Isolated intraspinal relapse of neuroblastoma after autologous bone marrow transplantation

Whole neuraxis irradiation to address central nervous system relapse in high-risk neuroblastoma

BACKGROUND

As systemic control of high-risk neuroblastoma (NB) has improved, relapse in the central nervous system (CNS) is an increasingly recognized entity that carries a grim prognosis. This study describes the use of craniospinal irradiation (CSI) for CNS relapse and compares outcomes to patients who received focal radiotherapy (RT).

METHODS

A retrospective query identified 29 children with NB treated at Memorial Sloan-Kettering Cancer Center since 1987 who received RT for CNS relapse. At CNS relapse, 16 patients received CSI (median dose, 2160cGy), and 13 received focal RT. Of those who underwent CSI, 14 (88%) received intra-Ommaya (IO) radioimmunotherapy (RIT); one patient in the non-CSI cohort received IO-RIT.

RESULTS

Patient characteristics were similar between the groups. Time to CNS relapse was 20 and 17 months for the CSI and non-CSI cohorts, respectively. At a median follow-up of 28 months, 12 patients (75%) in the CSI group are alive without CNS disease, including two patients with isolated skeletal relapse. Another patient is alive without disease after a brain relapse was retreated with RT. Three patients died-one with no NB at autopsy, one of CNS disease, and one of systemic disease. The two patients who died of NB did not receive IO-RIT. All 13 patients in the non-CSI cohort died at a median of 8.8 months.

CONCLUSIONS

Low-dose CSI together with IO-RIT provides durable CNS remissions and improved survival compared with focal RT and conventional therapies. Further evaluation of long-term NB survivors after CSI is warranted to determine the treatment consequences for this cohort.

The LMCE5 unselected cohort of 25 children consecutively diagnosed with untreated stage 4 neuroblastoma over 1 year at diagnosis

The Lyon-Marseille-Curie-Est (LMCE) of France cooperative group has previously reported successive series of unselected stage four children older than 1 year at diagnosis with metastatic neuroblastoma (LMCE 1 and 3). The goal of LMCE 5 study was to increase progression free survival rate as compared to LMCE 1 and 3. Based on improvements reported with post induction chemotherapy, the LMCE 5 used post induction for all children, but omitted total body irradiation and immunomagnetic purging in megatherapy regimen for all children. Twenty-five sequentially diagnosed children received an induction regimen which compared with previous induction included an increased dose of etoposide and cyclophosphamide, delivered similar dose of cisplatinum, and deleted doxorubicin and vincristin. After surgery treatment was stratified based on response and eligible children received etoposide carboplatin (LMCE 5A : n=10)+/-doxorubicin (LMCE 5B-C n=13) followed by megatherapy (melphalan without total body irradiation and unpurged peripheral blood stem cell rescue). The increase in drug doses during induction did not improve remission rate. The progression free survival at 6 years is 8%. It is significantly worse than LMCE 3, and equivalent to LMCE 1 study though toxic death rate has decreased with increasing experience. Failure to improve the response rate during induction and reducing the megatherapy regimen may be the main factors in this disappointing result. Modified strategies for induction, non toxic alternative to total body irradiation, and post megatherapy regimen should be developed.

Lack of evidence of osteo-medullary metastases at diagnosis in patients with high grade gliomas

High grade gliomas usually show a transient response to standard therapy by radiation. A local evolution leads to patient death in most of the cases. Necropsic series suggest that metastatic evolution is rather frequent in lungs, lymph nodes, bones or bone marrow. Are these metastatic deposits present initially? The authors retrospectively reviewed the bone marrow smears performed in 20 patients and the bone scans in 10 patients with high grade gliomas at time of diagnosis. None of these investigations showed metastatic deposits. It is thus suggested that metastatic deposits are probably a late event in the natural history of high grade gliomas. However, if local treatment could reach local control, metastases would probably become a major problem. Thus definitive cure of high grade glioma may require multidisciplinary approach.

LMCE3 treatment strategy: results in 99 consecutively diagnosed stage 4 neuroblastomas in children older than 1 year at diagnosis

PURPOSE

To tailor postinduction therapy for stage 4 neuroblastoma in children who are older than 1 year at diagnosis according to status after induction.

PATIENTS AND METHODS

From March 1987 to December 1992, 99 patients who were consecutively admitted were included in the Lyon-Marseille-Curie East of France (LMCE)3 strategy. After induction with the French Society of Pediatric Oncology NB87 regimen and surgery, patients who were in complete remission immediately proceeded to consolidation therapy with vincristine, melphalan, and fractionated total-body irradiation (VMT). All other patients underwent a postinduction strategy before VMT, either an additional megatherapy regimen or further chemotherapy with etoposide/carboplatin.

RESULTS

The progression-free survival (PFS) is 29% at 7 years from diagnosis, which compares favorably with that of a similar cohort of 72 patients previously reported by our group (LMCE1; PFS of 20% at 5 years and 8% at 14 years, P =.004). In the multivariate analysis, only age younger than 3 years at diagnosis (P =.0085) and achievement of complete or very good partial remission after NB87 and surgery (P =.00024) remained significant. The PFS of the 87 patients who were included in the postinduction strategy was significantly better than that of the comparable 62 patients on the LMCE1 study (32% v 11% at 7 years; P =.005).

