Displaying publications 61 - 80 of 130 in total

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  1. Roslida A, Fezah O, Yeong LT
    Asian Pac J Cancer Prev, 2011;12(3):665-9.
    PMID: 21627361
    Ardisia crispa (Family: Myrsinaceae) has been used as a traditional medicine for various ailments. Previous studies showed that Ardisia crispa possesses antimetastatic and anti-inflammatory properties. Nevertheless, research done on the plant is still limited. Therefore, the present study was designed to evaluate the suppression effect of Ardisia crispa root hexane (ACRH) extract on 7, 12-dimethylbenz (α) anthracene (DMBA)-induced mice skin tumor promotion in ICR mice with topical application twice weekly for 10 weeks. Results showed significant difference between treatment groups (mice treated with 30 mg/kg, 100 mg/kg and 300 mg/kg of ACRH extract; denoted as group I, II and III respectively) for tumor incidence and tumor burden (P<0.05). Significant reduction in tumor incidence (20%), tumor burden (1.5 ± 0.50), tumor volume (2.49 ± 1.70) and delayed latency period of tumor formation was observed in group I (30 mg/kg) in comparison to carcinogen control. This study indicates that ACRH extract could be a promising skin tumor promotion suppressing agent at a lower dosage (30 mg/kg). Further studies are required to elucidate the underlying mechanism(s) leading to this effect.
    Matched MeSH terms: Skin Neoplasms/chemically induced; Skin Neoplasms/pathology; Skin Neoplasms/prevention & control*
  2. Al-Naggar RA, Al-Naggar TH, Bobryshev YV
    Asian Pac J Cancer Prev, 2011;12(4):995-9.
    PMID: 21790240
    INTRODUCTION: Malignant melanoma in particular is one of the few remaining cancers with an increasing incidence.

    OBJECTIVES: The objective of this study is to explore the perceptions and opinions of young Malaysians towards skin cancer prevention.

    METHODOLOGY: Focus group discussions were conducted among 33 medical science students from Management and Science University (MSU), Shah Alam, Malaysia, using convenience sampling. Students were divided into 4 focus groups consisting of 8, 8, 9 and 8 students respectively. The facilitator wrote down the conversations and data obtained were classified into various categories and analyzed manually.

    RESULTS: The majority of the participants mentioned that overexposure to ultraviolet light is the commonest cause of skin cancer but also that the most benefit we get from sun ight is vitamin D synthesis. The majority mentioned that the best prevention measure for skin cancer is using a sunscreen, followed by limit exposure to the sun.

