Can red tattoos harbor keratoacanthoma?

A rapidly growing forearm nodule developed within weeks of tattoo placement, adding to previous reports of tumors arising in red pigment.

Category	Detail
Condition	Keratoacanthoma arising within tattoo pigment
Key Mechanisms	The mechanism underlying the reported association with red tattoo pigment is not established; degradation of red azo pigments has been proposed as a possible contributor.
Target Population	People with tattoos, including those with a rapidly growing lesion within tattoo pigment.
Care Setting	Dermatologic assessment and surgical excision of a solitary keratoacanthoma, as described in the case report.

A 61-year-old woman developed an 8-mm crateriform nodule within red pigment of a forearm tattoo placed 2 months earlier.
The lesion had grown rapidly over 6 weeks and had a central hyperkeratotic plug.
Excision showed histopathologic features consistent with keratoacanthoma and red tattoo pigment deposits within the tumor epithelium.
Previously published reports identified 42 tattoo-associated keratoacanthomas and squamous cell carcinomas; 75% arose within red pigment.
The case and cited literature do not establish tumor incidence among tattooed people or a causal relationship with red pigment.

Histopathologic examination of the excised lesion showed an inflamed squamous lesion with crateriform growth and glassy features, consistent with keratoacanthoma.

The study authors identified surgical excision as first-line treatment for solitary keratoacanthomas.

The report did not provide longitudinal follow-up or monitoring recommendations.

The proposed association with red pigment is based on previously reported cases involving both keratoacanthomas and squamous cell carcinomas.
The mechanism is incompletely understood, and the evidence does not establish causation or incidence.

A single 61-year-old female patient with a rapidly growing lesion within red forearm tattoo pigment.

The lesion was surgically excised. The report provides no comparative treatment data or longitudinal follow-up.

Assess and investigate a rapidly growing crateriform nodule arising within tattoo pigment; the reported diagnosis was established by histopathologic examination.
For a solitary keratoacanthoma, the study authors identified surgical excision as first-line treatment.
Interpret the reported predominance in red pigment cautiously: the cited cases included both keratoacanthomas and squamous cell carcinomas and do not establish causation.