An Asymptomatic Case of Invisible Mycosis Fungoides

Area of Science:

• Dermatopathology
• Oncology
• Immunohistochemistry

Background:

• Mycosis fungoides can present as an 'invisible' form, detected histopathologically in normal-appearing skin.
• Asymptomatic presentations of mycosis fungoides are infrequently reported on biopsies of individual lesions.

Observation:

• A case of mycosis fungoides was diagnosed on a re-excision specimen of an atypical melanocytic nevus.

Findings:

• The diagnosis was confirmed using immunohistochemical studies and T-cell receptor gene rearrangement.
• This represents a rare instance of both invisible and asymptomatic mycosis fungoides.

Implications:

• Highlights the necessity of thorough histopathologic examination of all tissue specimens.
• Emphasizes the importance of considering mycosis fungoides in differential diagnoses, even in asymptomatic and seemingly normal skin.
• Underscores the value of advanced diagnostic techniques in confirming rare oncologic findings.