Cold abscess in the immunocompetent subject

Tuberculous cold abscesses are a rare and unusual form, accounting for 1% of extrapulmonary tuberculosis (TB). To describe clinical, diagnostic, therapeutic and prognostic aspects of cold tuberculous abscesses. Retrospective multicentre study of 26 patients followed for cold abscesses tuberculous in respiratory departments of AbderrahmenMami hospital between 2009 and 2017. We included 24 patients. Mean age was 36.9 years. Six patients had a personal history of pulmonary TB. Circumstances of the discovery were chronic pain (n = 15), parietal swelling (n = 7) and parietal fistulization (n = 2). The mean duration of the symptoms was 2.8 months. Fever was absent in 15 patients. The cold abscess was multifocal in 3 patients, associated with pleuropulmonary TB in 16 patients and extrapulmonary TB in 9 patients. Thoracic wall was the most frequent localization (n=13), followed by subcutaneous and intramuscular localization (n = 6). The surgical flattening of the abscess with biopsy of the edges was performed in 15 patients. The positive diagnosis was pathological in 15 patients and bacteriological in 12 patients. GeneXpert was positive in 2 patients. All patients received anti-tuberculosis treatment. The mean duration of TB was 10.7 months. Evolution was marked by the cure of 20 patients and tuberculous relapse in 1 patient after 6 months. Tuberculous cold abscess should be evoked in front of any chronique collection occurring especially in a context of risk factors of TB. Early diagnosis is the best guarantee of a cure without complications.