arising in placentoid bullous lesion of the lung: report of a case with immunohistochemical study.
7) These include adenoid cystic eccrine carcinomas, aggressive digital papillary adenocarcinomas
, eccrine adenocarcinomas, and mucinous eccrine carcinomas.
The differential diagnosis includes other oral cavity minor salivary gland tumors such as PA, adenoid cystic carcinoma, and sometimes low-grade papillary adenocarcinoma
of salivary gland origin (LGPASO).
We have also seen 2 examples with ciliated epithelium and one of these had an associated high-grade papillary adenocarcinoma
with pancreatobiliary-type features.
Further, in smears from AIS, MIA, or lepidic-predominant adenocarcinoma, characteristic cellular attributes are often recognized, including uniform, round nuclei with grooves or pseudoinclusions and low nuclear to cytoplasmic ratios, but this is not specific; very similar changes may be seen in predominantly papillary adenocarcinomas
26) The growth pattern of a preinvasive component was classified as flat (conventional dysplasia) or polypoid/mass forming (the categories of adenoma, intracystic papillary neoplasms, and papillary adenocarcinomas
in situ, ie, those categories that we recently proposed (27,28) be referred to as intracholecystic papillary tubular neoplasm), and the degree of dysplasia was graded as low or high according to the established criteria.