Long-term survival of a patient with bone marrow gelatinous degeneration of idiopathic origin

which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Fig. 1. Serous atrophy in a diffuse and severe hypocellular background (A). Reduced fat cells, a diffuse extracellular gelatinous amorphous material, small typical lymphocytes, and mature plasma cells were also observed (B). Small islets of hematopoietic cells were detected at a level of ＜5%. Long-term survival of a patient with bone marrow gelatinous degeneration of idiopathic origin TO THE EDITOR: Gelatinous bone marrow transformation (GMT) is a rare bone marrow (BM) disorder of unknown pathogenesis. It is characterized by fat cell atrophy, focal loss of hematopoietic cells, and deposition of extracellular gelatinous substances (mucopolysaccharides rich in hyalur-onic acid) [1]. The pathogenesis of GMT involves the deposi-tion of hyaluronic acid, which hampers hematopoiesis by altering the BM microenvironment and stroma and disruption of the interactions between BM cells and cell signal-ing molecules [1]. GMT has been reported in association with chronic debilitating diseases, such as anorexia nervosa, malnutrition, and human immunodeficiency virus (HIV) infection, and after cytotoxic treatments [2]; in addition, GMT has been described in patients with myelodysplastic syndrome [3], acute myeloblastic leukemia [3], and idio-pathic myelofibrosis [4]. However, idiopathic GMT has also been reported [5]. Herein, we report a case of idiopathic GMT in a patient who had an unusual clinical course and long-term survival. The patient was a 64-year-old Caribbean woman who had been living in Rome for more than 30 years. She was referred to our clinic in December 2005 because of anemia. Her past medical history was unremark-able. She did not use alcohol, drugs, or tobacco, and her nutritional status was excellent. Physical examination was unremarkable with the exception of pallor; the patient did not have either spleen or liver enlargement. A complete blood count at admission showed normochromic-normo-cytic anemia with reticulocytopenia and normal white blood cell and platelet counts. Total and unconjugated bilirubin and serum haptoglobin levels were normal. Direct and indirect Coombs tests were negative. Serological tests for HIV, cytomegalovirus, Epstein-Barr virus, parvovirus B19, and hepatitis B and C viruses were negative. In addition, serum levels of tri-iodothyronine were normal. Moreover, no clinical or laboratory features of autoimmune disease were detected. Examination of peripheral blood smears revealed normal RBC; erythrocyte fragments were not detectable. Radiological examinations, which included a whole-body computed tomography scan, revealed no abnormalities. Occult blood loss was ruled out by fecal and urine …