Transient osteoporosis of the hip is a rare condition, idiopathic and self-limiting disease. This malady (complaint, disorder) is more common in the third trimester of pregnancy and postpartum. Characterized by migratory pain in bearing joints, periarticular osteopenia and diffuse radiographic pattern of bone marrow edema on MR. We report the case of a woman 28 years old, in the 34th week of her pregnancy, who after a fall, presents pain and functional limitation in her right leg. The MR showed bone edema at the proximal right femur. She was treated with rest and a walker, and she was scheduled for prophylactic fixation in the operating room in a few weeks. Two weeks after hospital admission, left hip started aching. A new MR showed edema in the head and intertrochanteric region of the left hip, with improvement of previous findings in the right hip. Surgical treatment was cancelled and bed rest was suggested as expectant management. At 9 weeks of onset of symptoms and 8 weeks postpartum, the patient was asymptomatic and performs daily activities without limitations. High index of suspicion and early diagnosis is the key to avoid fracture as a result of transient osteoporosis. Magnetic resonance imaging is the best non-invasive tool for pregnant women with hip pain. Early detection of the disease can avoid complications and major surgeries.

Transient osteoporosis of the hip is a rare condition, idiopathic and self-limiting disease. This malady (complaint, disorder) is more common in the third trimester of pregnancy and postpartum. Characterized by migratory pain in bearing joints, periarticular osteopenia and diffuse radiographic pattern of bone marrow edema on MR. We report the case of a woman 28 years old, in the 34th week of her pregnancy, who after a fall, presents pain and functional limitation in her right leg. The MR showed bone edema at the proximal right femur. She was treated with rest and a walker, and she was scheduled for prophylactic fixation in the operating room in a few weeks. Two weeks after hospital admission, left hip started aching. A new MR showed edema in the head and intertrochanteric region of the left hip, with improvement of previous findings in the right hip. Surgical treatment was cancelled and bed rest was suggested as expectant management. At 9 weeks of onset of symptoms and 8 weeks postpartum, the patient was asymptomatic and performs daily activities without limitations. High index of suspicion and early diagnosis is the key to avoid fracture as a result of transient osteoporosis. Magnetic resonance imaging is the best non-invasive tool for pregnant women with hip pain. Early detection of the disease can avoid complications and major surgeries.