Osteoma cutis masquerading as an ingrowing toenail: a case report

Abstract

Osteoma cutis of the foot is extremely rare and there are very few reported cases. The incidence of in-growing toenail in the United Kingdom is estimated to be 10,000 new cases per year and many are treated non-operatively. We present a case where osteoma cutis was masquerading as an in-growing toenail, and wish to highlight the condition as a differential diagnosis for this condition. There have been case reports of bony cutaneous lesions of the foot, both benign and malignant and so these are especially important to consider in the differential diagnoses where non-operative management is being considered.

Ossifying pilomatricoma and a novel hypothesis for its pathogenesis

“…In particular, keratin in hair or nails may be associated with ossifying lesions of melanocytic nevi, [26,27] ingrown nails, [28] and pyogenic granulomas [29,30] . In melanocytic nevus with aberrant ossification, a foreign body reaction occurs in response to damaged hair follicles or free hair shafts [26,27] .…”

Osteoma cutis in the distal digit of the foot

“…The primary arises de novo on non-traumatic skin. The prevalence of this is less common than the secondary form, which can arise from any type of compromised skin, ranging from inflammatory reactions to neoplastic damage (3). Though some syndromes appear to be associated with osteoma cutis, including Albright's osteodystrophy, the true etiology of the condition remains unknown (4,5).…”

“…However, there are some reports of osteoma cutis occurring in the fingers and hands, with fewer reported in the feet. Those mentioned in the foot include presentations similar to those of verruca plantaris or heel pain (3,7). The first described osteoma cutis of the foot was by Coleman, who in 1894 reported on multiple lesions to the sole of the foot in a six year old child.…”

Periungual osteoma cutis – A rare occurrence

“…There are few case reports on OC lesions on the foot that can mimic verruca plantaris and may present with heel pain. [ 1 ] Periungual location of OC is rare and has not been reported. We report a rare case of periungual OC with its onychoscopic features in an Indian female.…”