hair diseases

..proteins by pemphigus autoantibodies, the presence of mutations in desmosomal genes underlying human skin and hair diseases, and the generation of epidermal phenotypes in mice when these genes are targeted or manipulated...

..Defining this network is critical for understanding mechanisms involved in numerous skin and hair diseases, including diseases that result in alopecia and some skin cancers...

..Defining this network is critical for understanding mechanisms involved in numerous skin and hair diseases, including diseases that result in alopecia and some skin cancers...

..proteins by pemphigus autoantibodies, the presence of mutations in desmosomal genes underlying human skin and hair diseases, and the generation of epidermal phenotypes in mice when these genes are targeted or manipulated...

..These mutations occur without an underlying defect in DNA mismatch repair...

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..Our results show that pilomatrixomas retain a certain degree of differentiation indicative of distinct hair-forming cells...

..Our data also demonstrate that the combination of DNA macroarray, LCM and quantitative real-time PCR is a powerful approach for the study of gene expression in defined cell populations with limited starting material...

..We believe that sunlight may have played a role in the development of this peculiar neoplasm...

..CONCLUSIONS: The case reported herein is the first confirmation of melanocytic matricoma, a distinctive adnexal neoplasm with characteristic clinical and pathologic features, which differentiate it from pigmented pilomatricoma...

..These data imply that unlike the normal hair follicle, cortical differentiation in pilomatricomas is not under the control of the canonical Wnt signaling pathway...

..The latter could be related to their shared method of keratinization or shared dysfunction of the cellular adhesion complex leading to tumorigenesis...

..Therefore, patients with systemic diseases or malignancy should be carefully examined and followed for sudden changes in pre-existing benign cutaneous tumours...

..No significant difference in the CK profile among the BCC subtypes studied was found...

..To the best of our knowledge, this is the first report on the beta-catenin immunohistochemical expression profile in PC...

..The appearance of shadow or ghost cells might represent differentiation into hair in these 3 kinds of tumors...

..We speculate that the observed dominance of the epithelial differentiation pathway over the competing conventional shadow cell differentiation pathway may prevent massive calcification of the tumor...

..We report a 30-year-old female patient with a rare localisation of pilomatrixoma in the right arm. The pilomatrixoma was excised and at one year follow-up there has been no evidence of recurrence...

..Therefore their association probably is incidental. Nevertheless, the unusual size of our patient's pilomatricomas could be due to deletion of the NSD1 gene, which characterizes Sotos syndrome...

..Complete surgical excision is the treatment of choice. Otolaryngologists should consider pilomatricoma in the differential diagnosis of neck masses...

..MR images may be helpful in diagnosis. Pathologic findings are well correlated with imaging findings...

..Finally, the routine use of cell blocks is recommended because in many of the cases presented ghost cells were fragmented or obscured in smears, but were more readily identified in cell block sections...

..These are usually absent in mucoepidermoid carcinoma and represent a hallmark of PMT. This case illustrates well the risk of misdiagnosing a pre-auricular PMT as a malignant tumor of the parotid gland...

..Recognition of a unique constellation of cytologic features in FNA smears in the appropriate clinical context is most helpful in making this distinction...

..The use of fine needle aspiration cytology (FNAC) and diagnostic imaging may help confirm the diagnosis. The correct treatment is surgical. However, should the tumour recur then the possibility of malignancy should be considered...

..Abundant fibrous long-spacing collagen was observed in the connective tissue and fibroblasts within papillae...

..In all the cases, FNAC established epithelial nature of the lesion, excluding clinically mimicking inflammatory/neoplastic lesions of other origin. FNAC should be followed by excision biopsy to accurately type the epithelial neoplasm...

..We describe a follicular hybrid cyst of the tarsus that contained features of pilomatricoma and steatocystoma and perforated the palpebral conjunctiva. The unusual location and histopathologic features are discussed...

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..It is possible that sun damage played a role in stimulating migration of melanocytes among matrical cells in this case...

..Immunohistochemical and molecular methods are used to differentiate this lesion from benign or malignant forms of pilomatrixoma. differentiation: a case study with analysis of beta-catenin...

..Pilomatricoma should be considered in diferential diagnosis when primitive-appearing cells are aspirated, especially in rapidly growing early lesions...

..The authors report the ultrasonographic and mammographic features of a case of pilomatrixoma of the breast, a rare benign neoplasm originating from the hair matrix...

..Our report highlights an unusual clinical appearance of pilomatricoma that made us consider a variety of primary or secondary cutaneous neoplasms in its differential diagnosis...

..We discuss the differential diagnosis of this rare tumour, and the difficulty in distinguishing this lesion from an atypical proliferating pilomatrixoma. Ultrastructural features of pilomatrix carcinoma are also discussed...

..These syndromes may be independent, but these rare diseases and genetic abnormalities may be linked together...

..This tumor has not yet been reported in an immunosuppressed transplant patient...

..Histopathology of the resected specimen revealed pilomatrixoma...

..No adverse effects were noted. To the authors' knowledge, this is the first report of multiple pilomatrixomas arising in a young dog and successfully controlled with oral retinoids...

..CONCLUSIONS: Basaloid cells in association with ghost cells are important cytopathologic criteria that may provide a definitive cytologic diagnosis of pilomatricoma in dogs, and may help avoid a false diagnosis of malignancy...

..Here, we describe a case of pilomatricoma of the periorbital region in a young Indian female patient. We believe that its inclusion is essential in the differential diagnosis of hard masses of the maxillofacial and paraoral regions...

..We report the case of a 15-year-old Turkish boy suffering from an aggressive pilomatrixoma of the infra-auricular region and review the literature about this unclear entity...

..Wide local excision has been recommended given the high rate of reoccurrence. Mohs micrographic surgery may provide optimal treatment of this neoplasm given the ability to have 100% margin control...