"MCRNLMPs have histopathological features and genetics that are similar to that of clear cell renal cell carcinoma 5. These malignant cells are found in small groups within the septae of adjacent cysts without expansive growth 5."
"MCRNLMPs appear as entirely cystic lesions with a number of intervening septae."
"Although MCRNLMPs cannot be accurately differentiated from other cystic renal cell carcinomas clinically or radiologically, it has been suggested that the density measurement in the cyst septae during the corticomedullary phase can be helpful. Other cystic renal cell carcinomas have a significantly higher value during this phase of the scan and a cut-off value of ≥38 HU has a sensitivity of 83% and specificity of 80% 2,4."
"MCRNLMP is a multicystic lesion without nodular solid component. The cysts have thin walls and are filled with simple or heterogenous fluid 5. Contrast enhanced ultrasound has been shown to be as effective as CT and MRI for lesion characterisation 5."
Expected headings
"MRI"
"The reported incidence of MCRNLMPs is 1-2% of all renal tumours 2,3. They are typically encountered in middle-aged adults 5. There is a slight male predilection 5."
"The prognosis of these tumours is excellent. There are no reported cases of metastatic spread or local recurrence/growth 5."
"As these tumours are slow-growing and have an indolent natural history they are usually asymptomatic and are found incidentally when imaging of the kidneys is carried out for other indications 5. Occasionally, if the tumour is large it can present with mass effect, haematuria or flank pain 5."