Which is not a common cause of angioedema without urticaria?

Correct Answer: C

Rationale: Foods are less commonly associated with angioedema without urticaria compared to ACE inhibitors, hereditary angioedema, and insect stings.

Correct Answer: B

Rationale: Cephalohematoma does not extend across suture lines due to the periosteal attachment. The other statements are true regarding cephalohematoma.

Correct Answer: C

Rationale: Achondroplasia is a genetic disorder caused by a mutation in the FGFR3 gene, not a chromosomal abnormality. Prader-Willi syndrome, X-linked hydrocephalus, and Treacher Collins syndrome are chromosomal or genetic disorders.

Correct Answer: C

Rationale: NSAIDs are common causes of fixed drug eruptions, which present as recurring skin lesions at the same site.

Correct Answer: D

Rationale: Large atrial septal defects do not cause turbulent flow near valves or endocardial surfaces, making them less prone to infective endocarditis compared to other defects like VSD, which promote bacterial seeding.