TABLE 1. Selected characteristics of 14 patients with sudden-onset amnesia and complete hippocampal ischemia of unclear etiology — Massachusetts, June 2012–July 2016.
| Characteristic | No. (%) |
|---|---|
|
Age group (yrs)
| |
| 19–30 |
6 (43) |
| 31–40 |
2 (14) |
| 41–52 |
6 (43) |
|
Male sex
|
10 (71)
|
|
Reported history of substance use
|
13 (93)
|
| Opioids* |
12 (86) |
| Benzodiazepines† |
6 (43) |
| Marijuana |
6 (43) |
| Cocaine |
5 (36) |
| Amphetamines (dextroamphetamine/amphetamine) |
2 (14) |
| Lysergic acid diethylamide (LSD) |
2 (14) |
| 3,4-methylenedioxymethamphetamine (MDMA) |
1 (7) |
| Mushrooms |
1 (7) |
| Phencyclidine (PCP) |
1 (7) |
|
Toxicology screening (blood and/or urine) done
|
13 (93)
|
| Any positive results |
11 (85) |
| Opiates |
8 (62) |
| Marijuana/Cannabinoids |
4 (31) |
| Cocaine |
2 (15) |
| Benzodiazepines |
2 (15) |
| Amphetamines |
1 (8) |
| Barbiturates§ |
1 (8) |
| Salicylates |
1 (8) |
| Multiple substances | 5 (38) |
* One patient had oxycodone/acetaminophen prescribed.
† Four patients had a benzodiazepine prescribed.
§ Patient had butalbital/acetaminophen/caffeine prescribed.