Nodular sclerotic change in XXXX : a potential diagnostic problem.

@entity1 @entity2280 @entity241 @entity3808
Nodular sclerotic change in @entity241 ( @entity241 ) is not a well-recognized event. @entity3808 is reported in three @entity1 with @entity241 : a 33-year-old @entity1 with a left subclavian mass, a 29-year-old @entity1 with a mass on the left crus and a 31-year-old @entity1 with a mass on the left cheek. Histologically, lesions consisted of two types of feature, one type being typical of @entity241 and the other being rich in collagen. In the first @entity1 , each type formed a distinct compartment, each of which contained scattered cells containing melanin pigment. In the second @entity1 , foci with typical @entity241 histology were distributed within the collagen-rich area and also formed a substantial compartment in the periphery of the lesion, with pigmented cells being distributed mainly in and around the cellular area. In the third @entity1 , the collagenous area occupied about half of the lesion. There was no pigmentation. In all three cases the collagen-rich area contained sparsely distributed fibroblast-like cells that stained positive with @entity2280 . @entity3808 in @entity241 could cause substantial difficulty in diagnosis if the biopsy material were partial and small. The clinical history and knowledge about the existence of this kind of histological variation in @entity241 are important.
