Differential Diagnosis for 92-year-old Female with Right Kidney Cyst and Adrenal Nodule
- Single Most Likely Diagnosis
- Simple renal cyst: This is the most likely diagnosis given the CT scan findings of a 5.9 cm simple cyst in the right kidney without enhancement, which is consistent with a benign simple cyst.
- Other Likely Diagnoses
- Adrenal adenoma (for the 1.4 cm right adrenal nodule): Although the nodule is stable and small, it could still represent a non-functioning adrenal adenoma, which is a common incidental finding.
- Breast cancer recurrence or metastasis: Given the patient's history of breast cancer, there is a possibility of recurrence or metastasis, although the current findings do not specifically suggest this.
- Do Not Miss Diagnoses
- Renal cell carcinoma: Although the CT scan did not show enhancement, it is essential to consider the possibility of renal cell carcinoma, especially given the size of the cyst.
- Pheochromocytoma (for the adrenal nodule): Although rare, pheochromocytoma can present as an adrenal nodule, and missing this diagnosis could have significant consequences.
- Metastatic disease to the adrenal gland: Given the patient's history of breast cancer, it is crucial to consider the possibility of metastatic disease to the adrenal gland.
- Rare Diagnoses
- Cystic renal cell carcinoma: This is a rare subtype of renal cell carcinoma that can present as a cystic lesion.
- Adrenal cyst: Although rare, adrenal cysts can occur and should be considered in the differential diagnosis.
- Hydatid cyst of the kidney: This is a rare parasitic infection that can present as a cystic lesion in the kidney.