Atypical fibroadenoma

Case: In the cytologic smears from a deeply located breast nodule in a 53-year-old female we found, besides the typical features of fibroadenoma, atypical cells suggesting carcinoma, with intranuclear indentations, nuclear molding, mitotic activity and intracytoplasmic vacuoles. Histologic examination confirmed the diagnosis of fibroadenoma, but marked ductal cell hyperplasia was also revealed Fibroadenoma (FA) is a common benign breast lesion frequently sampled by fine-needle aspiration biopsy (FNAB). Although the cytologic diagnosis is straightforward in most cases, cellular discohesion and atypia in FAs may lead to falsely atypical or positive FNAB diagnoses. Conversely, some adenocarc Summary and conclusion: The complicated giant fibroadenoma with an intra-lesional hemorrhage has characteristics of both benign and malignant lesions, and is difficult to distinguish by history and physical alone. Ultrasonography is a valuable tool yet the core needle biopsy remains the gold standard to confirm the diagnosis Fibroadenoma is the most frequent benign tumor of the breast, although its classification as a true benign tumor or as a mastopathy related to circulating estrogens is discussed today. They usually occur below 30 years and constitute 76% of breast masses between 10 and 20 years. Bilateralism has been reported between 12 and 16% of fibroadenomas Fibroadenomas may be involved by mammary neoplasia (e.g. invasive breast carcinoma, ductal carcinoma in situ, lobular carcinoma in situ) and atypical epithelial proliferations (e.g. atypical ductal hyperplasia, atypical lobular hyperplasia) often as a result of spread from an adjacent lesio

Background: Fibroadenoma is a benign mixed tumor composed of epithelial and non-epithelial components. The epithelial component of a fibroadenoma may exhibit proliferation, including lobular carcinoma in-situ, atypical ductal hyperplasia, DCIS and rarely, invasive breast carcinoma Re: Biopsy for atypical fibroadenoma Hello thanks for getting back to me. I had the biopsy on Friday afternoon -15th- an ultrasound guide core needle biopsy, local numbing, got to watch on the monitor as the radiologist inserted needle and removed tissue samples

Fibroadenoma is the most common type of benign breast tumor, and most don't increase your risk of breast cancer. Although women of any age can develop fibroadenomas, they usually occur in younger, premenopausal women. A fibroadenoma typically has a well-defined round or oval shape and a rubbery-feeling and is painless A fibroadenoma is a type of adenomatous breast lesion. It contains epithelium and has minimal malignant potential 8. Multiple fibroadenomas occur in 10-15% of patients. Patients with multiple fibroadenomas tend to have a strong family history of these tumors

Fibroadenoma is the most frequent benign tumor of the breast, although its classi fi cation as a true benign tumor or as a mastopathy related to circulating estrogens is discussed today. They usually occur below 30 years and constitute 76% of breast masses between 10 and 20 years. Bilateralism has been reported between 12 and 16% of fi broadenomas. The vast majority (77/80, 96%) of atypical fibroadenomas did not exhibit any evidence of infiltrative border with the exception of three cases showing focal infiltration (Fig. 1d). In benign.. The remaining 50 biopsy-proven fibroadenomas demonstrated one or more atypical signs of border irregularity, lobulation, inhomogeneous internal echo texture, or posterior shadowing. There were nine sonographic false positives: five patients had other benign lesions on histology, and four masses believed to be sonographically compatible with fibroadenoma were found to be carcinomas

Fibroadenomas (FAD) are mostly benign tumors consisted of both epithelial and stroma contents. They are usually noticed in young-aged women [ 1 ]. Those who are obese or gained weight (20-3 kg) within 18 years showed high risk of appearance of fibroadenoma Atypical ductal or lobular hyperplasia may be present. Carcinoma, in situ or invasive, may be present. May be lobular or ductal. Identify using standard criteria. Invasive carcinoma is present in adjacent breast in half of patients with in situ carcinoma in a fibroadenoma. Mean age of cases with carcinoma is in 40's We studied 49 patients with fibroadenomas with severe atypical epithelial hyperplasia, sometimes suggestive of in situ carcinoma. The term juvenile fibroadenoma (JFA) is recommended for these lesions, which occur mainly in adolescent and young women Pathology from the initial core needle biopsy showed complex fibroadenoma with atypical lobular hyperplasia (ALH). Two months later excisional biopsy was performed, revealing a small (0.4 cm) invasive lobular carcinoma adjacent to the fibroadenoma . The second patient was a 42-year-old woman.. Complex fibroadenomas are a fibroadenoma subtype harboring one or more complex features. We sought to evaluate the incidence of complex fibroadenoma on biopsy and to propose decision criteria for managing patients with these breast lesions

