Hi. Case 1: it is an endometriosis, because pelvic pain appears with menses. The treatment would be contraceptives to try to reduce the mass and if that doesn´t happen it should be operated.
Case 2: Brucellosis
The diagnosis is based on the fact that brucellosis is an occupational disease of caregivers, veterinarians and those who work in matansa halls. The symptoms are undulant fever, myalgias and arthralgias. The tests to be performed include complete hematology. Blood culture, RP, PLT, 2ME, CT. Treatment includes doxycycline associated with rifampicin.
You are in order @elvigia. What are your differential diagnosis for both cases? And why would you not stick your neck for them?
Case 1: It is not an ectopic pregnancy because it said that it was repeated every month, that is, the pelvic pain appears with each menstruation. in any case I would do a pregnancy test or human gonadotrophin levels.
In Case 2, the differential diagnoses would be Lyme disease, but they do not mention skin lesions in the description. it occurs more in wooded regions, but I don´t know the region where the patient lives.