Approximately 50% of carcinosarcoma cases, the first biopsies are acinar adenocarcinoma
14] AMACR is also a useful diagnostic marker for the adenocarcinoma variants like foamy gland and pseudohyperplastic prostate carcinoma, although positivity is lower than that in acinar adenocarcinoma
75%) followed by acinar adenocarcinoma
The term Paneth cell-like change has been used to describe distinctive eosinophilic neuroendocrine cells that can be seen in benign prostate glands, high-grade prostatic intraepithelial neoplasia, intraductal carcinoma, and usual acinar adenocarcinoma
of the prostate (Figure 3, B).
Histological variants of prostate cancers can be defined as acinar adenocarcinoma
and nonacinar carcinoma variants.
Ductal adenocarcinoma secretes less prostatic serum antigen (PSA) than acinar adenocarcinoma
and it can appear occult on some magnetic resonance imaging (MRI) sequences.
2) The major proportions of prostate carcinomas are acinar adenocarcinoma
, although several rare histologic variants coexists.
According to morphological, anatomical, and histopathological findings and to positive immunoreactivity for cytokeratin, the tumor was characterized as acinar adenocarcinoma
in the lung and in the nodes identified in the abdominal cavity.
axillary lymph node, omentum, pericardium and soft tissue, are more often seen with SCC of the prostate than acinar adenocarcinoma
The presence of adenocarcinoma, presumably pancreatic, with large hepatic metastases, pancreatic subcutaneous fat necrosis, and very high lipase activities accompanied by normal amylase activity is consistent with acinar adenocarcinoma
of the pancreas, an uncommon entity  but so aggressive that it can lead to death with disseminated metastasis before its detection in the pancreas.
Owing to the partial collapsed irregular alveolar walls, structures looking like irregular acini may mimic acinar adenocarcinoma
, also seen in an earlier reproducibility study among 28 pathologists (6) (Figure 2, A through F; images not published with previous study).
3) Additionally, invasive prostatic acinar adenocarcinoma
, prostatic ductal adenocarcinoma, and urothelial carcinoma involving prostatic ducts mimic IDC-P morphologically.