| Description | International classification of diseases / oncology, morphological part for typing of benign and malignant tumors.<br clear="none" /><br clear="none" />
<p style="margin: 0px 20px 18px 0px; padding: 0px; border: 0px; outline: 0px; font-family: Helvetica, Arial, sans-serif; vertical-align: baseline; line-height: 18px; color: rgb(51, 51, 51);"><span style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-style: inherit; font-family: inherit; vertical-align: baseline;">The morphology axis provides five-digit codes ranging from M-8000/0 to M-9989/3. The first four digits indicate the specific histological term. The fifth digit after the slash (/) is the behaviour code, which indicates whether a tumour is malignant, benign, in situ, or uncertain (whether benign or malignant).<br clear="none" /></span><span style="font-family: inherit; font-style: inherit;">A separate one-digit code is also provided for histologic grading (differentiation).</span>
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