Correct answer:

(1) Perforation by a foreign body.
(2) Patent vitellointestinal duct.
(3) Peptic ulceration.
(4) Raspberry tumour at the umbilicus.
(5) Intussusception (ileoileal).
(6) Vitellointestinal band volvulus.
(7) Acute inflammation.
(8) Symptomless finding.