Pseudomalignancies of the head and neck

Pseudomalignancies are benign or reactive lesions that mimic malignant neoplasms either clinically or histologically. In the head and neck region there are a number of pseudomalignancies that may present to a histopathologist, including soft tissue lesions, benign odontogenic tumours and salivary gland pathology. In this review we discuss common pseudomalignant lesions that may present in the head and neck, including their clinical presentation, histopathological features and differential diagnosis.     

血管淋巴样增生伴嗜酸性粒细胞增多症临床病理观察

目的：探讨血管淋巴样增生伴嗜酸性粒细胞增多症(angiolymphoid hyperplasia with eosinopilia, ALHE)的临床病理学特征、免疫组织化学染色(immunohistochemical stain,IHC)及鉴别诊断。方法：对3例ALHE进行临床病理分析及免疫组化研究,并进行文献复习。结果：2例ALHE为女性患者,1例为男性患者,病变位于头面部真皮内,组织形态以小到中等大小血管增生为主,血管内衬胞浆丰富的上皮样内皮细胞,血管周围见大量炎细胞浸润。免疫组化染色显示CD34、CD31、CD3阳性,CD20及CK阴性。结论：ALHE是一种少见的、良性的血管瘤,诊断主要依靠特征性组织学特点。