Table 3 Comparison of clinical and ocular features among different histologic subtypes of conjunctival pigmented lesions.

   Superior

2 (3.5)

0 (0.0)

0.069^a

   Nasal

12 (21.1)

12 (42.9)

   Inferior

1 (1.8)

0 (0.0)

   Temporal

33 (57.9)

9 (32.1)

   Multiple

9 (15.8)

7 (25.0)

   Bulbar conjunctiva

47 (82.5)

18 (64.3)

0.163^a

   Caruncle

3 (5.3)

4 (14.3)

   Tarsal conjunctiva

0 (0.0)

0 (0.0)

   Fornix

1 (1.8)

0 (0.0)

   Multiple

6 (10.5)

6 (21.4)

   Temporal conjunctiva

31 (54.4)

9 (32.1)

0.053^b

   Temporal bulbar conjunctiva

29 (50.9)

9 (32.1)

0.103^b

Feeder vessel, No. eyes (%)

56 (98.2)

22 (78.6)

0.005^a

Malignant melanoma

Non-malignant melanoma

P value

   Bulbar conjunctiva

1 (16.7)

64 (81.0)

0.002^a

   Extra-bulbar conjunctiva

5 (83.3)

15 (19.0)

   1 or 2 Quadrant(s)

1 (16.7)

70 (88.6)

<0.001^a

   3 or 4 Quadrants

5 (83.3)

9 (11.4)

Size, mm

(Mean ± SD, range)

17.0 ± 6.7

(9.0–24.0)

6.7 ± 6.0

(1.5–42.0)

<0.001^c

Malignant melanoma

Compound nevus

P value

   Bulbar conjunctiva

1 (16.7)

47 (82.5)

0.002^a

   Extra-bulbar conjunctiva

5 (83.3)

10 (17.5)

   1 or 2 Quadrant(s)

1 (16.7)

50 (87.7)

0.001^a

   3 or 4 Quadrants

5 (83.3)

7 (12.3)

Size, mm

(Mean ± SD, range)

17.0 ± 6.7

(9.0–24.0)

7.2 ± 6.8

(1.5–42.0)

<0.001^c

C-MIN^d

Compound nevus

P value

   Bulbar conjunctiva

10 (100.0)

47 (82.5)

0.337^a

   Extra-bulbar conjunctiva

0 (0.0)

10 (17.5)

   1 or 2 Quadrant(s)

9 (90.0)

50 (87.7)

1.000^a

   3 or 4 Quadrants

1 (10.0)

7 (12.3)

Size, mm

(Mean ± SD, range)

6.3 ± 3.2

(3.0–14.0)

7.2 ± 6.8

(1.5–42.0)

0.804^c