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Pseudomyxoma Peritonei

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https://www.readbyqxmd.com/read/28640835/bilateral-blockade-of-mek-and-pi3k-mediated-pathways-downstream-of-mutant-kras-as-a-treatment-approach-for-peritoneal-mucinous-malignancies
#1
Murali R Kuracha, Peter Thomas, Brian W Loggie, Venkatesh Govindarajan
Mucinous colorectal adenocarcinomas (MCAs) are clinically and morphologically distinct from nonmucinous colorectal cancers (CRCs), show a distinct spectrum of genetic alterations (higher KRAS mutations, lower p53, high MUC2), exhibit more aggressive behavior (more prone to peritoneal dissemination and lymph node involvement) and are associated with poorer response to chemotherapy with limited treatment options. Here, we report the effectiveness of combinatorial targeting of two KRAS-mediated parallel pathways in reducing MUC2 production and mucinous tumor growth in vitro and in vivo...
2017: PloS One
https://www.readbyqxmd.com/read/28618350/minimally-invasive-appendectomy-for-resection-of-appendiceal-mucocele-case-series-and-review-of-the-literature
#2
Sonia T Orcutt, Daniel A Anaya, Mokenge Malafa
INTRODUCTION: Appendiceal mucoceles encompass neoplastic and non-neoplastic causes of a distended Appendix filled with mucus. Appendectomy is recommended when an appendiceal mucocele is identified, incidentally or otherwise, in the event it is secondary to a malignancy. For an intact mucocele, it is critically important to avoid rupturing the mucocele during resection, as rupture of a neoplastic mucocele can result in pseudomyxoma peritonei, or mucin deposits in the peritoneum, which is associated with long-term morbidity and mortality...
May 29, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28599482/an-unusual-case-of-pseudomyxoma-peritonei-associated-with-synchronous-primary-mucinous-tumors-of-the-ovary-and-appendix-a-case-report
#3
Dong Soo Suh, Yong Jung Song, Byung Su Kwon, Sul Lee, Nam Kyung Lee, Kyung Un Choi, Ki Hyung Kim
Pseudomyxoma peritonei (PMP) is a rare disease that usually originates from mucinous neoplasms of the appendix and, less commonly, from extra-appendiceal tumors, but it may also be caused by synchronous primary mucinous tumors of the ovary and appendix. The current study discusses the case of a 73-year-old female who presented with progressively worsening indigestion and abdominal distension. Magnetic resonance imaging of the pelvis revealed a large cystic mass with a thin enhancing septa arising from the right ovary and ascites with scalloping of the liver surface...
June 2017: Oncology Letters
https://www.readbyqxmd.com/read/28598731/neoplasms-of-the-appendix-pictorial-review-with-clinical-and-pathologic-correlation
#4
Laura M Leonards, Anokh Pahwa, Maitraya K Patel, Jeffrey Petersen, Michael J Nguyen, Cecilia M Jude
Appendiceal neoplasms are uncommon tumors of the gastrointestinal tract that may manifest with symptoms of appendicitis, right lower quadrant pain, or palpable mass, leading to imaging or surgical intervention. The majority of appendiceal masses consist of primary epithelial neoplasms and neuroendocrine tumors (NETs). Epithelial neoplasms-mucinous and nonmucinous types-are more often detected at imaging than NETs due to their larger size and propensity for peritoneal spread and metastatic disease. Epithelial mucinous neoplasms are defined by the presence of mucin, detected at radiologic and pathologic examination...
June 9, 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28591173/overinterpretation-is-common-in-pathological-diagnosis-of-appendix-cancer-during-patient-referral-for-oncologic-care
#5
Mark A Valasek, Irene Thung, Esha Gollapalle, Alexey A Hodkoff, Kaitlyn J Kelly, Joel M Baumgartner, Vera Vavinskaya, Grace Y Lin, Ann P Tipps, Mojgan V Hosseini, Andrew M Lowy
CONTEXT: Low-grade appendiceal mucinous neoplasm (LAMN) and appendiceal adenocarcinoma are known to cause the majority of pseudomyxoma peritonei (PMP, i.e. mucinous ascites); however, recognition and proper classification of these neoplasms can be difficult despite established diagnostic criteria. OBJECTIVE: To determine the pathological diagnostic concordance for appendix neoplasia and related lesions during patient referral to an academic medical center specialized in treating patients with PMP...
