Intramucosal Melanocytic Nevi – A Rare Cause for Gingival Enlargement. Report of a Case and Review of Literature

Figures & data

Figure 1 Pre-operative photograph of gingival enlargement.

Figure 2 OPG and CBCT images showing minimal bone loss in the labial plate beneath the gingival overgrowth (A–D).

Figure 3 (A) Immediate Post-operative photograph after surgical excision of the lesion. (B) Collagen sponge dressing sutured over the surgical excision site. (C) One-month post-operative photograph showing a well healed surgical site.

Figure 4 H&E-stained section (100x) which shows the proliferation of nevus cells, with junctional separation and differentiation of lesional cells. Yellow arrow points to type A cells and blue arrow points to type B cells.

Figure 5 (A) Preoperative and (B) one-year post-operative photograph, showing a focal area of hyper-pigmentation.

Table 1 Distribution of Incidence Percentage of Oral nevus¹¹

Site of the Nevus	Percentage of Incidence
Hard palate	42%
Buccal mucosa	17%
Retromolar pad	11%
Gingiva	8%
Vermilion border	8%
Soft palate	8%
Labial mucosa	3%
Tongue	3%

Buchner A, Hansen LS. Pigmented nevi of the oral mucosa: a clinicopathologic study of 36 new cases and review of 155 cases from the literature. Part I: a clinicopathologic study of 36 new cases. Oral Surg Oral Med Oral Pathol. 1987;63(5):566–572. PMID: 3473378. doi:10.1016/0030-4220(87)90229-5

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