A Rare Mimicker of an Adrenal Carcinoma: Co-occurrence of Hemorrhagic Pseudocyst and Myelolipoma

Adrenal collision tumor is the simultaneous co-occurrence of two different benign or malignant tumors in the adrenal gland (1). It is often unilateral, asymptomatic and incidentally detected. It can cause symptoms related to compression to surrounding tissues when it enlarges. It may contain two different primary tumors or one primary tumor and a metastasis. Both tumors may be malignant, one may be malignant and the other may be benign, or both may be benign (2). Radiological findings are very helpful in the diagnosis. However, it is not always possible to make a definite diagnosis with imaging findings alone, because the coexisting masses contain different tissue components. In this paper, we report imaging findings of an adrenal tumor containing a pseudocyst and a myelolipoma which was confused with adrenocortical carcinoma.