Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:3.5.1.1 (asparaginase)
 2,695 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A 49-year-old man presented with a left nasal cavity mass, biopsy of which revealed extranodal NK/T cell lymphoma. A PET-CT scan showed increased F-18 FDG uptake in the nasal mass, anterior mediastinal lymph nodes, and multiple subcutaneous nodular deposits in the chest wall, gluteal region, and right femoral areas. The patient achieved complete remission with salvage l-asparaginase therapy after failing first-line standard anthracycline-based chemotherapy. PET-CT was very useful in detecting subcutaneous nodules consistent with widespread dissemination. There is limited literature data on the use of the PET scan in the diagnosis and staging of extranodal nasal NK/T-cell lymphomas. Our case highlights the important role of F-18 FDG PET in the staging of these patients.
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PMID:Disseminated extranodal NK/T-cell lymphoma, nasal type, with multiple subcutaneous nodules: utility of 18F-FDG PET in staging. 1843 Nov 60

A 28-year-old man complained of pain in the oral mucosa and pharynx in March 2011, and then developed fever and generalized swelling of the cheek. In March 2012, a gum biopsy led to a diagnosis of extranodal natural killer/T-cell lymphoma (ENKL). (18)F-FDG-PET revealed significant uptake in the mouth, tonsils, jawbone, shoulder blade, humerus, ilium, femur, and spleen. After two courses of the SMILE (dexamethasone, methotrexate (MTX), ifosfamide, L-asparaginase, etoposide) regimen, the response was stable disease. However, a high-dose MTX/cytarabine (MA) regimen was effective. After three courses of the MA regimen, a partial response was achieved. Then, allogeneic bone marrow transplantation from an unrelated donor was performed. At 10 months after transplantation, there was no sign of recurrence. Although the optimal treatment for ENKL refractory to the SMILE regimen has yet to be established, our case suggests the MA regimen to be a potentially effective treatment option.
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PMID:[Successful treatment with high-dose methotrexate/cytarabine regimen in a patient in SMILE regimen-resistant extranodal natural killer/T-cell lymphoma]. 2449 44

A 13-year-old boy with mediastinal T-cell lymphoblastic lymphoma demonstrated an altered biodistribution with diffuse activity in subcutaneous white adipose tissue and decreased visceral activity on interim posttreatment FDG PET/CT. This altered biodistribution was attributed to administration of the chemotherapeutic enzyme L-asparaginase 3 hours preceding the PET/CT, altering adipocytes amino acid and glucose metabolism. Treatment response assessment was adversely affected by the altered biodistribution, emphasizing the importance of maximizing the time between chemotherapy and PET/CT during successive oncologic treatment cycles. Because adipocytes protect leukemic cells in culture from L-asparaginase, we hypothesize that white adipose tissue-altered biodistribution may be related to L-asparaginase resistance.
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PMID:Altered FDG Biodistribution in Subcutaneous White Fat on PET/CT Following L-Asparaginase Chemotherapy. 3308 70