نتایج جستجو برای: neurocutaneous melanosis
تعداد نتایج: 1327 فیلتر نتایج به سال:
Gastrointestinal melanosis is observed most frequently in the colon it also can develop in the ileum, duodenum and esophagus very rarely. Melanosis ilei was thought that causative materials such as aluminum, magnesium, silicate, titanium and other compounds entered the body through the ingestion of agents. We experienced a case of melanosis in the terminal ileum that a 65-year-old female patien...
Department of Pathology, Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China Motac collaborative laboratory, Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China Université Victor Segalen Bordeaux 2, Centre National de la Recherche Scientifique, Bordea...
Clinical and histopathological features of four cases of multifocal amelanotic malignant melanoma of the conjunctiva in association with 'acquired melanosis sine pigmento' are reported. The absence ofconjunctival pigmentation in this extremely rare combination of lesions prevented early diagnosis and clinical monitoring. As a result orbital exenteration was required in three cases. This multice...
Congenital melanocytic nevi (CMN) can be associated with neurological abnormalities and an increased risk of melanoma. Mutations in NRAS, BRAF, and Tp53 have been described in individual CMN samples; however, their role in the pathogenesis of multiple CMN within the same subject and development of associated features has not been clear. We hypothesized that a single postzygotic mutation in NRAS...
We present the case number 22 of prostatic melanosis in the literature reports. Prostatic melanosis is a very rare, benign lesion characterized by the presence of melanin both in the epithelium of the prostate gland as well as in the stromal dendritic cells, requiring no additional treatment. It constitutes the melanocytic lesions of the prostate together with blue nevus and melanoma.
Background: A rippled type of pigmentation is observed on the arms, forearms, and bony prominences, more commonly in women with a history of chronic rubbing. The terminology (commonly referred to as frictional melanosis) and its relation with cutaneous amyloidosis has been debated. Materials and Methods: Twenty one patients with pigmented skin lesions with manifestations suggestive of frictiona...
Melanosis refers to abnormal or excessive deposition of melanin pigment in the cells and/or tissue, which can be seen in any organ but commonly in skin and oral mucosa. Melanosis of the urinary bladder is an extremely rare benign condition and only a handful of cases been reported in the English literature before. In this article, we report a new case of urinary melanosis, describe the differen...
Bladder melanosis is a rare condition that has been incidentally discovered and reported fewer than 20 times. While independently benign, it has been reported with urothelial cell carcinoma and melanoma. The source of the melanocytes and cause of the melanosis is currently unknown; the presence of melanin pigment is pathognomonic for the disorder. Lesions appearing throughout the bladder are ch...
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