    CONCLUSION: The present study demonstrated there is a lack of knowledge regarding screening methods and prevention measures of skin cancer. Therefore, there is a need to establish health education unit in all universities to educate all university students regarding various health problems including skin cancer prevention.
    Matched MeSH terms: Skin Neoplasms/epidemiology*; Skin Neoplasms/prevention & control*; Skin Neoplasms/psychology
  3. Pang EB, Pang KP
    Med J Malaysia, 2015 Jun;70(3):198-9.
    PMID: 26248784
    Melanoma of the ear canal is extremely rare; due to its hidden area, most would present late in their history. We present the first case reported, of a black pigment foreign body mimicking a melanoma in the external auditory canal. A 14 year old Chinese male presented with right sided otalgia and itch. Otoscopic examination revealed an irregular black naevus in the right auditory canal. An intraoperative excision showed a black pigment foreign body giant cell reaction. Clinicians should be aware of the possibility of a foreign body granuloma of the ear canal that might mimic a melanoma.
    Matched MeSH terms: Skin Neoplasms
  4. Mohd Tahir MKA, Ramanathan A, Foo GBT, Gopalan S, Zainal Abidin M, Abdul Rahman F
    Ann Dent, 2020;27(1):28-32.
    MyJurnal
    Pilomatrixoma is a relatively common benign tumour arising from the matrix and inner sheath of a normal hair follicle as well as hair cortex. It is usually presented as a superficial, solitary, firm mass which is asymptomatic and slowly growing. It accounts for about 0.2% of all routine skin specimens and may poses a diagnostic challenge as it may resemble other common benign lesions found in the head and neck region. We report a case of a 33-year old men presented to us with a pilomatrixoma of the right cheek, surgical management and histological findings.
    Matched MeSH terms: Skin Neoplasms
  5. Byrne SN, Sarchio SN
    Oncoimmunology, 2014 Jan 01;3(1):e27562.
    PMID: 24744978
    Sunlight causes skin cancer by directly damaging DNA as well as by suppressing antitumor immune responses. A major mechanism whereby sunlight exerts immunosuppressive effects is by modulating the migration of chemokine (C-X-C motif) receptor 4 (CXCR4)-expressing dermal mast cells into and away from the skin. We have demonstrated the importance of this by showing that the systemic administration of the CXCR4 antagonist AMD3100 prevents sunlight-induced immunosuppression as well as the consequent carcinogenic response. Our results highlight the therapeutic potential of antagonizing CXCR4 signaling, especially in individuals who are at high risk of developing skin cancer.
    Matched MeSH terms: Skin Neoplasms
  6. Asha’ari ZA, Shiyuti MI, Abdullah K, Selimin A, Sathananthar KS
    MyJurnal
    Pilomatrixoma is a benign tumour that originates from the matrix of the hair root. This rare tumour is usually managed by the dermatologists. The commonest location of this tumour is in the head and neck region; hence, it can be encountered by any doctors with interest in this area. When presented in the neck, this hard tumour may pose a diagnostic challenge. A case report of pilomatrixoma misdiagnosed as a metastatic neck disease from fine-needle aspiration cytology is presented. The mistake in the diagnosis has led to a more aggressive and high morbidity surgery than necessary. It is important that head and neck doctors be aware of this condition and includes it in the differential diagnosis of hard masses presenting in the neck.
    Matched MeSH terms: Skin Neoplasms
  7. Yatiee SL, Mohd Khairi MD, Md Salzihan MS, Ikmal HB
    Med J Malaysia, 2018 04;73(2):121-122.
    PMID: 29703880 MyJurnal
    The incidence of intradermal nevus in the external auditory canal is uncommon. We herein are describing a case of 60-year-old lady who presented with foreign body sensation in the right external ear canal (EAC) with mild discomfort and ear bleed during ear picking. Otoscopic examination revealed hyperpigmented mass on the floor of the outer two third of EAC. Complete excisional biopsy of the mass resulted in histopathology findings of intradermal nevus. Despite the fact that the disease is not alarming, the possibilities of benign melanocytic nevi transformation into malignant lesions such as melanoma need to be ruled out.
    Matched MeSH terms: Skin Neoplasms
  8. Md Roduan MR, Hamid RA, Sulaiman H, Mohtarrudin N
    Biomed Pharmacother, 2017 Oct;94:481-488.
    PMID: 28779710 DOI: 10.1016/j.biopha.2017.07.133
    Annona muricata, locally known as soursop has been reported to exhibit antiproliferative activities against various cancer cell lines. In this current study, we have investigated the antitumor promotion of various fractions of Annona muricata leaves (AML); hexane (AMLH), dichloromethane (AMLD) and methanol (AMLM) fraction respectively on 7, 12-dimethylbenz[α]anthracene (DMBA) induced and 12-0-tetradecaboylphorbol-13-acetate (TPA) promoted skin tumorigenesis in mice via morphological assessment, biochemical analysis and histopathological evaluation. The results of the study revealed significant inhibition in tumor incidence, tumor burden and tumor volume in the groups received AMLH and AMLD, respectively, and suppressive effects in group received AMLM compared with carcinogen control group at week 21. Superoxide dismutase, catalase, and lipid peroxidation levels were returned to near normal by administration of AML to DMBA/TPA-induced mice. The above findings were supported by histopathological studies, in which the extensive epidermal hyperplasia in carcinogen control group was restored to normal in AML treated groups. Whilst, annonacin, a major annaonaceous acetogenin was found to be the highest in AMLH and AMLD. From the present study, it can be inferred that AML supressed DMBA/TPA-induced skin tumor and this antitumor-promoting activity may be linked to the antioxidant/free radical-scavenging constituents of the extract and annonacin contained in the extracts.
    Matched MeSH terms: Skin Neoplasms/drug therapy*; Skin Neoplasms/enzymology; Skin Neoplasms/prevention & control*
  9. Lim WY, Morton RL, Turner RM, Jenkins MC, Guitera P, Irwig L, et al.
    JAMA Dermatol, 2018 04 01;154(4):420-427.
    PMID: 29490373 DOI: 10.1001/jamadermatol.2018.0021
    Importance: The standard model of follow-up posttreatment of localized melanoma relies on clinician detection of recurrent or new melanoma, through routinely scheduled clinics (clinician-led surveillance). An alternative model is to increase reliance on patient detection of melanoma, with fewer scheduled visits and increased support for patients' skin self-examination (SSE) (eg, using smartphone apps to instruct, prompt and record SSE, and facilitate teledermatology; patient-led surveillance).

