Fig. 1From: Clinical significance of tumor-stroma ratio in head and neck cancer: a systematic review and meta-analysisHematoxylin and eosin-stained sections of oral squamous cell carcinoma. a: Tumor with a low proportion of stroma (< 50%). b: Tumor with a high proportion of stroma (≥ 50%) that associated with presence of tumor budding (i.e. small clusters of cancer cells) in a deeply invaded tumorBack to article page