Which color line corresponds to the cyst of the maxillary tuberosity extending into the maxillary sinus?

• A. Light Blue Line
• B. Red Line
• C. Purple Line
• D. Green Line

Answer: (B)

Understanding how a lesion grows in relation to the maxillary sinus helps interpret radiographs. The maxillary tuberosity sits just behind the molars, near the floor of the maxillary sinus. A cyst here tends to extend into the sinus, creating a radiolucent area that continues from the tuberosity into the sinus cavity. The red line traces exactly that connection—from the tuberosity into the sinus—so it best represents the cyst extending into the maxillary sinus. The other colors don’t show this seamless extension into the sinus, so they don’t match the described pathology.