# A Case of Spontaneous Atraumatic Subdural Hematoma Without Known Precipitating Factors

## TL;DR

A woman developed a subdural hematoma without any known cause or trauma, and was successfully treated with surgery.

## Contribution

This case report highlights a rare instance of idiopathic subdural hematoma with no known precipitating factors.

## Key findings

- The patient had acute subdural hematoma without trauma or risk factors.
- Hemicraniectomy and evacuation were performed, followed by cranioplasty.
- A second idiopathic hematoma was found later with no coagulopathy detected.

## Abstract

Subdural hematoma (SDH) is a disease commonly seen in both the emergency department and the intensive care unit. Here, we present a case of a woman who developed acute SDH, without any precipitating trauma nor predisposing risk factors. She was managed with hemicraniectomy and SDH evacuation, with subsequent cranioplasty. Routine surveillance imaging found a subsequent, small, and again idiopathic SDH. Comprehensive hematologic workup demonstrated no evidence of coagulopathy. To our knowledge, there are minimal prior case reports published in the literature regarding idiopathic, unprovoked SDH.