Breast fibroadenoma with atypical features: a case repor

Complex fibroadenomas are often smaller than simple fibroadenomas (1.3 cm compared with 2.5 cm in simple fibroadenomas). When histopathology on core biopsy reveals a higher-risk lesion, such as atypical lobular hyperplasia, excisional biopsy may be indicated to rule out malignancy. The clinical relevance is not clear Fibroadenoma is the most common benign breast tumor in women younger than age 30. They present most frequently between ages 20 and 50 with peak incidence reported at 20 to 24 years. 1 They account for 68% of all breast masses and a large proportion of breast biopsies. The presence of leftover remnants of the fibroadenoma also contributes to the variability in the structure of phyllodes tumors (Fig. 18-8). These fragments display the well-behaved structure of a fibroadenoma, and the organized pattern of these regions contrasts with the unruly appearance of the phyllodes tumor ADH is a benign breast condition linked to a moderate increase in breast cancer risk. If you have a core needle biopsy that discovers atypical cells, your doctor likely will go on to remove more of the tissue in that area. Since ADH is not a true cancer, though, there can be some variation in how doctors approach them

C, Histopathology of core needle biopsy reveals complex fibroadenoma with epithelial calcifications (dotted arrow) and adjacent atypical lobular hyperplasia (solid arrows). At subsequent excisional biopsy, atypical lobular hyperplasia was upgraded to invasive lobular carcinoma. BC In 20 patients, excisional biopsy was per Atypical Fibroxanthoma. AFX is one of the more recognizable skin cancers that can affect the body. It is characterized by the sudden development of a red or pink bump, nodule, or dome shaped ulcer. It is typically found on the head and neck of elderly patients with skin damage from over exposure to UV rays Atypia. Atypia is a word pathologists use to describe cells that look different from normal, healthy cells in that same location. Most fibroadenomas do not have any atypical cells. When atypical cells are seen in a fibroadenoma, they are usually fibroblasts in the stroma. However, the epithelial cells may also occasionally be atypical. Atypical. Some benign breast diseases, such as atypical hyperplasia, confer an increase in the patient's future risk of developing breast cancer and should lead to counseling about screening recommendations and risk reduction strategies

Fibroadenomas with atypia: causes of under- and

BACKGROUND: Fibroadenoma is a benign mixed tumor composed of epithelial and non-epithelial components. The epithelial component of a fibroadenoma may exhibit proliferation, including lobular carcinoma in-situ , atypical ductal hyperplasia, DCIS and The association between atypia within the fibroadenoma and atypia in the adjacent parenchyma was assessed using this group of patients. The association between internal and external atypia was assessed using a Fisher exact test with two-sided P values. 27 The association between normal, minimal atypia and true atypia and breast carcinoma was. Fibroadenomas of the Breast. Fibroadenomas are common benign (non-cancerous) breast tumors made up of both glandular tissue and stromal (connective) tissue. Fibroadenomas are most common in women in their 20s and 30s, but they can be found in women of any age. They tend to shrink after a woman goes through menopause Atypical fibroxanthoma (AFX) is a tumor that occurs primarily in older individuals after the skin of the head and neck has been damaged significantly by sun exposure and/or therapeutic radiation. Clinically, lesions usually are suggestive of malignancy because they arise rapidly (over just a few weeks or months) in skin in which other skin ca..

