An 18-year-old male presented with acute onset a history of blurring of vision for the same duration on examination, the patient has quadriparesis with areflexia. Both the pupils are non-reactive. The most probable diagnosis is –
**Core Concept**
The clinical presentation described in the scenario, characterized by acute onset blurring of vision, quadriparesis, areflexia, and non-reactive pupils, suggests a neurological disorder affecting the brainstem and spinal cord. This is likely due to a condition causing increased intracranial pressure (ICP) and subsequent compression of vital structures.
**Why the Correct Answer is Right**
The patient's symptoms are consistent with a diagnosis of **Tabes Dorsalis** or **Subacute Combined Degeneration (SCD)** of the spinal cord caused by **Vitamin B12 deficiency**, but the given symptoms more likely indicate **Tabes Dorsalis** caused by **Neurosyphilis**. Neurosyphilis is a complication of syphilis infection that can lead to inflammation of the central nervous system, including the brain and spinal cord. The non-reactive pupils suggest involvement of the oculomotor nerves, which is a common finding in neurosyphilis. The increased ICP could be due to the inflammation and subsequent edema of the brain.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the scenario described. The patient's symptoms are not consistent with a diagnosis of **Multiple Sclerosis (MS)**, which typically presents with optic neuritis, transverse myelitis, or other demyelinating lesions in the central nervous system.
**Option B:** This option is not consistent with the patient's symptoms. **Guillain-Barré Syndrome (GBS)** is an autoimmune disorder that causes muscle weakness and areflexia, but it does not typically cause blurring of vision or non-reactive pupils.
**Option C:** This option is not relevant to the scenario described. **Cervical Spondylosis** is a degenerative condition affecting the cervical spine and can cause neck pain and stiffness, but it does not typically cause the symptoms described in the scenario.
**Clinical Pearl / High-Yield Fact**
Neurosyphilis can present with a wide range of symptoms, including visual disturbances, motor weakness, and changes in mental status. It is often associated with non-reactive pupils and increased ICP.
**Correct Answer: C. Neurosyphilis**