2017: PloS One
https://www.readbyqxmd.com/read/28587731/prediction-of-clinical-outcome-using-blood-flow-volume-in-the-superior-mesenteric-artery-in-patients-with-pseudomyxoma-peritonei-treated-by-cytoreductive-surgery
#6
A Dohan, M Barral, C Eveno, R Lo Dico, R Kaci, A Pasteur-Rousseau, P Soyer, M Pocard, P Bonnin
BACKGROUND: Pseudomyxoma peritonei (PMP) is a rare carcinomatosis limited to the peritoneal cavity, mainly supplied by the superior mesenteric artery (SMA). The only curative treatment is cytoreductive surgery (CRS) associated with hyperthermic intraperitoneal chemotherapy. This study aimed to evaluate the ability of blood flow volume (BFV) recorded in the SMA using Doppler ultrasonography pre-operatively to predict the extent and resectability of the disease and post-operatively to assess clinical outcome...
May 25, 2017: European Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28560703/allogenic-blood-transfusion-is-an-independent-predictor-of-poorer-peri-operative-outcomes-and-reduced-long-term-survival-after-cytoreductive-surgery-and-hyperthermic-intraperitoneal-chemotherapy-a-review-of-936-cases
#7
Akshat Saxena, Sarah J Valle, Winston Liauw, David L Morris
INTRODUCTION: There is a paucity of data on the impact of allogenic blood transfusion (ABT) on morbidity and survival outcomes after cytoreductive surgery and hyperthermic intraperitoneal chemotherapy (CRS/HIPEC). METHODS: Nine hundred and thirty-five consecutive CRS/HIPEC procedures were performed between 1996 and 2016 at a high-volume institution in Sydney, Australia. Of these, 337(36%) patients required massive ABT (MABT) (≥5 units). Peri-operative complications were graded according to the Clavien-Dindo classification...
May 30, 2017: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/28549831/adenocarcinoma-of-the-appendix-with-extra-appendicular-spread-clinico-surgical-and-histologic-analysis-of-27-cases
#8
Francisco J Morera Ocón, Bruno Camps Vilata, Elena Muñoz Forner, Clara Navarro Campoy, Javier Gallego Plazas, Samuel Navarro Fos
BACKGROUND AND OBJECTIVES: Appendiceal neoplasms with extra-appendiceal spread may show different clinical patterns with pseudomyxoma peritonei (PMP) being one of them. We analyse the results in a series of patients treated in our centre. MATERIAL AND METHODS: Retrospective study of patients operated on for appendiceal peritoneal carcinomatosis from January 2012 to May 2015. RESULTS: Twenty-seven consecutive patients were included. Median age 63 years (26-73); 14 were men...
May 23, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/28540829/pseudomyxoma-peritonei-natural-history-and-treatment
#9
Rohin Mittal, Anuradha Chandramohan, Brendan Moran
Pseudomyxoma peritonei (PMP) is an uncommon disease characterized by mucinous ascites, classically originating from a ruptured low grade mucinous neoplasm of the appendix. The natural history of PMP revolves around the "redistribution phenomenon", whereby mucinous tumour cells accumulate at specific sites with relative sparing of the motile small bowel and to a lesser extent other parts of the gastrointestinal tract. Peritoneal tumour accumulates due to gravity and at the sites of peritoneal fluid absorption, namely, the greater and lesser omentum and the under-surface of the diaphragm, particularly on the right...
March 29, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28540827/complete-cytoreductive-surgery-plus-hipec-for-peritoneal-metastases-from-unusual-cancer-sites-of-origin-results-from-a-worldwide-analysis-issue-of-the-peritoneal-surface-oncology-group-international-psogi
#10
Diane Goéré, Guillaume Passot, Maximiliano Gelli, Edward A Levine, David L Bartlett, Paul H Sugarbaker, Olivier Glehen
AIM: The aim of this study was to assess the outcomes of patients operated on for peritoneal metastases from unusual cancer sites of origin, meaning apart from PM from colorectal, gastric and epithelial ovarian carcinomas, pseudomyxoma peritonei and mesothelioma. PATIENTS AND METHODS: A questionnaire concerning patients treated with CRS plus HIPEC for PM arising from unusual cancer sites of origin was sent to all centers that routinely performed HIPEC, through the Peritoneal Surface Oncology Group International and the RENAPE network...
