Brown tumors, compression syndromes and erythropoietin resistance is seen in:: (A) Hypothyroidism, (B) Hyperthyroidism, (C) Hyperparathyroidism, (D) Osteoporosis
Answer is C. Clinical manifestations of severe hyperparathyroidism include bone pain and fragility, brown tumors, compression syndromes and erythropoietin resistance in part related to the bone marrow fibrosis.