The Board has determined that the veteran's current chronic headache disability and neck injury are not related to his active military service, and thus denied both claims.

The Board granted service connection for pituitary adenoma and its secondary conditions: chronic headache disability, right eye blindness, left eye partial blindness, seizure disorder, hypothyroidism, pituitary insufficiency, gynecomastia, and diabetes insipidus.

The veteran's claim for service connection for a left shoulder disability was reopened due to new and material evidence. Effective dates were granted for right knee instability (December 11, 2017) and left knee instability (February 12, 2018). Other issues were remanded.

The Board granted an initial rating of 70 percent for posttraumatic stress disorder (PTSD) with cannabis use disorder and an effective date of January 1, 2014, for the award of a total disability rating based on individual unemployability.

The Board denied service connection for vertigo, seizure disorder, cervical spine disability, lumbar spine disability, diabetes mellitus, peripheral neuropathy of the upper and lower extremities, bilateral eye disability, hypertension, chronic memory loss disability, chronic headache disability, major depressive disorder, right foot disability, right knee disability, arthritis, left foot disability, left knee disability, left hip disability, and right hip disability. However, tinnitus was granted as secondary to service-connected bilateral hearing loss.