Difference between revisions of "Bosniak classification of renal cysts"
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{| class="wikitable sortable" | {| class="wikitable sortable" | ||
!Category | !Category | ||
! | !Percent malignant | ||
! | !Management | ||
!Radiological Characteristics | |||
|- | |- | ||
| Bosniak I | | Bosniak I | ||
| 0% | | 0% | ||
| no follow-up necessary | | no follow-up necessary | ||
| Simple cyst | |||
|- | |- | ||
| Bosniak II | | Bosniak II | ||
| 0% | | 0% | ||
| no follow-up necessary | | no follow-up necessary | ||
| Minimally complex (septa <1mm or thin calcification; non-enhancing attenuation due to proteinaceous or haemorrhagic contents) | |||
|- | |- | ||
| Bosniak IIF | | Bosniak IIF | ||
| 5% | | 5% | ||
| follow-up | | follow-up (4 years<ref name=pmid24766033>{{Cite journal | last1 = Hindman | first1 = NM. | last2 = Hecht | first2 = EM. | last3 = Bosniak | first3 = MA. | title = Follow-up for Bosniak category 2F cystic renal lesions. | journal = Radiology | volume = 272 | issue = 3 | pages = 757-66 | month = Sep | year = 2014 | doi = 10.1148/radiol.14122908 | PMID = 24766033 }}</ref>) | ||
| Minimally complex (increased septa, but minimally thicknened/nodular; perceived, but not measurable enhancement) | |||
|- | |- | ||
| Bosniak III | | Bosniak III | ||
| 50% | | 50% | ||
| excise to r/o malignancy | | excise to r/o malignancy | ||
| Indeterminate (thick or nodular septa with measurable CT enhancement) | |||
|- | |- | ||
| Bosniak IV | | Bosniak IV | ||
| 100% | | 100% | ||
| almost certainly malignant | | almost certainly malignant | ||
| Clearly malignant (solid mass +/- cystic/necrotic component) | |||
|} | |} | ||
Latest revision as of 16:31, 12 May 2018
Bosniak classification of renal cysts is a radiologic classification system for kidney cysts. It originally consisted of four categories (I, II, III, IV).[1][2]
A subsequent modification turned it into a five category system:
| Category | Percent malignant | Management | Radiological Characteristics |
|---|---|---|---|
| Bosniak I | 0% | no follow-up necessary | Simple cyst |
| Bosniak II | 0% | no follow-up necessary | Minimally complex (septa <1mm or thin calcification; non-enhancing attenuation due to proteinaceous or haemorrhagic contents) |
| Bosniak IIF | 5% | follow-up (4 years[3]) | Minimally complex (increased septa, but minimally thicknened/nodular; perceived, but not measurable enhancement) |
| Bosniak III | 50% | excise to r/o malignancy | Indeterminate (thick or nodular septa with measurable CT enhancement) |
| Bosniak IV | 100% | almost certainly malignant | Clearly malignant (solid mass +/- cystic/necrotic component) |
Note:
- The "F" in IIF have minimally suspicious features and should get follow-up imaging.[4]
Schematic
See also
References
- ↑ Bosniak, MA. (Jan 1986). "The current radiological approach to renal cysts.". Radiology 158 (1): 1-10. doi:10.1148/radiology.158.1.3510019. PMID 3510019.
- ↑ Curry, NS.; Cochran, ST.; Bissada, NK. (Aug 2000). "Cystic renal masses: accurate Bosniak classification requires adequate renal CT.". AJR Am J Roentgenol 175 (2): 339-42. doi:10.2214/ajr.175.2.1750339. PMID 10915671.
- ↑ Hindman, NM.; Hecht, EM.; Bosniak, MA. (Sep 2014). "Follow-up for Bosniak category 2F cystic renal lesions.". Radiology 272 (3): 757-66. doi:10.1148/radiol.14122908. PMID 24766033.
- ↑ Ding, Y.; Chen, L.; Deng, FM.; Melamed, J.; Fan, R.; Bonsib, S.; Zhou, M. (Apr 2013). "Localized cystic disease of the kidney: distinction from cystic neoplasms and hereditary polycystic diseases.". Am J Surg Pathol 37 (4): 506-13. doi:10.1097/PAS.0b013e318271eff9. PMID 23211292.
- ↑ Muglia, VF.; Westphalen, AC.. "Bosniak classification for complex renal cysts: history and critical analysis.". Radiol Bras 47 (6): 368-73. doi:10.1590/0100-3984.2013.1797. PMID 25741120.