Benign fat necrosis simulating bilateral breast malignancy after reduction mammoplasty

Benign breast lesions detected by positron emission tomography-computed tomography

(18)F-fluorodeoxyglucose positron emission computed tomography (FDG PET-CT) is widely used in the initial staging and response evaluation of patients with malignancy. This review describes a spectrum of benign breast findings incidentally detected by FDG PET-CT at staging that may be misinterpreted as malignancy. We describe the pattern of distribution and intensity of FDG uptake in a spectrum of benign breast diseases with their corresponding typical morphological imaging characteristics to help the nuclear medicine physician and/or general radiologist identify benign lesions, avoiding unnecessary breast imaging work-up and biopsies.

What we should know in mammography after reduction mammoplasty and mastopexy?

BACKGROUND

Reduction mammoplasty and mastopexy (breast lift surgery) are becoming increasingly common procedures. Knowledge of characteristic mammographic findings and imaging findings of breast cancer are important to interpret mammography in this population.

METHODS

Patients undergoing a mammography examination between March 2006 and March 2012 were consecutively included. Seventy mammography examinations in 39 patients after reduction mammoplasty and 22 mammography examinations in 19 patients after mastopexy were reviewed and analyzed retrospectively. We compared the frequency of each characteristic mammographic finding between reduction mammoplasty and mastopexy. We also analyzed imaging findings of breast cancer in this population.

RESULTS

The most frequent mammographic finding of the reduction mammoplasty was nipple elevation (84.3 %). Other findings included retraction of the lower breast (80 %), thickening of the skin (78.6 %), downward shifting of the glandular tissue (47.1 %), retroareolar fibrotic band (42.9 %), and areolar skin calcification or lipid cyst (35.7 %). The most frequent mammographic finding of mastopexy was thickening of the skin (72.7 %). Other mastopexy findings included elevation of nipple (68.2 %), areolar skin calcification or lipid cyst (36.4 %), retraction of lower position (31.8 %), and retroareolar fibrotic band (31.8 %). Downward shifting of glandular tissue and retraction of the lower portion have statistically lower frequency in mastopexy cases (P < 0.05). Two breast cancers were diagnosed in reduction mammoplasty cases. One was missed and one was detected but difficult to diagnose using mammography.

CONCLUSION

Although mammography alone is not sufficient for breast screening after reduction mammoplasty, it may be possible to use mammography for postoperative follow-up after mastopexy only. So, operators should recognize that after reduction mammoplasty it will be hard to detect early breast cancer.

Fat necrosis may mimic local recurrence of breast cancer in FDG PET/CT

Fat necrosis of the breast is a benign condition that most commonly occurs as the result of trauma. The radiographic and clinical significance of fat necrosis of the breast is that it may mimic malignancy. We present a case of false positive FDG PET/CT scan caused by fat necrosis and mimics local recurrence of breast carcinoma 3 years after radical mastectomy. Physicians must be aware of fat necrosis as a potential pitfall for PET/CT. Fat necrosis must be considered in the differential diagnosis of hypermetabolic breast masses in patients who previously had mastectomy or mammoplasty.

Idiopathic granulomatous lobular mastitis

Idiopathic granulomatous lobular mastitis (IGLM) is a rare breast condition with prominent skin findings. It is typically seen in young parous women. Painful breast masses, draining sinuses, scarring, and breast atrophy are the main clinical manifestations. IGLM can resemble a variety of other inflammatory and neoplastic processes of the breast. It is thought to result from obstruction and rupture of breast lobules. Extravasated breast secretions then induce an inflammatory reaction. Corynebacteria have also been implicated in the pathogenesis. Treatment is surgical, but systemic corticosteroids, methotrexate, and antibiotics also play a role.

Spectrum of sonographic findings in superficial breast masses

OBJECTIVE

The purpose of this presentation is to show the sonographic findings of breast masses, which can occur in subcutaneous fat or in the cutaneous layer of the breast.

METHODS

We reviewed the sonographic findings of superficial breast masses, including the epidermal inclusion cyst, steatocystoma multiplex, fat necrosis, accessory breast, Mondor disease, sparganosis, neurofibroma, tuberculosis, mastitis, and breast malignancy.

RESULTS

Specific sonographic features of superficial breast masses have been illustrated.

CONCLUSIONS

Radiologists must be familiar with the sonographic findings of various diseases involving the superficial layer of the breast to avoid further patient workup.

A case of fat necrosis after breast quadrantectomy in which preoperative diagnosis was enabled by MRI with fat suppression technique

A 63-year-old woman was found to have a left breast mass after quadrantectomy and radiation for bilateral breast cancer on postoperative cyclic examination. Intramammary recurrence could not be excluded by physical examination, mammography, or ultrasound examination. MR imaging with fat suppression technique revealed an oil-containing lesion, indicating fat necrosis. It was confirmed histologically that the mass-forming lesion included no cancer tissue. MR imaging with fat suppression technique appears to be a promising method for identification of postoperative mass lesions of the breast.

Management of breast carcinoma identified intraoperatively during reduction mammaplasty

Before reduction mammaplasty, patients should be assessed for breast cancer risk and evaluated with physical examination and mammography. Patients determined to be at increased risk should be informed of the possibility of occult breast carcinoma and the potential treatment options. Intraoperative discovery of an occult carcinoma may allow for breast conservation therapy under certain circumstances if an appropriate biopsy sample is taken from the tumor and if clear margins are obtained.