    Objective: To determine the proportion of adults treated for localized melanoma who prefer the standard scheduled visit frequency (as per Australian guideline recommendations) or fewer scheduled visits (adapted from the Melanoma Follow-up [MELFO] study of reduced follow-up).

    Design, Setting, and Participants: This survey study used a telephone interview for surveillance following excision of localized melanoma at an Australian specialist center. We invited a random sample of 400 patients who had completed treatment for localized melanoma in 2014 to participate. They were asked about their preferences for scheduled follow-up, and experience of follow-up in the past 12 months. Those with a recurrent or new primary melanoma diagnosed by the time of interview (0.8-1.7 years since first diagnosis) were asked about how it was first detected and treated. SSE practices were also assessed.

    Main Outcomes and Measures: Proportion preferring standard vs fewer scheduled clinic visits, median delay between detection and treatment of recurrent or new primary melanoma, and SSE practices.

    Results: Of the 262 people who agreed to be interviewed, the mean (SD) age was 64.3 (14.3) years, and 93 (36%) were women. Among the 230 people who did not have a recurrent or new primary melanoma, 149 vs 81 preferred the standard vs fewer scheduled clinic visits option (70% vs 30% after adjusting for sampling frame). Factors independently associated with preferring fewer visits were a higher disease stage, melanoma on a limb, living with others, not having private health insurance, and seeing a specialist for another chronic condition. The median delay between first detection and treatment of recurrent or new primary melanoma was 7 and 3 weeks, respectively. Only 8% missed a scheduled visit, while 40% did not perform SSE or did so at greater than 3-month intervals.

    Conclusions and Relevance: Some patients with melanoma may prefer fewer scheduled visits, if they are supported to do SSE and there is rapid clinical review of anything causing concern (patient-led surveillance).

