👉 Orchiomyeloma is a rare type of cancer that affects the reproductive organs, specifically the testes and ovaries. It is characterized by the growth of abnormal cells in these tissues, which can lead to changes in the normal structure and function of the organs. The cause of orchiomyeloma is not fully understood, but there are several possible factors contributing to its development: 1. Genetic mutations: Some cases have been linked to mutations in genes that affect reproductive cell development. 2.