Q: What is Mackler's triad?

Answer:

It is not always presents but may be diagnostic of Boerhaave's syndrome (esophageal rupture)

• chest pain,
• vomiting and
• subcutaneous emphysema

Source:

Woo KM, Schneider JI (November 2009). "High-risk chief complaints I: chest pain--the big three". Emerg. Med. Clin. North Am. 27 (4): 685–712