    Matched MeSH terms: Skin Neoplasms/diagnosis*; Skin Neoplasms/pathology; Skin Neoplasms/surgery
  10. Singhvi A, Joshi A
    Malays J Med Sci, 2015 Sep;22(5):89-92.
    PMID: 28239273
    Melanoma of the sinonasal cavity has a high incidence of amelanotic presentation. Its diagnosis is difficult for clinicians and pathologists because of its hidden location and lack of pigmentation at the microscopic level. We reported a case of amelanotic melanoma of the maxillary sinus that showed aggressive extension to the oral cavity after extraction of the maxillary tooth. Histologically, the lesion resembled a plasmacytoid tumour. Diagnosis was made through the positive immunohistochemical staining for S100 and HMB-45.
    Matched MeSH terms: Skin Neoplasms
  11. Mutalik VS, Nichat P, Carnelio S, Solomon M, Radhakrishnan R
    J Contemp Dent Pract, 2014 Jan 1;15(1):119-21.
    PMID: 24939279
    Calcifying epithelial odontogenic tumor (CEOT) is a rare, benign, locally aggressive odontogenic epithelial tumor that affects the jaws. Although there are numerous reports on the variants of CEOT, occurrence of clear cells with complete absence of calcification has been a rarity. Histochemical analysis of tumor cells revealed glycogen granules with PAS staining, with absence of CD 1a staining in clear cells, while the amyloid-like deposit associated with clear cells showed green birefringence with Congo red. We report an unusual variant of CEOT occurring in a 27 years old male patient.
    Matched MeSH terms: Skin Neoplasms/pathology
  12. Wong SW, Kyaw L, Ong LC, Zulfiqar AM
    J Paediatr Child Health, 2011 Apr;47(4):237-9.
    PMID: 20500432 DOI: 10.1111/j.1440-1754.2010.01739.x
    Sturge-Weber syndrome is a neurocutaneous syndrome characterised by facial port wine stain, ipsilateral leptomeningeal angioma and vascular eye abnormalities. We report a rare case of Sturge-Weber syndrome without facial nevus presenting with neonatal seizures.
    Matched MeSH terms: Skin Neoplasms*
  13. Khoo JJ, Choon SE
    Malays J Pathol, 2003 Jun;25(1):73-8.
    PMID: 16196382
    Extramammary Paget's disease (EMPD) is a rare disorder and may be found in the vulva, scrotum, penile area, perianal region and the groin. Frequently, it is associated with an underlying regional neoplasm or internal malignancy. We report 2 cases of EMPD; one involving the scrotal area and the other the vulva. Both were elderly patients who presented to the dermatologists with chronic eczematous lesions in the perineum that did not respond to topical treatment. Skin biopsies confirmed extramammary Paget's disease. Investigations for internal malignancies were negative. However, one of the patients defaulted treatment before surgery. The other patient had two excision surgeries with skin grafting to try to achieve tumour free margins. A long term follow-up was planned for him to look for recurrences. These cases emphasise that EMPD can mimic exudative dermatitis and present as a chronic non-healing lesion in the perineum for many years. Clinicians should have a high index of suspicion to pick up the disease early by biopsy. Various immunohistochemical markers not only can help differentiate other histological diagnoses but also help predict the presence of underlying malignancies. Management of EMPD included thorough search for occult or underlying malignancy followed by complete excision surgery with intraoperative frozen sections. Even then, recurrences are high for this disease and long term follow-up is advocated.
    Matched MeSH terms: Skin Neoplasms/pathology*
  14. Looi LM
    Cancer, 1983 Nov 15;52(10):1833-6.
    PMID: 6627203
    Congo-red screening demonstrated intratumor deposits of amyloid in 35 of 53 unselected cases of basal cell carcinoma. Male subjects had a higher amyloid positivity rate than female subjects. The amyloid deposits were permanganate-resistant and located in the stroma between clumps of tumor cells, as well as abutting the advancing front of the neoplasm. Solar elastosis was often observed in the overlying and adjacent subepidermis. The relationship between amyloid positivity and the different histological subtypes of basal cell carcinoma, tumor ulceration, and density of the lymphoplasmacytic stromal infiltrate were also studied. The possibility that amyloid originates from the tumor cells and is a result of tumor apoptosis (degeneration) is discussed.
    Matched MeSH terms: Skin Neoplasms/pathology*
  15. Kwan Z, Yong SS, Robinson S
    PMID: 31508854 DOI: 10.1111/phpp.12510
    BACKGROUND: Analysis of Internet search trends has been performed to evaluate interest in sun protection, artificial tanning, and skin cancers among the public, particularly in Western countries. This observational study aimed to investigate the relative popularity of search terms relating to sun protection, sunburn, skin cancers, and tanning used in Google Trends® in three South-East Asian countries (Malaysia, Singapore, and Indonesia).

