Objective: Poland syndrome is rare, with an incidence o f 1 in 7,000­ 100,000 live births, and is characterized by unilateral chest wall defects due to hypoplasia or abscence o f pectoralis muscles, costal cartilages or ribs and brachy-syndactyly. Breast carcinoma and Leukaemia are rare associations. Osteoblastoma is a rare, solitary, benign bone-forming tu­ m our with a prevalence o f 1 % o f all bone tumours. Common sites are vertebral column (34 %), long bones (30 %) and ribs (<5 %).