Table 1. Primary Demographic and Clinical Characteristics of 30 Patients.
| Characteristic | No. (%) of patients |
|---|---|
| Sex | |
| Female | 23 (77) |
| Male | 7 (23) |
| Primary cancer type, histologic finding | |
| Breast | 17 (57) |
| Lung | 5 (17) |
| Melanoma | 2 (7) |
| Esophageal | 2 (7) |
| Other | 4 (13) |
| Primary tumor type | |
| Solid | 29 (97) |
| Liquid | 1 (3) |
| Parenchymal brain metastasis present | |
| Yes | 23 (77) |
| No | 7 (23) |
| Age, median (IQR) [range], y | 51 (43.25-60.25) [28-81] |
| LMD presence by cytologic analysis | |
| Positive | 22 (73) |
| Negative | 8 (27) |
| Tumor type in LMD-negative samples | |
| PTACSF | 3 (38) |
| PT | 5 (63) |
Abbreviations: IQR, interquartile range; LMD, leptomeningeal disease; PT, parenchymal tumor; PTACSF, PT that abutted the cerebrospinal fluid.