<prompt> During DCR surgery, an osteotomy was done in the anterior and superior region. Which area does it accidentally open into?Anterior Ethmoidal SinusMaxillary AntrumSuperior MeatusMiddle Meatus  <response>: COMPLICATIONS OF CONVENTIONAL EXTERNAL DACRYOCYSTORHINOSTOMY: Persistent or recurrent tearing most common complication Bleeding following an infratrochlear block due to damage of anterior ethmoidal aery 2nd most common complication Post-operative subcutaneous or subperiosteal hematoma near the incision site. CSF leak as a rare complication Postoperative infections requiring prophylactic antibiotics Secondary failure of DCR due to rhinostomy closureinsufficient size of osteotomy mitomycin c improves success rates Osteotomy opening into anterior ethmoidal air cells in 46 of DCR surgeries 