prostatic acinar adenocarcinoma (Monarch Disease Ontology id MONDO_0002493) is an invasive adenocarcinoma of the prostate gland composed of secretory cells. It is the most common histologic type of prostate adenocarcinoma. Several morphologic variants exist, including atrophic, pseudohyperplastic, foamy gland, and oncocytic variants. Also known as: acinar adenocarcinoma of prostate, acinar adenocarcinoma of the prostate, acinar prostate adenocarcinoma, prostate acinar adenocarcinoma.