[BitBucket user: Alain Mazy]
[BitBucket date: 2018-05-02.08:10:43]

this bug was previously part of [Issue 57](bug 57)

# Steps to reproduce #

- upload an instance from the ORTHO patient (attached),
- perform the following tools/find request:

```
#!python
curl 'http://localhost:8042/tools/find' --data-binary '{"Level":"Patient","CaseSensitive":false,"Query":{"AccessionNumber":"*","PatientBirthDate":"*","PatientID":"*","PatientName":"*O*","PatientSex":"*","StudyDate":"*","StudyDescription":"*"},"Limit":10,"Since":0}'

```
- the search returns no result because `PatientSex` is missing from the `ORTHO` patient

# additional info #
The spec is not clear about that: http://dicom.nema.org/medical/dicom/current/output/chtml/part04/sect_C.2.2.2.html We should also check how other tools behave in this case.