[Sarcomatoid mesothelioma--a diagnostic challenge].

: This is the case of a 62-year-old carpenter in whom a computed tomography showed a widespread "mesothelioma-like" tumour of the pleura. Needle biopsy and later autopsy showed malignant sarcomatoid tumour. The tumour stained negatively for calretinin and other "mesothelial markers". Diagnosis has important legal implications for the relatives, we therefore find it important to stress that sarcomatoid mesothelioma is usually calretinin-negative.