His postnatal course did not show anything abnormal, except for a poor growth rate. At the age of four years, he presented withabdominal protrusion. On physical examination he had a peculiar face, short neck, disproportionate short stature and low growth indices as well as extremity edema and hypertension. Laboratory examinations demonstrated nephrotic range proteinuria (2626 mg/day), hyperlipidemia (TG=293 mg/dl, cholesterol=307 mg/dl), hypoalbuminemia (Alb=2.2 mg/dl), T-cell deficiency (CD4/CD8=0.36, normal range:

1.3-3.9) and hypothyroidism. Inhibitors,research,lifescience,medical Bone survey revealed generalized osteopenia, platyspondyl of cervical spines, beaking of thoracolumbar vertebrae, epiphyseal dysgenesis of femur and shallow acetabulum. These signs and symptoms are characteristic of SIOD. Therefore, molecular analysis of SMARCAL1 gene in the patient and his family members was performed. The analysis revealed homozygousity for the missense mutation c.1682G>A (R561H) in the patient (panel A figure 1). The parents and one

sibling were heterozygous for this mutation Inhibitors,research,lifescience,medical (panel B, C and D figure 1). Figure 1 The sequences of SMARCAL1 related to Schimke immuno-osseous dysplasia (SIOD). Sequence (A), from the patient of this report exhibiting Inhibitors,research,lifescience,medical characteristics of Schimke immuno-osseous dysplasia with a homozygote AA sequence (c.1682) leading to the substitution … At the age of eight years, he developed colicky abdominal pain and vomiting. Palpation of the abdomen revealed a hard mass in right upper abdomen. A barium

enema showed ileocolic intussusception (figure 2). Laparatomy revealed a 2-cm intramural mass in the cecum. Pathologic analysis of the resectioned mass showed diffuse infiltration Inhibitors,research,lifescience,medical of medium sized lymphocytic Inhibitors,research,lifescience,medical cells with conspicuous nucleoli and high mitotic figures (figure 3). Immunohistochemistry of the lymphoma cells was diffusely reactive for leukocyte common antigen (LCA) and CD20 (figure 4). Latent membrane protein-1 (LMP-1) antigen of EBV was negative. All other markers such as CD3, CD2, CD3, CD5, CD7, CD15, and CD30 were also negative. These VE-821 cell line findings were indicative of NHL- B cell type (stage III). The patient was treated with chemotherapeutic agents including vincristine, cyclophosphamide, adriamycine and intrathecal of methotrexate using half of their usual doses, because of the underlying immunodeficiency. Following chemotherapy, he developed febrile neutropenia (WBC=2000, PMN=10%, Lymph=78%, Eos=5%, Mono=4%, Baso=3%), and despite supportive care and prophylactic antibiotics, expired due to enterobacter sepsis. Figure 2 Barium enema showing ileocolic intussusception in the patient with Schimke immuno-osseous dysplasia. Figure 3 Sections from intestine show diffuse infiltration of intermediate –sized cells in the mucosa. Figure 4 The lymphoma cells are diffusely positive for CD20.