Differential Diagnosis
- Single most likely diagnosis
- G) Supratentorial mass lesion: The patient's symptoms of increasing drowsiness, generalized headache, and focal neurological deficits (left hemiparesis, increased tone on the left side, and Babinski sign on the left) suggest a lesion affecting the brain, particularly in the supratentorial region. The history of a fall five months prior could be related to the onset of symptoms if it led to a subdural hematoma or other mass lesion that has been gradually increasing in size.
- Other Likely diagnoses
- B) Communicating hydrocephalus: This condition could explain the patient's symptoms of increasing drowsiness and headache due to increased intracranial pressure. However, the presence of focal neurological signs (e.g., left hemiparesis) is less typical for communicating hydrocephalus.
- E) Impaired absorption of cerebrospinal fluid: Similar to communicating hydrocephalus, impaired CSF absorption could lead to increased intracranial pressure and symptoms like headache and drowsiness. Focal signs might be less common but could occur depending on the underlying cause.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- A) Cerebral venous occlusion: Although less common, cerebral venous occlusion can present with headache, altered mental status, and focal neurological signs. It is a condition that requires prompt diagnosis and treatment to prevent severe outcomes.
- F) Infratentorial mass lesion: While the patient's symptoms suggest a supratentorial lesion, an infratentorial mass could cause increased intracranial pressure and hydrocephalus, leading to similar symptoms. The presence of focal signs might be less typical but could occur, especially if there is brainstem involvement.
- Rare diagnoses
- C) Cytotoxic edema: This condition is more typically associated with acute ischemic strokes or other forms of brain injury. While it could explain some of the patient's symptoms, the gradual onset over a month makes it less likely.
- D) Idiopathic intracranial hypertension: This condition primarily affects young, obese women and is characterized by increased intracranial pressure without a mass lesion. The patient's age, sex, and presence of focal neurological signs make this diagnosis less likely.