A method for inhibiting growth of solid excretory system tumors in a subject, said method consisting of administering to said subject a therapeutically effective amount of a compound of formula I <chemistry id="CHEM-US-00002" num="00002"><img wi="72.56mm" file="US08410131-20130402-C00002.TIF" alt="embedded image" img-content="chem" img-format="tif"/> wherein R₁ is CH₃, R₂ is —CH₂—CH₂—OH, and X is ═O. view more

The method of claim 1 wherein the solid excretory system tumor is an advanced solid excretory system tumor.

The method of claim 1 wherein the solid excretory system tumor is a kidney tumor.

A method for treating pancreatic neuroendocrine tumors, comprising administering to a human subject in need thereof a therapeutically effective amount of 40-O-(2-hydroxyethyl)-rapamycin as a monotherapy and wherein the tumors are advanced tumors after failure of cytotoxic chemotherapy. view more

The method of claim 1, wherein a unit dose of 40-O-(2-hydroxyethyl)-rapamycin is 10 mg/day.