scholarly journals Aetiology and Pathogenesis of Cutaneous Melanoma: Current Concepts and Advances

2021 ◽  
Vol 22 (12) ◽  
pp. 6395
Author(s):  
Strahil Strashilov ◽  
Angel Yordanov
Keyword(s):  
New Zealand ◽  
Gastrointestinal Tract ◽  
Mortality Rate ◽  
Cutaneous Melanoma ◽  
Basal Layer ◽  
Mucosal Melanoma ◽  
Morbidity Rate ◽  
Urinary System ◽  
Malignant Transformations ◽  
Skin Epidermis

Melanoma develops from malignant transformations of the pigment-producing melanocytes. If located in the basal layer of the skin epidermis, melanoma is referred to as cutaneous, which is more frequent. However, as melanocytes are be found in the eyes, ears, gastrointestinal tract, genitalia, urinary system, and meninges, cases of mucosal melanoma or other types (e.g., ocular) may occur. The incidence and morbidity of cutaneous melanoma (cM) are constantly increasing worldwide. Australia and New Zealand are world leaders in this regard with a morbidity rate of 54/100,000 and a mortality rate of 5.6/100,000 for 2015. The aim of this review is to consolidate and present the data related to the aetiology and pathogenesis of cutaneous melanoma, thus rendering them easier to understand. In this article we will discuss these problems and the possible impacts on treatment for this disease.

Pylorus-Preserving Pancreaticoduodenectomy: Evaluation of 50 Cases

2017 ◽  
Vol 13 (1) ◽  
pp. 42-45
Author(s):  
SM Shakhwat Hossain ◽  
Ferdous Rahman
Keyword(s):  
Gastric Emptying ◽  
Mortality Rate ◽  
Wound Infection ◽  
Postoperative Mortality ◽  
Operation Time ◽  
Armed Forces ◽  
Military Hospital ◽  
Morbidity Rate ◽  
Proper Patient Selection ◽  
Periampullary Neoplasms

Introduction: Pancreaticoduodenectomy is the procedure of choice for periampullary neoplasms. It is considered as a major surgical procedure. It is associated with relatively higher postoperative mortality and morbidity rate, however, with development of technology, proper patient selection, meticulous operative technique, appropriate postoperative care, morbidity and mortality rate has decreased subsequently. Up to the 1970s, the operative mortality rate after pancreaticoduodenectomy approached 20% but it has been reduced to less than 5% in recent reports. This study is designed to evaluate the postoperative outcomes of pylorus-preserving pancreaticoduodenectomy procedure in our set up. Objective: To evaluate the outcome of the pylorus-preserving pancreaticoduodenectomy procedure with the intention to measure operation time and per-operative bleeding, observing postoperative anastomotic leakage and gastric emptying time. To find out postoperative wound infection and complications to detect the dumping syndrome. Materials and Methods: A prospective observational study was carried out in the Department of Hepatobiliary Surgery, Combined Military Hospital, Dhaka from July 2013 to January 2017. Fifty patients who underwent pylorus-preserving pancreaticodudenectomy procedure were included in this study. Results: Out of 50 postoperative patients, 12(24%) patients developed complications. Of these patients, 3(6%) developed wound infection, 2(4%) developed bile leakage and 2(4%) developed postoperative haemorrhage. Pancreatic fistula, vomiting, delayed gastric emptying and abdominal collection all were 1(2%) each. Postoperative mortality was 3(6%). Conclusion: The present study demonstrated the development of postoperative complications after pylorus-preserving pancreaticoduodenectomy is as similar as published in different studies. Better outcome can be achieved with meticulous pre-operative evaluation of risk factors and per-operative skill maneuvering. Journal of Armed Forces Medical College Bangladesh Vol.13(1) 2017: 42-45

Open and laparoscopic surgeries are associated with comparable 90 day morbidities and mortalities following ERAS protocols- A retrospective Study. (Preprint)

2020 ◽  
Author(s):  
BHAVIN VASAVADA ◽  
Hardik Patel
Keyword(s):  
Multivariate Analysis ◽  
Retrospective Study ◽  
Mortality Rate ◽  
Operative Time ◽  
Univariate Analysis ◽  
Morbidity And Mortality ◽  
Morbidity Rate ◽  
Blood Products ◽  
Asa Score

