2022, Number 3
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Dermatología Cosmética, Médica y Quirúrgica 2022; 20 (3)
Perineural invasion in cutaneous tumors
Díaz PLLA, Miller A, García RCA
Language: Spanish
References: 24
Page: 334-338
PDF size: 123.25 Kb.
ABSTRACT
Perineural invasion (PNI) represents the presence of neoplastic
cells surrounding nerves, involving all its covering layers. This
phenomenon is usually an incidental finding of cutaneous malignancies
affecting head and neck, and usually represents a
prognostic indicator of poor outcome. There are known risks
factors, including immunosuppression, radiation exposure, aggressive
histologic subtype, diameter and topographical anatomy.
Most patients are asymptomatic or have non-specific
symptoms like numbing or tingling; severe cases develop pain,
paresthesia or motor neurological deficits. The incidence of PNI
in basal cell carcinoma is 0.18-3%, in squamous cell carcinoma
2-5-5.95%, increasing to 14% in recurrent tumors. In microcystic
adnexal carcinoma PNI is found in 59%. Histopathological diagnosis
can be difficult in routine sections; Mohs micrographic
surgery allows full examination of the margins and it’s consider
the technique of choice, since it has shown to be superior compared
to standard excision.
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