What would doctors recommend, breast reconstruction with mastectomy or lumpectomy?

Very personal choice: Mastectomy has a lower risk of cancer recurrence than lumpectomy. Radiation is typically recommended following lumpectomy to decrease the recurrence risk. Radiation can alter the appearance of the "conserved" breast further so that significant breast asymmetry can be an issue. Mastectomy and immediate breast reconstruction can provide excellent cosmetic results but involves more surgery.

Both are equally goo: Lumpectomy is a breast saving procedure(as compared to mastectoy). But lumpectomy has to be combined with radiotherapy which is typically delived over a period of 6-7 weeks. So it is more inconveneint but you have your natural breast saved. The results in terms of cure/survival after treatment with either option are equally good.

Depends: Too many individual factors to give a blanket answer. Most time, radiation is added to lumpectomy patients and this can negatively affect subsequent reconstruction if needed. Both treatments are considered equal in terms or survival with a slight increase in local recurrence with lumpectomy.

Patient-Preference: Most breast cancers can be surgically treated with equal success by mastectomy or lumpectomy (+radiation). Therefore, given the option, most women choose the much less invasive rx of a lumpectomy. Many other issues may factor into this decision--age, family hx, mammogram findings, pathology, etc--therefore, a critical part of one's preoperative evaluation is to fine-tune this recommendation.