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Background: This study evaluated the effect of mycophenolate mofetil, methotrexate, and pimecrolimus on the expression of cdk4 and p16, important proteins implicated in hyperproliferation and arrest in the G1 phase, in oral lichen planus (OLP)., Materials and Methods: In this randomized clinical trial, 60 patients were randomly assigned in three equal groups to receive either pimecrolimus cream, or mycophenolate mofetil or methotrexate, both supplemented with pimecrolimus. Pretreatment and post-treatment specimens were immunohistochemically stained for detecting cdk4 and p16., Results: A significant decrease in cdk4 cytoplasmic positivity was noted in all three treatment groups and was especially more significant in the MTX group ( P < 0.0001) than in the other two groups ( P < .001). However, a significant decrease in the cdk4 nuclear staining was noted with only systemic treatment groups of MMF ( P < 0.05) and MTX ( P < 0.01), both supplemented with pimecrolimus. No significant decrease in cytoplasmic p16 levels was noted in the MTX group while a significant decrease in cytoplasmic p16 levels was noted in the other two groups; however, no significant decrease in p16 nuclear staining was noted with any treatment., Conclusion: By decreasing the expression of cdk4 and p16, pimecrolimus, methotrexate, and mycophenolate mofetil decrease the malignant potential of OLP lesions. However, methorexate can be a better alternative in cases showing high cdk4 expression., Competing Interests: There are no conflicts of interest., (Copyright: © 2021 Indian Journal of Dermatology.)

Competing Interests: There are no conflicts of interest.

Eccrine syringofibroadenoma (ESFA) is a rare, benign tumor of eccrine sweat gland origin that usually presents as a nodule on the extremities of an elderly person. It can also present as an ulcerative plaque, verrucous lesion, papular or nodular lesion or as palmoplantar keratoderma. Although the clinical features are variable, histology is characteristic in the form of anastomosing strands, cords and columns of epithelial cells embedded in a fibrovascular stroma. We report the case of a 62-year-old male with a nodular lesion on the extremity that caused secondary involvement of the nail in the form of complete nail dystrophy. The histology showed features consistent with ESFA. Nail involvement by ESFA is a rare presentation and is rarely described in the literature.

Port-wine stains (PWSs) are congenital vascular lesions caused by progressive ectasia of blood vessels located in the vascular plexus of the dermis. Acquired PWSs develop later in life but are identical in morphology and histology to the congenital PWSs. Less than 75 cases of acquired PWSs have been reported in the published literature, of which there has not been a single report from India so far. Various factors have been proposed for its pathogenesis like trauma, actinic exposure, drugs, tumors, and herpes zoster infection. We report an acquired port-wine stain in a 41-year-old male. The causative factors, treatment, and previous reports of this uncommon entity have also been reviewed.

Context: Frictional lichenoid dermatitis., Background: Frictional lichenoid dermatitis (FLE) is an entity that is probably under diagnosed and has been variably associated with either friction and/or atopy with a distinctive seasonal variation., Aims and Objectives: To study correlation of FLE with UV index and to assess its association with atopic dermatitis., Materials and Methods: A cross sectional analysis of children with FLE was done, over a period of 6 years in two tertiary hospitals. A detailed history and examination was done to assess the features of atopic dermatitis. The number of cases seen per month was compared with the mean monthly UV index. Two-tailed significance tests using Pearson's coefficient of correlation and T-test were used to interpret the data. (P < 0.05)., Results: One hundred seventy-four patients were studied using the UKC criterion 17.2% of the patients had AD while xerosis (40.3%) was the predominant cutaneous finding. The number of patients seen in summer was more than in winter (P < 0.05) but there was no statistical difference between the cases in winter and spring. There was a significant correlation of the number of cases per month with UV index (P = 0.019). Almost 42% of patients gave a history of recurrence., Conclusions: FLE is probably not associated with atopic dermatitis and is likely to be related to the ambient UV index though a larger cohort with meticulous follow up may be needed to draw a final conclusion., Statistical Analysis Used: The Pearson's coefficient of correlation was used for comparing the cases per month with the UV index. The tests of hypothesis used included the paired T-tests. F-test of variance, Welch test, Wilcoxon rank sum test and the Kolmogorov-Smirnov Test. P < 0.05 was considered significant.

Griscelli syndrome 2 is a rare autosomal recessive disorder of pigmentary dilution of hair, skin, splenohepatomegaly, pancytopenia, immune and neurologic dysfunction. Clinical course is characterized by recurrent infection triggered by uncontrolled T-lymphocyte and macrophage activation, called hemophagocytic syndrome. Since the primary presentation is with depigmented hair, we attempt to highlight diagnostic difficulties in such cases in developing countries like ours where pigmentary changes in hair and skin are commonly attributed to severe malnutrition. We also evaluated phenotype of all 10 cases of genotype (c.C550T; p.R184X), collected from published literature worldwide and emphasize the potential role of above mutation as hotspot in Southeast Asian region.

Pityriasis rosea (PR) is an acute or subacute inflammatory skin disease characterized by erythematous papulosquamous eruptions localized on the trunk and arms. The eruptions are self-limiting and usually disappear gradually in 2-10 weeks, without any treatment. Typical PR is much easier to diagnose than the rare atypical forms. There is a passing mention of PR with erythema multiforme-like lesions in the literature, but no extensive case series have been published till date. We present a series of five patients for whom we believe atypical PR is the likely diagnosis.