An atypical growth of a giant fibroadenoma after traum

Breast Cytopathology | CellnetpathologyAtypical papilloma reported as benign proliferative breast

Atypical Fibroadenoma Presentation of a Cas

  1. Any suspected fibroadenoma that is palpable or shows atypical features on clinical or imaging assessment requires pathological diagnosis with fine needle aspiration biopsy, core biopsy, or surgical excision. Because of the high proportion of fibrous tissue relative to epithelial tissue in fibroadenomas, fin
  2. Atypical hyperplasia is usually discovered after a biopsy to evaluate a suspicious area found during a clinical breast exam or on an imaging test, such as a mammogram or ultrasound. To further evaluate atypical hyperplasia, your doctor may recommend surgery to remove a larger sample of tissue to look for breast cancer
  3. al duct lobular unit.
  4. Fibroadenoma is a long-term risk factor for breast cancer. The risk is increased in women with complex fibroadenomas, proliferative disease, or a family history of breast cancer. Introduction.
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Pathology Outlines - Fibroadenom

FIBROADENOMA IN ORAL CONTRACEPTIVE USERS A Histopathologic Evaluation of Epithelial Atypia VIRGINIA A. LIVOLSI, MD, BRUCE V. STADEL, MD, MPH, JENNIFER L. KELSEY, PHD, AND THEODORE R. HOLFORD, PHD We have reviewed histologically a series of 120 fibroadenomas which forme The risk of invasive breast cancer is slightly increased (relative risk 1.3-2) for a proliferative lesion without atypia (complex fibroadenoma, moderate or florid hyperplasia, sclerosing adenosis, and intraductal papillomas)

A clinicopathological study of fibroadenomas with

  1. Essential features. Benign myofibroblastic proliferation simulating a vascular lesion. Usually an incidental finding but may produce palpable or mammographic mass. Complex interanastomosing spaces in dense collagenous, keloid-like stroma. Some of these spaces have spindle shaped myofibroblasts at their margins that simulate endothelial cells
  2. US is the modality of choice for characterizing and guiding biopsy of these lesions. Common benign causes of complex cystic masses include fibrocystic changes, intraductal or intracystic papilloma without atypia, and fibroadenoma. Atypical findings include atypical ductal hyperplasia, lobular neoplasia, and atypical papilloma
  3. Atypical findings include microlobulated or indistinct margins and acoustic shadowing due to internal calcification. In keeping with their histologic heterogeneity, fibroadenomas have been shown to have widely varied MRI appearances. On MRI, a fibroadenoma typically appears as an oval mass with smooth margins. It may have a lobular shape
  4. Complex fibroadenoma (approximately 3 times risk) Moderately increased risk (4 to 5 times) Atypical ductal hyperplasia (no family history) Atypical lobular hyperplasia; High risk (8 to 10 times) Ductal carcinoma in situ, low grade ; Lobular carcinoma in situ ; Atypical ductal hyperplasia, if history of carcinoma in primary relative
  5. Fibroadenoma (FA) is a benign breast lesion that occurs most commonly in premenopausal women, but it can occur in women at any age [].Several reports have described a higher risk of subsequent breast carcinoma among patients who have FA, with relative risks (RRs) ranging from 1.48 to 1.7 [1-5].At the tissue level, FA is a benign tumor composed of both epithelial and stromal components
  6. Proliferative FCC Without atypia With atypia 18. Fibroadenoma Most common benign tumor of female breast Seen in women of any age Circumscribed, freely movable, rubbery masses that result from both stromal and glandular proliferation 19

On ultrasonograms, fibroadenomas often demonstrate a typical appearance and may be distinguished clearly from cysts and carcinomas; however, fibrocystic disease with complicated hypoechoic cysts and, rarely, smooth carcinomas may mimic fibroadenoma. Atypical fibroadenomas, which are inhomogeneous or irregular in shape, may simulate carcinomas 2. Atypical hyperplasia. Atypical hyperplasia is when cells lining the ducts or lobules increase in number and also develop an unusual pattern or shape. 'Atypical' means 'not typical'. Atypical ductal hyperplasia (ADH) occurs in the ducts; atypical lobular hyperplasia (ALH) occurs in the lobules. Atypical hyperplasia is benign (not cancer) If a biopsy-proven simple fibroadenoma is Atypia and lobular carcinoma in situ: High-risk lesions of the breast View in Chinese Examples include if the radiologic target is a well-circumscribed mass and pathology shows a fibroadenoma with adjacent ALH,. Understanding Your Pathology Report: Atypical Hyperplasia (Breast) When your breast was biopsied, the samples taken were studied under the microscope by a specialized doctor with many years of training called a pathologist.The pathologist sends your doctor a report that gives a diagnosis for each sample taken

