Gerota, Dimitru, Romanian anatomist and surgeon, 1867-1939.
Gerota capsule - Synonym(s): Gerota fascia
Gerota fascia - the condensation of the fibroareolar tissue and fat surrounding the kidney to form a sheath for the organ. Synonym(s): Gerota capsule; renal fascia
Gerota method - injection of the lymphatics with a dye that is soluble in chloroform or ether but not in water.

http://medical-dictionary.thefreedictionary.com/Gerota's fas...

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Note added at 32 mins (2014-08-17 14:28:59 GMT)
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Gerota's capsule אפשרי גם כן

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Note added at 42 mins (2014-08-17 14:38:56 GMT)
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http://forum.mtstars.com/174867.html

According to this there is also Gerota's fat, which is probably the correct answer in your case.