounts for 3.82% of the total CRC. Compared to ADC, MUC is more common in female patients (47.62% vs. 38.77%; p=0.045), with higher carcinoembryonic antigen levels (56.35% vs. 34.95%; p<0.001), more ulcerative and infiltrative types (82.54% vs. 72.93%; p=0.016), higher incidence of perineural infiltration (51.59% vs. 41.04%; p=0.018), deeper infiltration (T3-T4: 90.48% vs. 65.84%; p<0.001), and more advanced cancer (stage III-IV: 59.52% vs. 44.79%; p=0.001). MUC is also more likely to recur (24.6% vs. 14.32%; p=0.001). Regarding the long-term survival rate, the OS (p<0.001) and DFS (p=0.05) is consequently worse. After propensity score matching, multivariate analysis showed that MUC was a common independent risk factor for DFS [odds ratio (OR)=4.277; 95% confidence interval (CI), 0.327-0.97; p=0.039], and also for OS (OR= 6.836; 95% CI, 0.274-0.831; p=0.009). In MUC, OS and DFS were still relatively worse (OS: p=0.017; DFS: p=0.038). However, only significant statistical differences were shown in stage II (OS: p=0.003; DFS: p=0.007). No significant differences were noted in the stages I, III, or IV. MUC is a high-risk factor for stage II CRC. Adjuvant chemotherapy should be routinely recommended for patients with MUC stage II, and special attention should be paid during their follow-up.