UNSTRUCTURED All the gastrointestinal surgeries performed between April 2016 to march 2019 in our institution have been analysed for morbidity and mortality after ERAS protocols and data was collected prospectively. We performed 245 gastrointestinal and hepato-biliary surgeries between April 2016 to march 2019. Mean age of patients was 50.96 years. 135 were open surgeries and 110 were laparoscopic surgeries. Mean ASA score was 2.40, mean operative time was 111 minutes, mean CDC grade of surgery was 2.56. 40 were emergency surgeries and 205 were elective surgeries. Overall 90 days mortality rate was 8.5% and over all morbidity rate was around 9.79% . On univariate analysis morbidity was associated significantly with higher CDC grade of surgeries, higher ASA grade, more operative time, more blood products use, more hospitalstay, open surgeries,HPB surgeries and luminal surgeries(non hpb gastrointestinal surgeries) were associated with higher 90 days morbidity. On multivariate analysis no factors independently predicted morbidity. On univariate analysis 90 days mortality was predicted by grade of surgeries, higher ASA grade, more operative time, more blood products use, open surgeries and emergency surgeries. However on multivariate analysis only more blood products used was independently associated with mortality There is no difference between 90 day mortality and moribidity rates between open and laparoscopic surgeries.

scholarly journals MO13-1 Characteristics of mucosal melanoma in comparison with cutaneous melanoma: Analysis of real-world data

2021 ◽  
Vol 32 ◽  
pp. S304
Author(s):  
Masashi Namba ◽  
Tokumo Kentaro ◽  
Yamauchi Masami ◽  
Okamoto Wataru ◽  
Sugiyama Kazuhiko
Keyword(s):  
Real World ◽  
Cutaneous Melanoma ◽  
Mucosal Melanoma ◽  
Real World Data ◽  
World Data

scholarly journals VIII Russian National Congress "Man and Cure"

2001 ◽  
Vol 82 (5) ◽  
pp. 412-412
Author(s):  
N. B. Amirov
Keyword(s):  
Cardiovascular Diseases ◽  
Mortality Rate ◽  
Russian Population ◽  
Morbidity Rate ◽  
Parasitic Diseases ◽  
Rational Use ◽  
Deputy Minister ◽  
Rational Use Of Medicines ◽  
National Congress ◽  
All Diseases

A. I. Vyalkov, First Deputy Minister of Health, made a plenary report "The System of Rational Use of Medicines in Russia". He noted that in recent years the mortality rate among able-bodied population has increased by 54%. In the period from 1999 to 2000 the Russian population morbidity rate for all diseases was growing, mostly due to cardiovascular diseases, infectious and parasitic diseases, as well as tuberculosis.

scholarly journals Successful Treatment of a Patient with anti-PD1 Antibody-Resistant Advanced Mucosal Melanoma with Nivolumab, Ipilimumab plus Denosumab Combination Therapy

2020 ◽  
Vol 13 (1) ◽  
pp. 271-275 ◽  
Author(s):  
Taku Fujimura ◽  
Yumi Kambayashi ◽  
Kentaro Ohuchi ◽  
Ryo Amagai ◽  
Yota Sato ◽  
...  
Keyword(s):  
Malignant Melanoma ◽  
Combination Therapy ◽  
Nasal Cavity ◽  
Immune Checkpoint ◽  
Cutaneous Melanoma ◽  
Japanese Population ◽  
Immune Checkpoint Inhibitors ◽  
Checkpoint Inhibitors ◽  
Mucosal Melanoma ◽  
Mutation Burden

Since the incidence of mucosal melanoma is higher in the Japanese population compared to Caucasians, and since mucosal melanoma possesses a lower mutation burden compared to cutaneous melanoma, the efficacy of anti-PD1 antibody (Ab) monotherapy for mucosal melanoma is limited. Therefore, other targeting molecules that enhance the anti-tumor effects of immune checkpoint inhibitors are needed. In this report, we present a case with anti-PD1 Ab-resistant recurrent malignant melanoma of the nasal cavity successfully treated with nivolu­mab, ipilimumab plus denosumab combination therapy.

scholarly journals Skin lesions suspicious for melanoma: New Zealand excision margin guidelines in practice

2018 ◽  
Vol 10 (3) ◽  
pp. 210 ◽  
Author(s):  
Tess Brian ◽  
Michael B. Jameson
Keyword(s):  
New Zealand ◽  
Standard Deviation ◽  
Cutaneous Melanoma ◽  
Positive Margin ◽  
Skin Lesions ◽  
Excision Biopsy ◽  
Excision Margin ◽  
Biopsy Specimens ◽  
Deep Margin ◽  
Horizontal Margin