Cancer: Breast: Biopsy for atypical fibroadenom

  1. Some are atypical. ×. Courses Learn Difficult to distinguish from the common benign fibroadenoma with a cellular stroma. Most are benign but can grow quickly and to a very large size. 1 out of 10 is a malignant Phyllodes (acts and treated more like a sarcoma)
  2. Breast Fibroadenoma on Ultrasound. Ron Swanger, MD breast cancer, healthcare, mammography, Radiologist, Women's Imaging breast cancer, mammography, Radiology 1 Comment. Here is a fabulous example of a classic ultrasound appearance of a typical benign fibroadenoma, and an atypical fibroadenoma. If you have been told you have a fibroadenoma, you.
  3. Apocrine change within fibroadenoma is seen in approximately 10% of fibroadenomas. 25 Fibroadenomas having cysts over 3 mm, sclerosing adenosis, Atypical apocrine cells from fibrocystic change, and especially apocrine change in sclerosing adenosis, may be extremely difficult to distinguish from apocrine carcinoma..
  4. Atypical fibroxanthoma of the skin is a low-grade malignancy related to malignant fibrous histiocytoma, which it resembles histologically.: 613. Diagnosis Differential diagnoses. Squamous cell carcinoma; Malignant fibrous histiocytoma; Treatment. Surgical excision with clear margins. [citation.
  5. Fibrocystic breast disease, also termed Fibrocystic changes (FCC) is the general, all-inclusive term, for a whole range of common and benign breast disorders. The umbrella term, 'fibrocystic breast disease' includes all sort of benign conditions such as:-. Various types of cysts (that contain fluids

fibroadenoma) Cellular atypia Mild Absent (*stromal giant cells) Squamous metaplasia Rarely present Virtually absent. 5/23/2015 15 PITFALLS 1. Fibroadenomas may have focal leaf-like growth. 2. Phyllodes tumors may lack leaf-like growth. 4. Benign multinucleated stromal giant cells i Atypical hyperplasia is less common than usual hyperplasia. Women with atypical hyperplasia have about 3-5 times the breast cancer risk of women without a proliferative breast condition [ 183-186 ]. One study found women with atypical hyperplasia had about a 29 percent chance of developing breast cancer within 25 years [ 187 ] Atypical ductal hyperplasia (ADH) is not a form of breast cancer. Rather, it is a marker for women who may have a risk factor for developing breast cancer in the future. If you have a biopsy that shows atypical ductal hyperplasia in one of your breasts, your doctor will want to follow your breast health very carefully Summary. There are a number of benign conditions that can affect the breasts, including congenital anomalies (e.g., supernumerary nipples), fat necrosis, mastitis, fibrocystic changes, gynecomastia, mammary ductal ectasia, and neoplasms such as fibroadenoma, phyllodes tumor, and intraductal papilloma. Fibrocystic changes result in the most common benign lesion of the breast, and, like the rest. Forward to 3C on fibroadenomas. Back to 3A on cysts and other benign things. 3.4 Benign Epithelial Proliferations (Without Atypia) Proliferative breast disease without atypia and atypical ductal or lobular hyperplasia is associated with a greater breast cancer risk. The relative risk ranges from 1.3 to 1.9 (Hartmann et al. 2005)

fibroadenoma. There is no family history of breast cancer. Well-circumscribed mass (similar to fibroadenoma). High cellular smears with irregular groups and single atypical cells. The cells are large, pleomorphic with prominent nucleoli. Background rich in lymphocytes. Definitive diagnosis requires the demonstration of well defined borders Atypical ductal hyperplasia is considered a marker of increased risk of carcinoma rather than a precursor lesion Its presence in a core biopsy is an indication for excisional biopsy In an excisional biopsy, margins are not relevant if it is the only lesio Fibroadenoma (188 cases) was the most common benign neoplasm. In males, gynecomastia was the most common lesion (21 cases out of 27). The cytohistologic correlation was 89.7% for fibroadenoma, 65.2% for fibrocystic change, 60% for benign phyllodes tumor, 57.1% for fibroadenosis and 33.3% for breast abscess

Fibroadenoma - Breastcancer

Flat epithelial atypia Low magnification reveals variably dilated ducts, some with floccular secretions and phosphate type basophilic calcifications. The lining epithelium is monomorphic and appears to have multiple layers of cells with slightly enlarged (low nuclear grade) rounded nuclei Unlike radiation effect, fibroadenoma with bizarre stromal giant cells shows no epithelial or vascular abnormalities, the atypia is well-localized, and there is no history of radiation exposure. Fibroadenoma with bizarre stromal cells is an uncommon benign entity in the breast which can be easily confused with phyllodes tumor or other lesions.

