... in relation to the presence of ventriculo-peritoneal shunts. Its etiology, therefore, seems multifactorial, with some suggesting its presence may be metaplastic rather than representing implantation of neoplastic deposits ( 97 , 100 ). As such, the behavior of the lesion in reports is variable, although...

... are both non-neoplastic lesions and lesions of uncertain histogenesis (see chapter 8 ), since these commonly are in the differential diagnosis of neoplastic disease. Cytologic findings are presented in relation to individual entities, where appropriate. ...

... transformation of “benign” cystic mesothelioma of the peritoneum . J Surg Oncol   2002 ; 79 : 243 – 51 . 64. Wang   W , Zhu   H , Wang   J , et al . Clonality assessment of adenomatoid tumor supports its neoplastic nature . Hum Pathol   2016 ; 48 : 88 – 94 . 65. Goode   B , Joseph...

... of neoplastic mucinous epithelium, and the latter two categories are definitively carcinomatous. With these categories in mind, the histology of low-grade tumors ( figs. 7-16 , 7-17 ) includes uniform low-grade nuclei in cells with intracellular mucin within pools of extracellular mucin ( 48 ). High-grade...

... disease: a neoplastic disorder . Hum Pathol   1999 ; 30 : 1093 - 6 . 80. Yahng   SA , Kang   HH , Kim   SK , et al . Erdheim-Chester disease with lung involvement mimicking pulmonary lymphangitic carcinomatosis . Am J Med Sci   2009 ; 337 : 302 - 4 . 81. Protopapadakis   C...

... significant pleomorphism ( fig. 3-36 ). It is important to recognize and report this pattern since it is associated with a higher incidence of lymphatic invasion ( fig. 3-37 ) and lymph node metastasis ( 156 ). Sarcomatoid mesothelioma is characterized by a proliferation of neoplastic spindle cells...

... hybridization is facilitated by comparison with a CD20 or PAX5 stain, which helps to confirm that the EBV positivity is in B cells. Immunohistochemistry for latent membrane protein is not useful for diagnosis( 90 ). Sinusoidal lymphocytosis in EBV hepatitis can mimic neoplastic processes like hepatosplenic T...

...-neoplastic liver in resections for metastatic colorectal cancer treated with oxaliplatin ( 88 , 91 ). The presentation of acute SOS is nonspecific, with abdominal pain, hepatomegaly, and mild elevation of liver enzymes, with additional features like jaundice, ascites, and portal hypertension...