ABSTRACT INTRODUCTION New Zealand guidelines for cutaneous melanoma management recommend excision biopsy specimens of suspected lesions have a 2 mm horizontal margin, and a deep margin into upper subcutis. AIM To assess guideline compliance of suspicious lesion biopsies taken in the community and in a hospital. METHODS Patients admitted to Waikato Hospital, Hamilton, for diagnostic or treatment melanoma surgery during the year ending February 2016 were retrospectively identified, and their demographic and biopsy characteristics examined. RESULTS In total, 140 patients had excision biopsies: 61.4% were performed outside the hospital. Biopsy data were available for 126 specimens. Mean horizontal margin was greater (P = 0.001) in hospital biopsies (4.8 mm, standard deviation (s.d.) 3.7 mm) than biopsies performed elsewhere (2.8 mm; s.d. 1.8 mm). Horizontal margins >2.0 mm occurred in 70.6% of specimens; 21.6% of ≤2.0 mm specimens had a tumour-positive margin. Subsequent wide local excision identified residual melanoma in 9.6% of specimens, which was not associated (P = 0.3) with primary horizontal margin ≤2.0 mm. Mean deep margin of hospital biopsies (6.5 mm; s.d. 2.7 mm) was greater (P < 0.001) than in other biopsies (4.1 mm; s.d. 2.7 mm). Horizontal margin >2.0 mm specimens had greater (P < 0.001) mean deep margin (5.9 mm; s.d. 2.7 mm) than specimens with horizontal margin ≤2.0 mm (mean deep margin 3.3 mm; s.d. 2.7 mm). Deep margin ≤2.0 mm (19.0%) was independently associated with the facility where biopsy was performed (P = 0.001) and horizontal margin (P < 0.001). DISCUSSION The New Zealand biopsy deep margin recommendation does not lend itself to meaningful audit. Compliance with the horizontal margin recommendation was low, but of uncertain clinical significance.

scholarly journals A Review of the Aetiopathogenesis and Clinical and Histopathological Features of Oral Mucosal Melanoma

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Liviu Feller ◽  
Razia A. G. Khammissa ◽  
Johan Lemmer
Keyword(s):  
Malignant Transformation ◽  
Basal Layer ◽  
Mucosal Melanoma ◽  
Microscopical Examination ◽  
Regional Lymph Nodes ◽  
The One ◽  
Immunohistochemical Studies ◽  
Histological Staining ◽  
Multiple Interactions ◽  
Oral Mucosal Melanoma

Oral mucosal melanoma is an uncommon, usually heavily melanin-pigmented, but occasionally amelanotic aggressive tumour with a poor prognosis. Despite radical surgery, radiotherapy, or chemotherapy, local recurrence and distant metastasis are frequent. Microscopical examination is essential for diagnosis, and routine histological staining must be supplemented by immunohistochemical studies. The aetiology is unknown, the pathogenesis is poorly understood, and the 5-year survival rate rarely exceeds 30%. In most cases, oral mucosal melanoma arises from epithelial melanocytes in the basal layer of the epithelium and less frequently from immature melanocytes arrested in the lamina propria. In both cases the melanocytes undergo malignant transformation, invade deeper tissues, and metastasize to regional lymph nodes and to distant sites. Very rarely metastasis from skin melanoma may give rise to oral mucosal melanoma that may be mistaken for primary oral mucosal melanoma. The pathogenesis of oral mucosal melanoma is complex involving multiple interactions between cytogenetic factors including dysregulation of the cKit signalling pathways, cell cycle, apoptosis, and cell-to-cell interactions on the one hand and melanin itself, melanin intermediates, and local microenvironmental agents regulating melanogenesis on the other hand. The detailed mechanisms that initiate the malignant transformation of oral melanocytes and thereafter sustain and promote the process of melanomagenesis are unknown.

scholarly journals Natural infection by Procyrnea uncinipenis (Nematoda, Habronematidae), a parasite from rheas, an autoctone bird from South America, in emus Dromaius novaehollandiae, a ratite from New Zealand

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Nicole Brand Ederli ◽  
Samira Salim Mello Gallo ◽  
Francisco Carlos Rodrigues de Oliveira
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Zealand ◽  
Gastrointestinal Tract ◽  
Natural Infection ◽  
State University ◽  
Dromaius Novaehollandiae ◽  
The City ◽  
Janeiro State ◽  
Scanning Electron

Abstract The present study reports a natural infection of emus, Dromaius novaehollandiae, by the nematode Procyrnea uncinipenis. Five adult emus from a scientific breeding farm at North Fluminense State University located in the city of Campos dos Goytacazes, Rio de Janeiro state, Brazil were necropsied, and their gastrointestinal tract were collected and examined for the presence of parasites from October 2013 to November 2015. Two of the five (40%) emus necropsied were infected with nematodes, and a portion of the nematodes were processed for light microscopy. In addition, two other nematodes (a male and a female) were prepared for scanning electron microscopy. In a female bird, one nematode was collected in the proventriculus and two nematodes in the gizzard and in the male bird four nematodes were collected in the gizzard. The morphological and morphometric analyzes allowed to identify the nematodes as P. uncinipenis, this being the first report of an infection by P. uncinipenis in emus. Therefore, we infer that these emus were naturally infected by nematodes that were considered specific to rheas.

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