ArticleBMC cancer2025
Imaging features of eosinophilic solid and cystic renal cell carcinoma.
Article in BMC cancer, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectiveTo analyse imaging features and the differential diagnosis of eosinophilic solid and cystic renal cell carcinoma (ESC-RCC) .
methodsThe current study retrospectively reviewed the imaging features of seven patients (4 male, 3 female; age range: 25-70 years; median age: 46 years) diagnosed with ESC-RCC at our institution from March 2020 to October 2024.
resultsSix patients presented with unilateral and solitary lesions, one patient (1/7, 14.3%) exhibited bilateral multifocal lesions. The tumour size ranged from 2.0 to 8.5 cm, with a mean diameter of 4.0±2.1 cm. Most (5/8, 62.5%) tumours showed high and low mixed density on non-contrast CT scans. The remaining tumors exhibited the following characteristics: one presented as homogeneous isodensity, another as hypodense with foci of hyperdensity, and a third as slightly hyperdense with small areas of hypodensity. On contrast-enhanced CT, 75% (6/8) of the tumours demonstrated heterogeneous enhancement with peak CT values in the corticomedullary phase for four cases and in the nephrographic phase for two. Of the remaining two, one displayed a gradually progressive enhancement pattern with peak enhancement in the nephrographic phase, while the other showed mild enhancement. All (8/8) tumors were well-demarcated, with 75% (6/8) causing adjacent vascular compression and 87.5% (7/8) showing floating vessels. Tumour classification indicated that most tumours (37.5%) were categorized as type III, with types II and IV each comprising two cases, and type I included only one. Microscopically, all tumours were well-demarcated and lacked a capsule, lymph node metastasis, hemorrhage, calcification and necrosis.
conclusionsESC-RCC should be considered when encountering a well-defined cystic-solid lesion without calcification, haemorrhage, or fat, and the solid component shows various enhancement with the degree of enhancement less than that of the adjacent renal cortex in all phases.
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