CONCLUSION

The progressive improvements in the LMCE results over the last 10 years suggest that improvements in supportive care measures and increases in each component of this strategy (induction, postinduction, consolidation) may all contribute to increased survival rates.

Recognition of central nervous system metastases in children with metastatic primary extracranial neuroblastoma

In children with primary extracranial neuroblastoma (NB), intrinsic central nervous system (CNS) metastases (brain parenchyma or leptomeninges) are thought to occur rarely. This study was done to evaluate our anecdotal experience, which suggested that CNS involvement is becoming more frequent. Reports of computed tomographic (CT) and magnetic resonance (MR) imaging scans, biopsies, cerebrospinal fluid (CSF) cytologies, and autopsies were reviewed for children with stage IV NB diagnosed in 1978-1993 and followed at the Children's Hospital of Pittsburgh. Of 43 children over the age of 1 year, CNS metastases were documented in 7 (16.2%). Six patients developed signs or symptoms best explained by the presence of CNS tumor and had radiographic and/or histologic evidence of parenchymal disease (cortical masses on CT and MR, n = 3; suprasellar mass on CT, n = 1; diffuse leptomeningeal carcinomatosis by MR and/or autopsy, n = 2). CSF cytologies were positive in the one patient so tested. An additional asymptomatic patient had extensive CNS involvement at autopsy. In two of these children, the CNS was the first or only site of recurrent disease. It is concluded that intrinsic CNS disease is not uncommon in children with NB over the age of 1 year and there has been a trend toward its increasing recognition in recent years. Whether this is a function of wider use of diagnostic tools or a true change in natural history over time with increased intensity of chemotherapy is not clear. A study that prospectively monitors children with advanced neuroblastoma, radiographically and with CSF cytologies (prior to treatment and at 6-monthly intervals), is under way and should help to better define the natural history in the context of current therapies.

Spontaneous regression of intraspinal neuroblastoma

In two infants aged 5 days and 2 months paresis of the legs due to spinal cord compression by a dumbbell neuroblastoma suddenly appeared. Immediate surgical resection of only the paraspinal tumor mass was performed. Without any further treatment, prompt spontaneous regression of the intraspinal component occurred, and the paresis disappeared within 2 weeks in both infants. We advocate surgical excision of the paraspinal tumor mass as the sole treatment in infants with symptomatic dumbbell neuroblastoma.

Brain metastases in children with solid tumors

BACKGROUND

Brain metastases are uncommon among children with solid tumors. However, improvements in survival have increased the period of time during which children are at risk for developing these metastases. The authors reviewed brain metastases in children with solid tumors treated at the Centre Léon Bérard during the 9 years between 1987 and 1995.

METHODS

Among 486 patients with solid tumors, 162 eventually developed distant metastases in their disease process, including 12 brain metastases detected by imaging. The tumor type, clinical setting, imaging characteristics, treatment modalities, and outcome were assessed for each patient.

RESULTS

The most common tumors causing brain metastases were Ewing's sarcoma (in three patients), neuroblastoma (in three patients), and osteogenic sarcoma (in three patients). At the time of initial diagnosis, 9 of the 12 patients had metastatic disease. All but one patient initially received intensive multiagent chemotherapy, including high dose chemotherapy with bone marrow rescue in six patients. The median time from initial diagnosis to the detection of brain metastases was 15 months. These metastases were clinically detectable in 10 patients and subclinical in 2 patients. Brain metastases were present at the time of first relapse in five patients. In two patients, the brain was the only site of relapse. All other patients had extensive systemic disease. Seven patients had multiple brain metastases. Two children underwent surgical resection of solitary metastases, and eight were irradiated. One child achieved complete remission following chemotherapy and irradiation. All other children died, mostly of their systemic disease, within a median period of 3 months.

CONCLUSIONS

The introduction of effective systemic chemotherapy has changed the patterns of brain metastases in children. The increasing incidence of these metastases in patients with sarcoma and neuroblastoma suggests that the brain is a pharmacologically protected site in patients initially diagnosed with metastatic disease.

Secondary central nervous system metastases in children with neuroblastoma

Cerebral and meningeal involvement in patients with primary extracranial neuroblastoma (NB) is unusual although it is generally present in disseminated disease. The intensification of chemotherapy that has prolonged survival in these children has changed the pattern of relapse presentation, as occurs with isolated central nervous system (CNS) disease. We report 4 patients with secondary CNS metastases. Three infants of 16, 14, and 10 months of age, diagnosed with primary abdominal NB stage 4, presented neuromeningeal metastases during maintenance chemotherapy with seizures and cranial hypertension as the first manifestation. Another 8-year-old patient diagnosed with NB stage 3 presented local relapse with later neuromeningeal metastases. All died in the following 3 months. The possibility of CNS relapse in patients with NB should be considered when neurological symptoms and signs appear. These new relapse forms overshadow the prognosis of these children.