The patient's course was complicated by jaundice due to rifampin and a draining sinus
tract at her knee that grew Staphylococcus aureus.
The lesion usually defies accurate identification on clinical grounds and can be mistaken for benign conditions, such as a foreign body granulomatous reaction, a draining sinus
, or an infected wart.
Deep dermal abscesses may join and progress to form chronically draining sinus
tracts colonized by mixed bacterial flora.
However, the concern arises due to the susceptibility to recurrent infection that may result in a chronic draining sinus
2) Uncommonly, the cyst may become secondarily infected, resulting in osteomyelitis with formation of an abscess and draining sinus
to the overlying skin.
of Princess Margaret Hospital for Children for assessment of tooth 41 and the possibility that this was associated with an external draining sinus
on her chin.