Fibroadenoma (breast) Radiology Reference Article

Ductal hyperplasia (also called duct epithelial hyperplasia) is an overgrowth of the cells that line the small tubes (ducts) inside the breast, while lobular hyperplasia is an overgrowth of cell lining the milk glands (lobules). Ductal and lobular hyperplasia occur at about the same rate, and have about the same effect on breast cancer risk Histopathology Breast--Fibroadenoma Usual hyperplasia means there is excessive growth of benign cells in an area of the breast, but the cells don't look abnormal. This can happen along the inner lining of the breast duct (tube that carries milk to the nipple) or the lobule (small round sac that produces milk) An Atypical Growth of a Giant Fibroadenoma after Trauma Author links open overlay panel Ali Izadpanah MD, CM, MSc 1 Mihiran Karunanayake BSc 2 Arash Izadpanah MD, CM 3 Hani Sinno MD, CM, MEng 1 Mirko Gilardino MD, CM, FRCSC, FACS A complex fibroadenoma will not look organized and uniform like a simple one. Even though complex fibroadenomas don't become cancerous, they may contain a collection of small cysts, calcifications, enlarged breast lobules, papillomas and different kinds of hyperplasia. When atypical hyperplasia occurs, it can raise your risk of developing.

Fibroepithelial lesions of the breast: a comprehensive

  1. fibroadenoma with atypia. A 42-year-old member asked: can fibroadenoma be treated? Dr. Romeo Mandanas answered. 38 years experience Hematology and Oncology
  2. Fibroadenoma is the most common benign breast tumor in women. Most fibroadenomas form as a single tumor, and in an increased BI-RADS classification grade during the follow-up and core needle biopsy suggesting with atypical hyperplasia or suspected phyllodes tumor are also indications for surgical treatment. List of Compiling Committee.
  3. In other study also, increased cellularity, loss of cohesion, and nuclear atypia in aspirates from fibroadenoma, fibrocystic disease, and in intraductal papilloma led to erroneous interpretation . In other published reports also, epithelial proliferation of ductal/lobular hyperplasia accounted for false positive results [ 16 , 17 ]
  4. Atypical hyperplasia is a non cancerous (benign) condition. It's when the cells in the breast increase in number and also develop an unusual shape. The ducts spread from the lobes towards the nipple. Atypical hyperplasia can occur in the ducts (atypical ductal hyperplasia or ADH) or the lobules (atypical lobular hyperplasia or ALH)
  5. Like in the fibroadenoma, the epithelial component may display usual and atypical hyperplasia (both ductal and lobular), in situ and invasive carcinoma , with PASH more often encountered in the.

Only 2/8 cases thought to be PBD with atypia on cytology were confirmed to have atypical hyperplasia on histology. Scoring improved the diagnostic yield to 2/5. Hence, in cases of fibroadenoma or PBD, suspected on FNAC to have cytological atypia, Masood scoring gives additional information by eliminating benign cases and improving diagnostic yield Epithelial features (number of fragments, atypia, apocrine metaplasia, dissociation, and mitotic activity) did not show significant difference between fibroadenoma and phyllodes tumors in studies done by Deen et al. , Krishnamurty et al. , Bandyopadhayay et al. (Table 5). Similar findings were noted in our study but the presence of large opened. Fibroadenoma is a very common benign (not cancer) breast condition. The most common symptom is a lump in the breast which usually moves when you touch it. Fibroadenomas often develop during puberty so are mostly found in young women, but they can occur in women of any age