    METHODS: The relevant search terms were queried using the Google Trends® in each location and worldwide. The search volume indices were compared between locations and over a time period from January 1, 2004, to January 31, 2019. Correlations between "sunblock" and "sunburn" as well as "sunblock" and search terms relating to skin cancers ("skin cancer," "melanoma," "basal cell carcinoma," and "squamous cell carcinoma") were evaluated.

    RESULTS: The favored search term relating to sun protection in this region was "sunblock" despite the term itself being a misnomer. The relative popularity of searches for "sunblock" also showed an increase over time and was generally higher compared with interest in sunburn, skin cancers, and artificial tanning practices. Positive correlations were noted between "sunblock" and "sunburn" in Malaysia and "sunblock" and "melanoma" in Singapore.

    CONCLUSION: Insights into search trends may assist public health promotion to raise awareness regarding sun protection and skin cancers in the region by targeting commonly used terms for each geographical location.

    Matched MeSH terms: Skin Neoplasms/prevention & control*
  16. Musalli AH, Talukdar PD, Roy P, Kumar P, Wong TW
    Carbohydr Polym, 2020 Sep 15;244:116488.
    PMID: 32536388 DOI: 10.1016/j.carbpol.2020.116488
    This study examined the effects of folate environment of oligochitosan nanoparticles on their cellular internalization profiles in human melanoma cells. The conjugates and nanoparticles of oligochitosan-folate, oligochitosan-carboxymethyl-5-fluorouracil, and oligochitosan-folate-carboxymethyl-5-fluorouracil were synthesized by carbodiimide chemistry and prepared by nanospray drying technique respectively. The cellular internalization profiles of oligochitosan-folate nanoparticles against the human malignant melanoma cell line (SKMEL-28) were evaluated using confocal scanning electron microscopy technique through fluorescence labelling and endocytic inhibition, as a function of nanoparticulate folate content, size, polydispersity index, zeta potential, shape, surface roughness and folate population density. The cytotoxicity and cell cycle arrest characteristics of oligochitosan-folate-carboxymethyl-5-fluorouracil nanoparticles, prepared with an optimal folate content that promoted cellular internalization, were evaluated against the oligochitosan-folate and oligochitosan-carboxymethyl-5-fluorouracil conjugate nanoparticles. The oligochitosan-folate conjugate nanoparticles were endocytosed by melanoma cells via caveolae- and lipid raft-mediated endocytic pathways following them binding to the cell surface folate receptor. Nanoparticles that were larger and with higher folic acid contents and zeta potentials exhibited a higher degree of cellular internalization. Excessive conjugation of nanoparticles with folate resulted in a high nanoparticulate density of folate which hindered nanoparticles-cell interaction via folate receptor binding and reduced cellular internalization of nanoparticles. Conjugating oligochitosan with 20 %w/w folate was favorable for cellular uptake as supported by in silico models. Conjugating of oligochitosan nanoparticles with carboxymethyl-5-fluorouracil and 20 %w/w of folate promoted nanoparticles-folate receptor binding, cellular internalization and cancer cell death via cell cycle arrest at S phase at a lower drug dose than oligochitosan-carboxymethyl-5-fluorouracil conjugate nanoparticles and neat carboxymethyl-5-fluorouracil.
    Matched MeSH terms: Skin Neoplasms/drug therapy*
  17. Eshkoor SA, Ismail P, Rahman SA, Mirinargesi M, Oshkour SA
    Biosci Trends, 2009 Jun;3(3):105-9.
    PMID: 20103831
    Abnormalities of Rb-pathway components are common in the formation of cancer. The immunostaining for cyclin D1 and p16 protein was applied on 1 mm serial tissue microarray (TMA) paraffin sections. Tissue microarray (TMAs) is potentially a good method to find the molecular features of the genes and expressions of them. The aim of this study was to evaluate the protein expressions of cyclin D1 and p16 genes in squamous cell carcinomas (SCCs) of skin and compare with the normal skin tissue. Twenty-five cases of cutaneous SCCs expressed cyclin D1 and p16 proteins. All SCCs samples on the slides showed positive protein expressions of cyclin D1 and p16 genes. Our findings suggested that the increased protein expressions of cyclin D1 and p16 genes might lead to aberrant expressions of these proteins in the affected tumor cells. This study demonstrated that cell cycle controlled deregulation and uncontrolled cell cycle progression might result in the carcinogenesis.
