DIAGNOSTIC PRODUCTS CORP
EXHIBIT 10.1
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<DESCRIPTION>EXHIBIT 10.1
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<P align="center"><FONT size="2"><B>EXHIBIT 10.1</B></FONT>

<P align="center"><FONT size="2">SECOND ADDENDUM TO STANDARD INDUSTRIAL LEASE</FONT>

<P><FONT size="2">Lessee extends the lease for a period of two years beginning on January&nbsp;1, 2003
and ending on December&nbsp;31, 2005.
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<P><FONT size="2">The rent per month for this extension shall be $86,250.00.
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<P><FONT size="2">Lessee shall have an option to extend the lease an additional two years beyond
December&nbsp;31, 2005 at a rent per month of $90,562 by providing notice to the
Partnership not later than November&nbsp;1, 2005.
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<P><FONT size="2">This rider to the lease is dated April&nbsp;1, 2002 and between lessors by Michael
Ziering, general partner, 5700 West 96th Street Partnership, and by James
Brill, VP Finance and CFO of Diagnostic Products Corporation.
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        <TD valign="top"><FONT size="2">James Brill<BR>
Diagnostic Products Corporation<BR>&nbsp;<BR>
Dated: April&nbsp;1, 2002</FONT></TD>
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Michael Ziering<BR>
5700 West 96th Street<BR>
Partnership<BR>
Dated: April&nbsp;1, 2002</FONT></TD>
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<P align="center"><FONT size="2">13</FONT>

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