XXXX : histopathological and immunohistochemical diagnosis.

@entity1 @entity455 @entity1353 @entity2695 @entity2146 @entity1282 @entity1365 @entity2280 @entity1462
OBJECTIVES/HYPOTHESIS: @entity455 are a rare cause of @entity1282 and stridor in the pediatric population. Currently, there is no clear consensus on what type of @entity455 are common in the postcricoid area because adequate histological or immunohistochemistry studies are lacking. This study aimed to describe the histology and immunohistochemistry of postcricoid masses in our institutions' experience, and consolidate available data on the symptoms, management, and histology of these unusual malformations with a comprehensive literature review. STUDY DESIGN: Retrospective @entity1 and literature review. METHODS: A retrospective review of @entity1 with @entity455 was performed at two pediatric tertiary care institutions. Histology and immunohistochemistry studies were performed in @entity1 undergoing a lesion biopsy. A complete literature review of the English language was completed for cases involving @entity455 of the postcricoid area. RESULTS: Four @entity1 were identified in our study with @entity455 . All @entity1 presented with symptoms of @entity1282 and intermittent stridor. Histology and immunohistochemistry studies were performed in three @entity1 . @entity1365 was negative in all three @entity1 , and @entity2280 was positive in all @entity1 tested. Lewis Y antigen was performed in one @entity1 and was negative. A description of 19 cases reported in the English literature is included. CONCLUSIONS: @entity1 with @entity455 usually present with mild to moderate feeding difficulties, and stridor or @entity1353 with @entity2146 . Histopathology and immunohistochemistry results suggest that @entity455 may often represent @entity1462 instead of infantile @entity2695 .
