Delayed Pituitary Tumor Treatment Can Lead to Permanent Blindness

A case study published in an international academic journal has revealed that untreated pituitary tumors can lead to acute vision loss. Medical experts warn that patients experiencing headaches accompanied by vision deterioration should seek immediate examination.

According to the medical community on the 10th, the journal "Clinical Case Reports" published a case of a 56-year-old woman who permanently lost vision in one eye after delaying treatment following a pituitary adenoma diagnosis.

The woman was prescribed glasses three years ago for blurred vision symptoms. A subsequent CT scan revealed a 3×2cm pituitary adenoma, but she avoided treatment due to fear of the test results.

Two years later, when she returned to the hospital after experiencing severe headaches, vomiting, and acute vision loss, the tumor had grown to 4.6×2.7cm. Her left eye had completely lost the ability to perceive light.

Medical staff administered prednisolone and performed tumor resection surgery. Two days after surgery, her right eye recovered to the point of being able to count fingers, but complete vision loss in the left eye was confirmed. The final diagnosis was pituitary apoplexy, a condition where hemorrhage or infarction within the tumor causes the pituitary gland to swell and compress the optic chiasm. Pituitary apoplexy is a medical emergency with a mortality rate of up to 15.3% if left untreated.

This is not the only case where treatment delays led to irreversible outcomes. Academic journals have also reported a case of a 48-year-old woman who visited the hospital after experiencing progressive vision loss in both eyes over several months, where a pituitary macroadenoma was discovered.

This patient showed only visual abnormalities without other neurological symptoms such as headaches. She was diagnosed with a brain tumor only after optical coherence tomography (OCT) confirmed atrophy of the retinal ganglion cell layer and nerve fiber layer. Another reported case involved a 19-year-old male diagnosed with pituitary macroadenoma due to vision loss and headaches who discontinued follow-up care, only to find more than 10 years later that the tumor had invaded the cavernous sinus, making surgical treatment difficult.

Pituitary adenomas directly affect vision in this manner. Pituitary adenomas are the most common cause of optic chiasm compression in adults, causing various symptoms including vision loss, visual field defects, color vision abnormalities, and headaches.

Research indicates that 40-60% of patients with pituitary macroadenomas experience visual abnormalities. Vision impairment typically begins when tumors exceed 2cm in size, and without treatment, continued vision deterioration can lead to blindness.

The duration of symptoms is a key predictor of post-surgical vision recovery. Studies also show that visual symptoms in elderly patients tend to be misdiagnosed as other ophthalmic conditions, leading to delayed diagnosis.

Medical professionals emphasized, "If headaches and vision loss occur together, patients should immediately undergo pituitary adenoma screening. The risk of permanent vision loss increases the longer treatment is delayed."