Calvarial osteomyelitis and intracranial extension post-Mohs micrographic surgery

Mohs micrographic surgery (MMS) is a specialised micrographic technique used for the treatment of locally invasive skin cancers. Despite being a relatively low risk surgery, the overall complication rates range between 1.6% and 3%. Common complications include postoperative haemorrhage, haematoma formation, wound infection, wound dehiscence and flap/graft necrosis. Osteomyelitis after dermatological cancer surgery is exceedingly rare. There have only been two cases of osteomyelitis in association with Mohs surgery reported in the literature to date. Here, we describe an epidemiologically atypical patient who initially presented with fever and altered mental status and later found to have calvarial osteomyelitis, intracranial abscess (empyema) and meningoencephalitis as a result of Mohs surgery. Although rare, it is a predictable side effect postsurgery, and prevention of such complications are critical to decrease morbidity and mortality in patients undergoing MMS.

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