The name of the illness is apparently made from the word "scrofula" (the former name of tuberculous cervical lymphadenitis, a type of tuberculous that normally infects the neck), and "fungus". If the name is chosen intentionally to indicate the nature of this disease, the disease is most likely a type of fungus infecting the neck.
Behind the scenes
- The Wizard's Challenge asks whether it is this, Vanishing sickness, Dragon Pox or another illness that proved fatal for Abraxas Malfoy; thus, this may be fatal.
- Harry Potter and the Order of the Phoenix (First mentioned)