Formulas for diagnosing and treating hormone-dependent cancers and cancers of the organs responsible for steroid hormone synthesis

A formulation of a therapeutic or diagnostic agent in the form of a nano-emulsion, comprising a continuous aqueous phase and at least one dispersed oily phase, wherein:

• the oily phase comprises:
• at least one amphiphilic lipid,
• at least one solubilizing lipid,
• at least one compound of the following formula (I):
• (R-L)n-A (I),
• wherein :
• n represents an integer from 1 to 5
• L represents a simple bond or a divalent group selected from —O—, —COO—, —OOC—, —CO—NR′—, —NR′—CO—, —S—, —NR′—CO—NR′—, —O—CO—O—,
• wherein R′ and R″ represent independently H or a linear or branched alkyl with 1 to 20 carbon atoms and
• R represents a linear or branched alkyl comprising at least 11 carbon atoms or a linear or branched alkenyl comprising at least 11 carbon atoms, and
• A represents a steriodic or sterolic group,
• and
• the aqueous phase includes at least one co-surfactant comprising at least one chain consisting of alkylene oxide units;
• the proportion of the compound of formula (I) being from 0.05% to 3% by weight based on the weight of the dispersed oily phase, the weight of the dispersed oily phase including the weight of the co-surfactant.