Mutations within the Activation Loop Domain of FLT3 in Two Pediatric Patients with Refractory Infant Acute Myeloid Leukemia.

Approximately 24% of all pediatric acute myeloid leukemia (AML) cases have mutations in the FMS-like tyrosine kinase 3 (FLT3) receptor gene. FLT3-TKD point mutations are rare in pediatrics and often occur in younger patients and in combination with 11q23 abnormalities. There is a paucity of data related to their prognostic implications in children. We describe 2 pediatric patients with FLT3-activating mutations as a feature of their AML. Both were diagnosed in infancy. The first experienced induction failure and had refractory disease without expression of FLT3-TKD mutation on subsequent bone marrow evaluations. His disease also harbored a KMT2A-PICALM gene rearrangement. He died of invasive fungal disease nine months after diagnosis. The second had a post-induction remission but developed swelling of the left calcaneus shown on biopsy to be a myeloid sarcoma positive for a new BRAF V600E mutation in addition to his known KMT2A rearrangement but without FLT3-TKD mutation. Despite multiple courses of therapy including BRAF/MEK-inhibition, he died of progressive disease nine months after diagnosis. FLT3 inhibition was not utilized in either patient as studies have largely focused on its role in internal tandem duplication (ITD) mutations and because the mutation was no longer detectable in either patient on subsequent evaluation. However, these cases add to the suggestion that these mutations confer a worse prognosis in pediatric AML patients.

A Case Report of Pediatric Paraneoplastic Dysautonomia.

We present the case of a 16-year-old girl who presented with severe refractory orthostatic hypotension secondary to pandysautonomia. Initially, she was treated for Guillain-Barré syndrome given clinical symptoms and increased protein on cerebrospinal fluid, but the severity of symptoms and lack of response to intravenous immunoglobulin prompted further evaluation for an autoimmune etiology. She was ultimately diagnosed with paraneoplastic neuropathy secondary to Hodgkin lymphoma. Paraneoplastic neurologic phenomena are rare, occurring in just 0.01% of cancers, and prompt recognition is crucial for initiating appropriate therapy. Rapid progression of severe disabling symptoms should raise suspicion for an underlying malignancy. The patient had limited response to splanchnic vasoconstrictors in addition to α-agonists, anticholinergics, and mineralocorticoids until initiation of modified Hodgkin lymphoma directed chemotherapy plus rituximab.

Childhood Cancer in Rhode Island.

The incidence rate of childhood cancer is increasing in the United States. We sought to describe the epidemiology of childhood cancer in the state of Rhode Island. Data from the Rhode Island Cancer Registry was reviewed to assess incidence and trends in childhood cancer for individuals age 0-19 years from 1995-2015. Cancer mortality was based on deaths with cause of deaths associated with malignant cancers filed with the Rhode Island Vital Records and CDC National Center for Health Statistics. We found that pediatric cancer is increasing in Rhode Island. Between 1995-2015, there were 1,090 new diagnoses of childhood cancer. Leukemia, tumors of the central nervous system, and lymphomas are the most common types of cancer in children in the state. Additionally, the overall mortality rate from childhood cancer is decreasing. In conclusion, the childhood cancer trends in Rhode Island are consistent with the national data. [Full article available at http://rimed.org/rimedicaljournal-2019-02.asp].