Congenital Giant Cellular Blue Nevus Resulting in Dystocia

Signet‐ring cell colon cancer in a 19‐year‐old patient with giant congenital cellular blue nevus of the scalp

“…These rare lesions may be quiescent 2 or may undergo malignant transformation 3 and warrant early surgical excision 4 when possible. They have been reported to present as dystocia, 5 obstruction, 6 and melanoma mimicks 7 . Our patient with GCCBN developed invasive colon cancer at 19 years of age, a both rare and unusual presentation.…”

Firm Black Exophytic Tumor on the Foot of a Black Child

“…In most reports of large blue nevi, the lesions were located on the scalp (14)(15)(16)(17)(18). Histologically, the common blue nevus is characterized by a wavy pattern of melanocytes interspersed between collagen fibers in the mid and upper dermis, and by cytoplasmic dendrites laden with melanosomes (7).…”