If you see thighs in your dream, it symbolizes your family or clan. Any event involving thighs in the dream will impact your family. If you see a part of the thigh disappearing, it indicates that there may be problems or crises within your family. Therefore, this dream can be viewed as a reflection of your family's condition and relationships.
From Imam Muhammad Ibn Seerin's Dictionary of Dreams According to Islamic Inner Traditions â entry "Thigh" (page 433).
One's thighs in a dream represent his family or clan. Anything that affects them in the dream will manifest in his family or clan. If one sees his thighs missing something in a dream, it means that he is a foreigner, or that he does not know his lineage or ancestry. Experiencing pain in one's thigh in a dream means doing harm to one's own family or clan. If one sees that a piece of skin is crafted to his thigh in a dream, it means that someone will attribute a son to him, and it will turn to be a false allegation. Thighs in a dream also represent the pillars of one's house, the head of a household, one's wife, one's husband, son, master, earnings, business, vehicle, or wealth. One's thighs in their beautiful condition in a dream also represent the correctness of one's prayers, or they may represent his garment, tools, or chair. Imputation of one's thigh in a dream means taking a long journey and dying in a foreign country. (Also see Body'; Foot; Leg)
Note: Islamic dream interpretation depends on the dreamer's circumstances and state. This is a general guide drawn directly from the source book.