Eleven patients, with a mean age of 57 years, who had undergone radial fore
arm flap reconstruction following the excision of intraoral carcinoma, unde
rwent flap biopsy at a mean of 45 months postoperatively. Seven of the pati
ents had received postoperative radiotherapy. In eight patients the clinica
l appearance of the flap was similar in colour to that of adjacent normal o
ral mucosa; the remaining flaps retained the appearance of normal volar for
earm skin. Histological examination of the flaps showed varying degrees of
telangiectasia and mild chronic inflammation. In only two patients was supe
rficial infection by candida hyphae identified. Intraoral free flaps, altho
ugh clinically resembling oral mucosa, retain histological features of skin
, at least within the period under study. The erythematous clinical appeara
nce was not correlated with the presence of chronic fungal infection, but r
eflected the presence of vascular repair tissue, telangiectasia and mild re
sidual chronic inflammation. (C) 2001 The British Association of Plastic Su
rgeons.