Ciao, sto cercando di creare una tabella in HTML, ma non mi viene come desidererei...sapreste dirmi cosa sto sbagliando?

codice HTML:
<table style="height: 100%; border-color: #B0B0B0; border-collapse: collapse;" border="1" cellpadding="5">
<tbody>
<tr>
<td style="text-align: center;" colspan="6" bgcolor="#ccccff">Abdominal Pain</td>
</tr>
<tr>
<td style="border-bottom: 0px"></td>
<td colspan="4"></td>
<td style="border-bottom: 0px"></td>
</tr>
<tr>
<td style="border-bottom: 0px; border-top: 0px" colspan="3"></td>
<td style="border-bottom: 0px; border-top: 0px" colspan="3"></td>
</tr>
<tr>
<td style="border-top: 0px" colspan="2"></td>
<td rowspan="2" colspan="2"></td>
<td style="border-top: 0px" colspan="2"></td>
</tr>
<tr>
<td style="border-bottom: 0px" colspan="2"></td>
<td style="border-bottom: 0px" colspan="2"></td>
</tr>
<tr>
<td style="border-bottom: 0px" colspan="3"></td>
<td style="border-bottom: 0px" colspan="3"></td>
</tr>
<tr>
<td style="border-top: 0px" colspan="2"></td>
<td colspan="2"></td>
<td style="border-top: 0px" colspan="2"></td>
</tr>
</tbody>
</table>
Vorrei che uscisse senza le linee crocettate di rosso...

Grazie

Schermata 2016-11-17 alle 16.20.34.png