some fun facts 4 u hoes to rule out the wrong answers:

Arcuate nucleus aka “infundibular nucleus” = hypothalamic nucleus. Projects dopaminergic neurons to anterior pituitary gland --> inhibits PRL. One of the 4 main dopamine pathways of the brain. Prolactin also gives feedback and inr dopamine secretion via this pathway [p 487 FA 2019]

Frontal cortex = oligodendrioma [p 514 FA 2019] rare, slow growing, fried egg appearance, may present with seizures

pituitary adenoma [p 514 FA 2019] - Bitemporal hemianopia - Most commonly a prolactinoma (hyperplasia of lactotrophs) - Male: decr libido, infertility - Female: galactorrhea, amenorrhea (PRL negative feedback on hypothalamic GnRH) - Can also see hyperplasia of somatotrophs (GH) --> acromegaly, gigantism or corticotrophs --> Cushing disease

PPRF = in charge of eye movements/conjugate gaze [p 503 FA 2019] - A stroke by the basilar artery of circular willis will lead to loss of horizontal, but not vertical eye movements

tumor of Pineal Gland (Pinealoma) causes Parinaud Syndrome (vertical gaze palsy)

Location - Dorsal midbrain.

Parinaud syndrome—vertical gaze palsy, pupillary light-near dissociation, lid retraction, convergence-retraction nystagmus.

Causes - Stroke, hydrocephalus, pinealoma.

I think the question stem may have a mistake because according to FA (2021 p. 528), Parinaud causes light-near dissociation wherein the light pupillary reflex is impaired while accommodation is intact. The question said accommodation is impaired...Anyway, pineal gland tumor fits the best.