Publications by authors named "Margaret O Johnson"

5 Publications

  • Page 1 of 1

Patterns of relapse after successful completion of initial therapy in primary central nervous system lymphoma: a case series.

J Neurooncol 2020 Apr 5;147(2):477-483. Epub 2020 Mar 5.

Department of Neurosurgery, Duke University Medical Center, Durham, NC, USA.

Purpose: Primary central nervous system lymphoma (PCNSL) is a subtype of non-Hodgkin's lymphoma that involves the brain, spinal cord, or leptomeninges, without evidence of systemic disease. This rare disease accounts for ~ 3% of all primary central nervous system (CNS) tumors. Methotrexate-based regimens are the standard of care for this disease with overall survival rates ranging from 14 to 55 months. Relapse after apparent complete remission can occur. We sought to understand the outcomes of patients who relapsed.

Methods: This is an IRB-approved investigation of patients treated at our institution between 12/31/2004 and 10/12/2016. We retrospectively identified all cases of PCNSL as part of a database registry and evaluated these cases for demographic information, absence or presence of relapse, location of relapse, treatment regimens, and median relapse-free survival.

Results: This analysis identified 44 patients with a pathologically confirmed diagnosis of PCNSL. Mean age at diagnosis was 63.1 years (range 20-86, SD = 13.2 years). Of the 44 patients, 28 patients successfully completed an initial treatment regimen without recurrence or toxicity that required a change in therapy. Relapse occurred in 11 patients with the location of relapse being in the CNS only (n = 5), vitreous fluid only (n = 1), outside CNS only (n = 3), or a combination of CNS and outside of the CNS (n = 2). Sites of relapse outside of the CNS included testes (n = 1), lung (n = 1), adrenal gland (n = 1), kidney/adrenal gland (n = 1), and retroperitoneum (n = 1). Median relapse-free survival after successful completion of therapy was 6.7 years (95% CI 1.1, 12.6).

Conclusion: After successful initial treatment, PCNSL has a propensity to relapse, and this relapse can occur both inside and outside of the CNS. Vigilant monitoring of off-treatment patients with a history of PCNSL is necessary to guide early diagnosis of relapse and to initiate aggressive treatment.
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April 2020

The role of chemotherapy in the treatment of central neurocytoma.

CNS Oncol 2019 11 5;8(3):CNS41. Epub 2019 Nov 5.

Department of Neurosurgery, Duke University Hospital, Durham, NC 27710, USA.

Central neurocytoma (CN) is a rare WHO grade II central nervous system (CNS) tumor. This is an update on chemotherapeutic agents used in its treatment. An institutional review board-approved, chart review of patients seen at our institution resulted in a single case treated with chemotherapy and is herein included. We proceeded with a comprehensive literature review. We identified 18 citations, representing 39 cases of adult and pediatric CN treated with chemotherapy. With the addition of our single case, the total number of recurrent CN patients treated with temozolomide (TMZ) is nine. There exists marked heterogeneity in chemotherapy used to treat CN. TMZ is incorporated into treatment regimens in the setting of tumor recurrence: its role merits further study.
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November 2019

Utilization of Hospice Services in a Population of Patients With Huntington's Disease.

J Pain Symptom Manage 2018 02 13;55(2):440-443. Epub 2017 Sep 13.

Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania, USA.

Context: Although the early and middle stages of Huntington's disease (HD) and its complications have been well described, less is known about the course of late-stage illness. In particular, little is known about the population of patients who enroll in hospice.

Objectives: Our goal is to describe the characteristics of patients with HD who enrolled in hospice.

Methods: This is a retrospective cohort study of electronic medical record data from 12 not-for-profit hospices in the United States from 2008 to 2012.

Results: Of the 164,032 patients admitted to these hospices, 101 (0.06%) had a primary diagnosis of HD. Their median age was 57 (IQR 48-65) and 53 (52.5%) were women. Most patients were cared for by a spouse (n = 36, 36.6%) or adult child (n = 20, 19.8%). At the time of admission, most patients were living either at home (n = 39, 38.6%) or in a nursing home (n = 41, 40.6%). All were either bedbound or could ambulate only with assistance. The most common symptom reported during enrollment in hospice was pain (n = 34, 33.7%) followed by anxiety (n = 30, 29.7%), nausea (n = 18, 17.8%), and dyspnea (n = 10, 9.9%). Patients had a median length of stay in hospice of 42 days, which was significantly longer than that of other hospice patients in the sample (17 days), P < 0.001. Of the 101 patients who were admitted to hospice, 73 died, 11 were still enrolled at the time of data analysis, and 17 left hospice either because they no longer met eligibility criteria (n = 14, 13.7%) or because they decided to seek treatment for other medical conditions (n = 3, 3.0%). Of the 73 patients who died while on hospice, most died either in a nursing home (n = 29; 40%) or a hospital (n = 27; 37%). Seventeen patients (23%) died at home. No patient that started in a facility died at home.

Conclusion: Patients with HD are admitted to hospice at a younger age compared with other patients (57 vs. 76 years old) but have a significant symptom burden and limited functional status. Although hospice care emphasizes the importance of helping patients to remain in their homes, only a minority of these patients were able to die at home.
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February 2018

19-Year-Old Male with Headaches and a Possible Seizure.

Brain Pathol 2017 07;27(4):557-558

Department of Pathology and Laboratory Medicine, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania.

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July 2017