List of contributors; Preface; 1. Occam's razor through the neuroaxis; 2. Between the head and the heart; 3. Thinking laterally; 4. No laughing matter; 5. Unusual cause for an expanding head circumference in a neonate; 6. No hard feelings; 7. The masquerader; 8. An old enemy; 9. A Vietnamese child who is floppy and falling; 10. Disseminated in time and space; 11. Double trouble; 12. Hiking into danger; 13. A runny nose, running into trouble; 14. An undulating fever; 15. Headache and fever after a safari; 16. Sent home with a pain in the ear; 17. Relapsing infection and a spelling bug; 18. Scratching the surface; 19. Cloudy with a chance of cytokine storms; 20. Ter-wit-ter-woo!; 21. Same family, different genus, new problem?; 22. The great pretender; 23. Word salad; 24. A mildly unwell mother delivers a very unwell baby; 25. A creeping weakness; 26. Preventable cause of peripheral neuropathy; 27. It's in the genes; 28. Sutton's law; 29. 'No milk for me please'; 30. More than mononucleosis: a familial or reactive risk?; 31. Return of an old foe; 32. The lethal masquerader; 33. Bitten in the Hampshires; 34. Is it all to do with his glands doctor?; 35. A recurring pain in the neck; 36. A new case of history repeating itself?; 37. Feeling a little light-headed; 38. A rare cause of coma that could run in the family; 39. A travelling salesman, slowing down; 40. A nasty, rare, and ironic unwanted effect; 41. A rash diagnosis; 42. Seizure in a seasoned traveller; 43. Stiff and stuporous; 44. Just unlucky or is some detective work needed?; 45. A case of missing the point; 46. Have I got a monster in my body?; 47. Not quite so reserved anymore; 48. Thought we had seen the last of this?; 49. Sick as a swine; 50. A tic in the (voice) box; 51. A forgotten itch; 52. Brain on fire; 53. Fitting and febrile – getting complicated; 54. A pain in the leg; 55. A wobbly toddler; 56. Popping problems; 57. A bad headache and an awkward eye; 58. Drowsy with difficulty swallowing; 59. Two types of shaking; 60. Diagnosing a headache: follow your gut feeling; 61. Floppy and falling when back home; 62. Big game; 63. A Busse–Buschke secret; 64. Tied in a knot; 65. Twitchy and twitching; 66. An itchy problem.