    Matched MeSH terms: Skin Neoplasms/metabolism*
  18. Warren S, Li V, Drayton R, May K
    Int J STD AIDS, 2018 11;29(11):1120-1122.
    PMID: 29665741 DOI: 10.1177/0956462418767183
    A 43-year-old Malaysian man with well-controlled HIV infection on combination antiretroviral therapy presented with a six-week history of a widespread rash. The patient was otherwise well but was developing new lesions on a daily basis. Referral to Dermatology instigated punch biopsies, which revealed a diagnosis of lymphomatoid papulosis type A. This case highlights the importance of swift referral, especially in cases of spontaneous regression of symptoms, in order to obtain the correct diagnosis. In most patients, this condition tends to be chronic, with its chronicity and benign clinical course setting it apart from cutaneous anaplastic T-cell lymphoma and Hodgkin's disease, which are major entities in the histological differential diagnosis.
    Matched MeSH terms: Skin Neoplasms/pathology*
  19. Kothare SN
    Singapore Med J, 1978 Jun;19(2):98-105.
    PMID: 751194
    This is an analysis of histologically proven neoplasms encountered in Sarawak in 1976 and 1977. There were 1447 benign and 1368 malignant tumours. The detailed breakdown of malignant neoplasms with their racial and sex distribution is reported, Lymph node involvement, with primary and metastatic lesions, constituted the largest single group with 22.3 per cent of all malignancies. The next in order of frequency was the Reproductive system with a marked preponderance of Cervical Carcinoma in females. The next in frequency were Skin cancers (8.85%) and Nasopharyngeal Carcinoma (8.4%). Primary liver cell cancer and Breast cancer constituted 5.85 per cent and 5.79 per cent respectively of all malignant tumours. The high prevalence of malignant neoplasms in Chinese is suggestive of racial predisposition.
    Matched MeSH terms: Skin Neoplasms/epidemiology
  20. Lim P, Paver R, Peñas PF
    J. Am. Acad. Dermatol., 2010 Nov;63(5):832-5.
    PMID: 20950738 DOI: 10.1016/j.jaad.2009.12.026
    BACKGROUND: Mohs micrographic surgery (MMS) provides a combination of high cure rate and tissue conservation. Epidemiologic factors and changes in techniques may affect the way MMS is performed.
    OBJECTIVE: We sought to evaluate changes over time in the type of patients and skin cancers that are treated using MMS, and the repairs used to close the defects.
    METHODS: We conducted a retrospective study on patients treated with MMS at the Skin and Cancer Foundation Australia, Westmead, in 1997 against those treated in 2007. Patient demographics (age, sex), pathology of tumor, anatomic site of the tumor, preoperative tumor size, postoperative defect size, and repair method were analyzed.
    RESULTS: There was a 260% increase in the number of procedures (596 in 1997 vs 1587 in 2007). The 2007 cohort was a little older (62 vs 64 years), but there were no differences in sex, anatomic site, rate of basal/squamous cell carcinoma, squamous cell carcinoma histologic subtypes, or preoperative tumor size. However, there were fewer superficial basal cell carcinomas, and the postoperative defect size was smaller in 2007 (P < .0001). There was also a decrease in the use of grafts and second-intention healing to close the defects and an increase in the number of side-to-side closures (P < .0001).
    LIMITATIONS: Retrospective study at one institution is a limitation.
    CONCLUSION: Although tumor size and the percentage of tumors in each anatomic site did not change over 10 years, the size of the defect created after MMS has become smaller. This reduction in defect size may explain why more defects are now repaired by side-to-side closure and flap repairs whereas fewer defects are repaired by skin grafting.
    Matched MeSH terms: Skin Neoplasms/epidemiology; Skin Neoplasms/surgery*
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