March 8, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28540781/haemodynamic-changes-during-hyperthermic-intra-thoracic-chemotherapy-for-pseudomyxoma-peritonei
#11
Nina Ashraf-Kashani, John Bell
PURPOSE: Hyperthermic intra-thoracic chemotherapy (HITOC) combined with cytoreductive surgery (CRS) is a novel approach in the management of pseuodmyxoma peritonei with thoracic extension. The haemodynamic effects of hyperthermic chemotherapy present an anaesthetic challenge. Here, we describe the haemodynamic changes seen during HITOC. MATERIALS AND METHODS: A retrospective case note review of adult patients undergoing CRS with HITOC from 2009 to 2016. Intra-operative haemodynamics were measured using the LIDCOrapid(TM) brand of invasive cardiac output (CO) monitor...
March 19, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28526814/kras-and-gnas-co-mutation-in-metastatic-low-grade-appendiceal-mucinous-neoplasm-lamn-to-the-ovaries-a-practical-role-for-next-generation-sequencing
#12
Daniel R Matson, Jin Xu, Laura Huffman, Lisa Barroilhet, Molly Accola, William M Rehrauer, Paul Weisman
BACKGROUND Low-grade appendiceal mucinous neoplasms (LAMNs) are cytologically low-grade tumors of the appendix and are a frequent cause of pseudomyxoma peritonei. They can become a diagnostic challenge when they metastasize to the ovaries, where they may mimic primary ovarian mucinous tumors. CASE REPORT We report the case of a patient with very large bilateral ovarian mucinous tumors and a concurrent minute LAMN incidentally discovered in a grossly normal appendix. A primary ovarian tumor was suspected, but histological analysis of the ovaries suggested an appendiceal origin...
May 20, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28474197/computed-tomography-follow-up-assessment-of-patients-with-low-grade-appendiceal-mucinous-neoplasms-evaluation-of-risk-for-pseudomyxoma-peritonei
#13
Catarina Tiselius, Csaba Kindler, Jayant Shetye, Henry Letocha, Kenneth Smedh
BACKGROUND: Low-grade appendiceal mucinous neoplasms are rare. Both classification and management vary. This study aimed to follow up on patients with a diagnosis of LAMN after primary surgery with computer tomography (CT) scans to examine the risk for the development of pseudomyxoma peritonei (PMP). METHODS: This population-based prospective study investigated patients who underwent appendectomy between 2007 and 2013 and had histology results demonstrating the presence of LAMN...
May 4, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/28449607/adenocarcinoma-ex-goblet-cell-carcinoid-of-the-appendix-with-metastatic-peritoneal-spread-to-meckel-s-diverticulum-and-endometriosis
#14
Brett Matthew Lowenthal, Grace Y Lin, Ann M Ponsford Tipps, Mojgan Hosseini
Adenocarcinoma ex-goblet cell carcinoid is a very rare and histologically unique appendiceal malignancy with dual glandular and neuroendocrine differentiation. There is a high incidence of this tumor among middle-aged women with metastasis to the gynecologic tract with the mode of metastasis following peritoneal spread rather than hematogenous distribution. Adenocarcinoma ex-goblet cell carcinoid can spread to any peritoneal site including ovaries or omentum. We report a 37-year-old healthy woman who initially presented with right lower quadrant abdominal pain and pseudomyxoma peritonei...
April 1, 2017: International Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28449606/pseudomyxoma-peritonei-as-a-first-manifestation-of-kras-mutated-urachal-mucinous-cystadenocarcinoma-of-the-bladder-a-case-report
#15
Ksenya V Shelekhova, Alexander S Zhuravlev, Daria D Krylova, Alexey S Konstantinov, Lidia V Shtan, Valeriia A Kheinshtein
Only 28 cases of pseudomyxoma peritonei (PMP) arising from urachal neoplasms have been reported. We report one example of this extremely rare disease with KRAS mutational status in its spectrum of pathology. A 45-year-old woman presented with urachal frankly invasive mucinous cystadenocarcinoma confined to the dome of the bladder, which clinically manifested as PMP and was not detected at the first surgery. The primary tumour was revealed 6 months later because of its recurrence as PMP. Microscopic investigation revealed tubular adenoma and cystadenocarcinoma communicating with the bladder lumen and transitioning from the urachal urothelium to the mucinous epithelium...
