Inclusion Criteria:

- Subjects aged 18 to 80 with lymphoma,

- Histological diagnosis of Hodgkin's lymphoma (HL) or non-Hodgkin lymphoma (NHL) of
follicular or aggressive (large cell or other),

- Patients who have not yet started their chemotherapy or who have started for less
than a month

- Patient has signed informed consent.

Exclusion Criteria:

- Pathological fractures at the time of initial diagnosis of lymphoma,

- Compression of neurological epidural,

- Patients receiving treatment for osteoporosis (including bisphosphonates, selective
modulators of estrogen receptor, calcitonin and parathyroid hormone Teriparatide).

- Discovery of osteoporosis or osteopenia fracture during the initial evaluation
requiring the establishment of an osteoporosis treatment,

- Radiotherapy to the lumbar spine or hip studied,

- Location of bone lymphoma in the lumbar spine or hip studied,

- History of disorders affecting bone metabolism (prostate cancer with androgen,
stomach cancer, hyperparathyroidism, hyperthyroidism, uncontrolled ...)

- A person incapable of giving consent personally,

- Pregnant or breastfeeding women,

- Protected Person (under guardianship)

- Patient not affiliated with a social security system.