[Solitary mast cell tumor. A case comunication].

Area of Science:

• Dermatology
• Oncology

Background:

• Solitary cutaneous mastocytoma is a rare skin condition, a subtype of cutaneous mastocytosis.
• It typically presents in infancy but can occur at any age.
• Lesions are often red-brown and may be asymptomatic or cause histamine release symptoms.

Observation:

• A 19-year-old female presented with a recently developed, growing pigmented lesion.
• The lesion was located in the left antecubital fold and was asymptomatic.
• Dermoscopy revealed a fine, symmetrical network with yellowish-brown hues and scattered black dots.

Findings:

• Pathology and immunohistochemistry confirmed the diagnosis of mast cell tumor.
• The case highlights an atypical presentation of solitary cutaneous mastocytoma in an adult.

Implications:

• Solitary cutaneous mastocytoma should be considered in adult differential diagnoses.
• Awareness of atypical clinical and dermoscopic features is crucial for accurate diagnosis.
• Early diagnosis can guide appropriate management and prognosis assessment.