Pleural, Peritoneal, and Pericardial Effusions
Fig. 19.139 A smear (left) and cell block (right) of metastatic meningioma
in pleural effusion (smear: Papanicolaou x HP; cell block: H&E x HP).
Fig. 19.140 This smear of peritoneal effusion of a 17-year-old boy depicts
slightly atypical keratinizing squamous epithelial cells derived from a
testicular teratoma (Papanicolaou x MP).
Fig. 19.141 This smear of peritoneal effusion of an infant depicts cells of
an intra-abdominal rhabdoid tumor. Cross striations were not seen; the
diagnosis was corroborated by immunohistochemistry (Papanicolaou x HP).
Fig. 19.142 This smear of peritoneal effusion from an infant depicts
neuroblastoma cells. This neoplasm may form rosettes; however, none
were seen in this specimen (Papanicolaou x MP).
Fig. 19.143 This smear of peritoneal effusion of an adult depicts
non-neoplastic cells simulating the type of cellular rosette seen with
neuroblastomas; the smear contained many of these rosettes. These
rosettes consisted of inflammatory cells aggregated around foreign particles
(Papanicolaou x LP).
Fig. 19.144 This cell block of peritoneal effusion from an infant depicts
a group of hepatoblastoma cells. They have characteristics of small
adenocarcinoma cells (H&E x OI).