TWICE member Jeongyeon recently shared her emotional journey of battling Cushing's syndrome on the upcoming episode of tvN's 'You Quiz on the Block'. Throughout her health struggles, her sister, actress Gong Seung-yeon, acted as her primary support system, helping her navigate the difficult period and even assisting in the discovery of her health condition. Jeongyeon expressed deep gratitude to her sister for being her pillar of strength, successfully returning to her career and health, while also humorously recalling their childhood sibling dynamics. - Jeongyeon successfully recovered from Cushing's syndrome with the dedicated support and care of her sister, Gong Seung-yeon. - The upcoming 'You Quiz on the Block' episode scheduled for the 20th features the sisters discussing their close bond and the challenges they faced during Jeongyeon's health downturn. | TWICE member Jeongyeon recently shared her emotional journey of battling Cushing's syndrome on the upcoming episode of tvN's 'You Quiz on the Block'. Throughout her health struggles, her sister, actress Gong Seung-yeon, acted as her primary support system, helping her navigate the difficult period and even assisting in the discovery of her health condition. Jeongyeon expressed deep gratitude to her sister for being her pillar of strength, successfully returning to her career and health, while also humorously recalling their childhood sibling dynamics. - Jeongyeon successfully recovered from Cushing's syndrome with the dedicated support and care of her sister, Gong Seung-yeon. - The upcoming 'You Quiz on the Block' episode scheduled for the 20th features the sisters discussing their close bond and the challenges they faced during Jeongyeon's health downturn.