April 1, 2017: International Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28429952/rare-cases-imitating-acute-appendicitis-three-case-reports-and-a-review-of-literature
#16
L Kunovsky, Z Kala, L Mitas, V Can, J Dolina, E Nemcová, L Klvacova, T Gajdosova, I Penka
Acute appendicitis with its characteristic clinical course is one of the most common diagnoses that require urgent surgery. The following three case reports present patients with symptoms typical of acute appendicitis which was, however, not confirmed intraoperatively. Preoperative CT or MRI were not requested because symptoms clearly indicated acute appendicitis. The first case describes a male patient with right-sided diverticulitis, the second case report involves a pregnant woman in 33rd week of gestation with right adnexal torsion due to a dermoid cyst, and in the last report, a case of spontaneous perforation of appendiceal mucinous neoplasm is presented...
2017: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://www.readbyqxmd.com/read/28426742/multiple-components-of-pka-and-tgf-%C3%AE-pathways-are-mutated-in-pseudomyxoma-peritonei
#17
Lilli Saarinen, Pirjo Nummela, Alexandra Thiel, Rainer Lehtonen, Petrus Järvinen, Heikki Järvinen, Lauri A Aaltonen, Anna Lepistö, Sampsa Hautaniemi, Ari Ristimäki
Pseudomyxoma peritonei (PMP) is a subtype of mucinous adenocarcinoma mainly restricted to the peritoneal cavity and most commonly originating from the appendix. The genetic background of PMP is poorly understood and no targeted treatments are currently available for this fatal disease. While RAS signaling pathway is affected in most if not all PMP cases and over half of them also have a mutation in the GNAS gene, other genetic alterations and affected pathways are, to a large degree, poorly known. In this study, we sequenced whole coding genome of nine PMP tumors and paired normal tissues in order to identify additional, commonly mutated genes and signaling pathways affected in PMP...
2017: PloS One
https://www.readbyqxmd.com/read/28388871/repeat-extraperitoneal-cesarean-section-on-a-woman-with-pseudomyxoma-peritonei
#18
Debjani Mukhopadhyay, Ruta Gada, Barnaby Rufford
No abstract text is available yet for this article.
April 2017: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28365962/outcomes-of-cytoreductive-surgery-and-hipec-for-pseudomyxoma-peritonei-of-appendiceal-origin-from-two-indian-centers-a-preliminary-five-year-experience
#19
Aditi Bhatt, Deepak Sheshadri, Garud Chandan, Veena Ramaswamy, Jeegeshwar Pandey, Nitin Bhorkar, Deepesh Agrawal, Sanket Mehta
PURPOSE: To evaluate the short-term outcomes of patients of pseudomyxoma peritonei (PMP) of appendiceal origin treated with cytoreductive surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC) at two tertiary Indian centers. METHODS: Data was prospectively collected from January 2011 to January 2016. Palliative procedures were excluded. HIPEC was performed by the coliseum technique using either a mitomycin or oxaliplatin-based regimen. RESULTS: 77 procedures were performed on 71 patients...
January 2017: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/28357060/visceral-scalloping-on-abdominal-computed-tomography-due-to-abdominal-tuberculosis
#20
Vishal Sharma, Anmol Bhatia, Sarthak Malik, Navjeet Singh, Surinder S Rana
OBJECTIVE: Scalloping of visceral organs is described in pseudomyxoma peritonei, malignant ascites, among other conditions, but not tuberculosis. METHODS: We report findings from a retrospective study of patients with abdominal tuberculosis who had visceral scalloping on abdominal computed tomography (CT). Diagnosis of abdominal tuberculosis was made on the basis of combination of clinical, biochemical, radiological and microbiological criteria. The clinical data, hematological and biochemical parameters, and findings of chest X-ray, CT, Mantoux test, and HIV serology were recorded...
January 2017: Therapeutic Advances in Infectious Disease
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