Primary inoculation tuberculosis: a report of a rare entity

Area of Science:

• Dermatology
• Infectious Diseases
• Microbiology

Background:

• Primary inoculation tuberculosis (PIT) is an exogenous infection in individuals lacking prior immunity.
• PIT results from direct bacterial inoculation into the skin.
• This case highlights a rare presentation of cutaneous tuberculosis.

Observation:

• A 63-year-old male presented with symptoms suggestive of PIT.
• Diagnosis was based on clinical presentation and histopathological examination.
• Mycobacterial cultures did not yield positive results.

Findings:

• The patient was diagnosed with primary inoculation tuberculosis.
• Histopathology confirmed the diagnosis in the absence of positive cultures.
• Clinical appearance was a key diagnostic factor.

Implications:

• Emphasizes the diagnostic importance of clinical and histopathological findings in PIT.
• Highlights the challenges in diagnosing PIT when cultures are negative.
• Underscores the need for considering rare forms of tuberculosis in clinical practice.