A morphologic variant of acinar adenocarcinoma of the prostate gland characterized by the presence of signet ring malignant cells. The disease is acinar prostate adenocarcinoma, signet ring variant (MONDO_0002672, a Monarch Disease Ontology identifier). Also known as: acinar prostate adenocarcinoma, signet Ring variant, prostate gland signet ring cell carcinoma, prostate signet Ring cell carcinoma, prostate signet ring cell carcinoma, signet Ring cell carcinoma of prostate, signet Ring cell carcinoma of the prostate.