Zeineb Alaya, Walid Osman. A rare cause of digital clubbing: pachydermoperiostosis. PAMJ. 31 Dec 1969. 25(194)
Figure 1: A) thickening of the skin of the head and deep folds and furrows of the skin of the forehead; B) digital clubbing of fingers; C) digital clubbing of toes; D) periostosis of the long bones
