Differential Diagnosis for Grey Spot on Conjunctiva in a 4-year-old
- Single most likely diagnosis
- Conjunctival nevus: A benign growth on the conjunctiva, which can appear as a grey spot, especially in children. It's a common and usually harmless condition.
- Other Likely diagnoses
- Conjunctival melanosis: A condition characterized by an increase in melanin pigment in the conjunctiva, which can cause grey or brown spots.
- Foreign body: A small object, like dust or an eyelash, stuck under the eyelid can cause a greyish appearance on the conjunctiva.
- Pinguecula: A yellowish or greyish patch on the conjunctiva, often related to UV exposure or dry eyes.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Malignant melanoma: Although rare in children, it's crucial to rule out this potentially life-threatening condition, which can present as a grey or pigmented spot on the conjunctiva.
- Kaposi's sarcoma: A rare cancer that can affect the conjunctiva, especially in immunocompromised individuals, and may appear as a grey or purple lesion.
- Rare diagnoses
- Conjunctival lymphoma: A rare type of cancer that can affect the conjunctiva and may present as a grey or pinkish mass.
- Sjögren's syndrome: An autoimmune disorder that can cause conjunctival lesions, including grey spots, although it's more common in adults.
- Ocular melanocytosis: A rare condition characterized by an increase in melanin pigment in the eyes, which can cause grey or blue-grey spots on the conjunctiva.