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Quiz: Too Sleepy to Look Up

Test your understanding of this case with 11 questions.

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Case Information
Review the case details while answering questions

PATIENT DEMOGRAPHICS

22-year-old female

PRESENTING COMPLAINT

Headaches, followed by sudden onset of sleepiness and increasing difficulty to rouse, prompting emergency assessment and neuro-imaging.

EXAMINATION FINDINGS

Visual Acuity: OD: 6/6. OS: 6/6 (gross assessment; formal testing limited by reduced conscious level)

Pupils: No pupillary response to light, but intact near reaction (light-near dissociation)

Fundus: Level of consciousness: GCS 13/15 (E3 V4 M6) — drowsy, rousable to voice, mildly confused

INVESTIGATIONS

Axial CT brain demonstrating a pineal region mass with obstructive hydrocephalus

Axial CT brain demonstrating a pineal region mass with obstructive hydrocephalus

Sagittal CT brain demonstrating the pineal region mass compressing the dorsal midbrain and obstructing the cerebral aqueduct

Sagittal CT brain demonstrating the pineal region mass compressing the dorsal midbrain and obstructing the cerebral aqueduct

CT Brain (axial and sagittal views): Demonstrates obstructive hydrocephalus with a large mass in the pineal region, causing local compression of the upper (dorsal) midbrain and obstruction at the level of the cerebral aqueduct.

Clinical photograph demonstrating a wide-eyed, staring appearance with bilateral eyelid retraction (Collier's sign)

Clinical photograph demonstrating a wide-eyed, staring appearance with bilateral eyelid retraction (Collier's sign)

Clinical Photography: Demonstrates a wide-eyed, staring appearance, in keeping with bilateral eyelid retraction.

Histopathology (post-surgical resection): Confirmed pinealblastoma.

Question 1 of 11

This patient presents with headaches followed by sudden onset of sleepiness and difficulty rousing. What does this evolution most urgently suggest?

Question 2 of 11

Before any examination findings are known, a large mass is identified in the pineal region compressing the dorsal midbrain. Which combination of signs would this localisation predict?

Question 3 of 11

What specifically elicits the convergence-retraction nystagmus seen in this syndrome?

Question 4 of 11

Why does this patient have no pupillary response to light, yet an intact near reaction?

Question 5 of 11

The clinical photograph shows a wide-eyed, staring appearance. What sign does this most likely represent?

Question 6 of 11

What is the most likely diagnosis for this combination of findings?

Question 7 of 11

Why does a pineal region mass characteristically cause obstructive hydrocephalus?

Question 8 of 11

Beyond imaging, what additional investigation is important in the initial work-up of a pineal region mass?

Question 9 of 11

What is the most urgent initial management priority in this patient?

Question 10 of 11

Histology following surgery confirmed which diagnosis?

Question 11 of 11

A colleague notes the patient has “some nystagmus” and wonders if this is simply a non-specific finding. How would you respond?