What is the most likely diagnosis given tearing, tenderness, edema, and redness at the medial canthal area of the lower lid?

What is the most likely diagnosis given tearing, tenderness, edema, and redness at the medial canthal area of the lower lid?

• A. Dacryocystitis
• B. Conjunctivitis
• C. Blepharitis
• D. Stye

Answer: (A)

Tearing, tenderness, edema, and redness localized to the medial canthal area point to infection or inflammation of the lacrimal sac, i.e., dacryocystitis. The lacrimal sac sits at the inner corner of the eye, near the nasolacrimal duct, so obstruction of tear drainage leads to epiphora and infection with swelling and erythema in that specific region. This presentation contrasts with conjunctivitis, which typically shows diffuse eye redness and discharge; blepharitis, which primarily involves the lid margins with crusting; and a stye, which is a painful lump at the eyelid margin from Meibomian gland involvement. Thus, the medial-canthal findings best fit acute dacryocystitis.

Tearing, tenderness, edema, and redness localized to the medial canthal area point to infection or inflammation of the lacrimal sac, i.e., dacryocystitis. The lacrimal sac sits at the inner corner of the eye, near the nasolacrimal duct, so obstruction of tear drainage leads to epiphora and infection with swelling and erythema in that specific region. This presentation contrasts with conjunctivitis, which typically shows diffuse eye redness and discharge; blepharitis, which primarily involves the lid margins with crusting; and a stye, which is a painful lump at the eyelid margin from Meibomian gland involvement. Thus, the medial-canthal findings best fit acute dacryocystitis.