In morbus caeruleus foramen ovole closes after: (A) 6 months, (B) 2 years, (C) 1 year, (D) Never
Answer is D. In few cases, foramen ovale remains patent throughout life and gives rise to cyanosis, a condition called as Morbus caeruleus.(Refer: Nelson's Textbook of Pediatrics, SAE, 1st edition, pg no. 2162)