What medical term describes a condition of stone formation in a particular organ?

The term gastrolithiasis refers specifically to the formation of stones in the stomach, which is consistent with the context of the question about stone formation in a particular organ. The prefix "gastro-" pertains to the stomach, and the suffix "-lithiasis" indicates the presence of stones or calculi. This terminology is rooted in medical language, where "lithos" means stone in Greek. Therefore, when combined, it clearly describes the condition of stone formation within the stomach.

Other options do not pertain to stone formation in recognizable organs. Broncholithiasis refers to stone formation in the bronchial tubes, but is not as broadly recognized in practice compared to gastrolithiasis regarding specific organs. The suffixes "-ectasis" and "-emia" relate to different medical conditions. "-ectasis" indicates dilation or expansion (such as in bronchiectasis), while "-emia" refers to a condition related to blood (as in anemia). Thus, these terms do not accurately describe stone formation in any organ.