Keratinocyte carcinoma as a chronic disease in Australia and Spain: The importance of avoidance of perceived visible scars.

BACKGROUND/OBJECTIVES: Keratinocyte cancer impacts health-related quality of life (HRQL). Disease progression and treatment can lead to adverse physical and psychosocial consequences. The skin cancer index (SCI) is a validated tool with higher scores reflecting greater HRQL. Our objectives were to assess and compare the impact of keratinocyte cancer using the SCI in two diverse populations. METHODS: A total of 120 patients were prospectively recruited from dermatology clinics in Sydney, Australia, and Santander, Spain, providing demographics and completing the SCI. RESULTS: About 61.1% of Australians reported ≥2 skin cancers (vs 20% P = <0.001), 44.4% resulting visible scars (vs 14.8% P = <0.001). Visible scars were associated with poorer HRQL, across total SCI (68.3 vs 81.5 P = <0.001), social (76.0 vs 86.7 P = 0.003) and emotional (54.2 vs 69.7 P = 0.003) domains. Interestingly, perceived visible scars were not associated with appearance scores. The Spanish population reported greater appearance (88.0 vs 75.6 P = 0.008) and emotional (70.7 vs 60.5 P = 0.034) HRQL. Surprisingly, incidence of cancer, recent disease, gender and education were not associated with HRQL impairment. CONCLUSIONS: Australians with keratinocyte cancer experience poorer HRQL compared to a Spanish population. Offering non-surgical means when amenable and consideration of psychosocial needs during clinical course is emphasised. While our study highlights the importance of HRQL tools, our results question the sensitivity of the SCI across populations. Further research is required to substantiate its ongoing use.

Multiple benign adnexal tumours: Anything but benign.

Muir Torre syndrome is an autosomal dominant disorder characterised by germline mutations in mismatch repair genes involved in DNA repair, leading to microsatellite instability and a propensity to tumour formation. We report a case of a 67-year-old gentleman who underwent biopsy of a smooth nodular lesion on the nasal tip, histopathologically consistent with sebaceous adenoma. Immunohistochemistry suggested a loss of MSH6. Subsequent colonoscopy identified a poorly differentiated adenocarcinoma, with loss of staining for MSH6 and a germline mutation identified on genetic analysis. These findings were consistent with a diagnosis of Muir Torre syndrome. Whilst there is controversy in the literature regarding universal screening for Muir Torre syndrome, the early detection of visceral neoplasms is crucial. The authors strongly support screening for Muir Torre syndrome (with patient consent) upon discovery of a cutaneous sebaceous neoplasm, even in the absence of a personal or family history of visceral malignancy.

The microbiome and atopic eczema: More than skin deep.

Discoveries in the defective molecular composition of the epidermal barrier, such as the epidermal protein filaggrin, in those with atopic eczema (or atopic dermatitis [AD]) have proved crucial in understanding this disease, but its aetiology remains to be fully elucidated. The epidermal barrier is just one interface between the microbial world and our immune system. Recent advances in molecular technology have demonstrated for the first time the true scale of the normal human microbiome and changes seen in disease states. In this review article we discuss the role of the human microbiome in the aetiology and maintenance of AD. The role of Staphylococcus aureus within the skin microbiome is examined, in addition to the role of other bacteria and fungi, identified using novel culture-independent methods. The significant contribution of the gut microbiome and its manipulation via probiotic use is also reviewed. We emphasise that the microbiome of separate systems, including the gut, has a significant role to play in the manifestation of this cutaneous disorder. To date, there has been a lack of studies investigating whether changes to the lung microbiome may play a role in AD. An early interaction between the microbiome and immune system via multiple routes (skin-gut-lung) could feasibly affect the risk of a subsequent development of atopic diseases. When making management decisions for AD patients, clinicians must be mindful of the role of the microbiome.

Factors affecting choice of repair in Mohs micrographic surgery for non-melanoma skin cancer of the head.

BACKGROUND/OBJECTIVES: In Mohs micrographic surgery (MMS) the dermatologist serves as surgeon, pathologist and reconstructive surgeon. Analysis of the factors that play a part in determining defect size and closure type may result in better patient outcomes. The objective was to identify factors contributing to the defect size and closure method employed in MMS. METHODS: Retrospective analysis of all MMS performed for non-melanoma skin cancers (NMSC) of the head at the Skin and Cancer Foundation Australia, Westmead, between 1 January and 31 December 2007. RESULTS: Tumor size was the main factor involved in the final defect size (r2 : 0.60, P < 0.001), but the sex and age of the patient, tumour pathology, site and surgeon were also significantly associated with the final defect size. In a multivariate analysis, only sex did not remain as an independent factor. Regarding closure method, the age of the patient, defect size, site and surgeon were significantly associated, but patient's age did not remain significant in the multivariate analysis. CONCLUSION: Our study has demonstrated that the performing surgeon is a relevant factor in the determination of defect size and repair methods in MMS. The factors underlying this variability require further study as decisions on closure method should be made objectively, based on patient-related and tumour-related factors. As expected, the location and size of the defect are the other factors that determine the chosen method of repair.

Overcoming status quo bias in the human brain.

Humans often accept the status quo when faced with conflicting choice alternatives. However, it is unknown how neural pathways connecting cognition with action modulate this status quo acceptance. Here we developed a visual detection task in which subjects tended to favor the default when making difficult, but not easy, decisions. This bias was suboptimal in that more errors were made when the default was accepted. A selective increase in subthalamic nucleus (STN) activity was found when the status quo was rejected in the face of heightened decision difficulty. Analysis of effective connectivity showed that inferior frontal cortex, a region more active for difficult decisions, exerted an enhanced modulatory influence on the STN during switches away from the status quo. These data suggest that the neural circuits required to initiate controlled, nondefault actions are similar to those previously shown to mediate outright response suppression. We conclude that specific prefrontal-basal ganglia dynamics are involved in rejecting the default, a mechanism that may be important in a range of difficult choice scenarios.