The spectrum of sonographic findings of fibroadenoma of

These cellular proliferations seem to us, on the microscopical point of view related to the atypical epithelial hyperplasias of the breast, and different from the in situ lobular carcinoma. Thus we propose to call these lesions variant of the breast fibroadenoma characterized by an atypical epithelial clear cell hyperplasia Any suspected fibroadenoma that is palpable or impalpable but shows atypical features on clinical or imaging assessment requires pathological diagnosis with fine needle aspiration biopsy, core biopsy, or surgical excision Rarely, atypical ductal hyperplasia, atypical lobular hyperplasia, ductal carcinoma in situ, lobular carcinoma in situ, and invasive carcinomas can involve a fibroadenoma. These patients are treated according to their high-risk, pre-cancer, or cancerous lesions. History and Physical. Age is the most important factor in the incidence of. A fibroadenoma is a type of noncancerous (benign) breast lump. Unless you have symptoms that bother you, treatment might not be needed. Goiter, Tertiary hyperparathyroidism, Hyperthyroidism, Thyroid cancer, Atypical hyperplasia of the breast, Cushing syndrome, MEN 2 ,.

Ultrasound Lexicon in diagnosis and management of breast

Fibroadenoma is a term that medics use to describe a broad range of solid, benign breast lesions that commonly affect premenopausal women.. Fibroadenomas often present as a palpable breast lump that might feel firm, smooth, rubbery or hard, perhaps like a pea or a grape.These breast lesions tend to be painless but will often move easily under the skin Juvenile Fibroadenoma High Grade Phyllodes Tumor; No stromal atypia : Atypical stroma : Stromal mitotic rate < 3/10 hpf : Elevated stromal mitotic rate : No stromal overgrowth : Stromal overgrowth : Does not infiltrate : May infiltrate surrounding breas Fibroadenoma Fibrosis Cysts Apocrine metaplasia Proliferative No atypia Papilloma Sclerosing adenosis Usual ductal hyperplasia 1.5-2x Proliferative with atypia Atypical Ductal Hyperplasia (ADH) Atypical Lobular Hyperplasia (ALH) 4-5x Ductal Carcinoma In-Situ (DCIS) Lobular Carcinoma In-Situ (LCIS) 8-10x Prolif Breast Disease W/O Atypi The terms atypical papilloma and atypical papillary lesion are used by many pathologists, radiologists, and other clinicians, Mammography shows a circumscribed mass with a smooth contour, similar to a fibroadenoma, sometimes containing indeterminate calcifications. Ultrasound shows a complex, semicystic appearance.. Atypical lobular hyperplasia (ALH) means that there is an overgrowth of abnormal-looking cells in one or more lobules, the breast's milk-producing sacs. However, there aren't enough of them for the condition to qualify as lobular carcinoma in situ (LCIS). Both ALH and LCIS are considered benign breast conditions linked to a moderate.

Printable - Fibroadenoma - Surgical Pathology Criteria

Fibroadenoma. Fibroadenomas are made up of connective and gland tissues. They are common in young women between 20 and 30 years of age. One or several fibroadenomas can occur, and they can develop in one or both breasts. But if there is a type of abnormal cell growth (called atypical hyperplasia), your risk may be slightly higher. Your risk. Complex fibroadenoma is a sub type of fibroadenoma harbouring one or more of the following features: epithelial calcifications papillary apocrine metaplasia sclerosing adenosis and cysts larger than 3 mm. They fall under the broad group of adenomatous breast lesions.. Complex fibroadenomas are often smaller than simple fibroadenomas (1.3 cm compared with 2.5 cm in simple fibroadenomas)

Juvenile Fibroadenoma with Atypical Epithelial Hyperplasia

Fibroadenoma. Fibroadenoma is the most common breast neoplasm, occurring in all age groups, but especially common in young women from 20 to 35 years of age. In contrast with the ill-defined nature of fibrocystic change, fibroadenomata are movable, discrete nodules, measuring usually less than 4 cm in maximum dimension The atypical cells in the fine-needle aspirate in this fibroadenoma corresponded to the metaplastic cells in the histologic sections. The cytologic and histologic features of these cells resembled those encountered in squamous Diagnostic Cytopuihology, Vol 8, No 3 metaplasia of the prostate and endocervix Proliferative Breast Disease with Atypia • Hyperplasia with atypia is present in ducts or lobules. • Moderately increased risk of carcinoma. 24. A) Atypical ductal hyperplasia with regularly spaced cells showing cribriform spaces. B) Atypical lobular hyperplasia 25. Fibroadenoma • Most common benign fibroepithelial tumor of female breast

A fibroadenoma is a very common benign (non-cancerous) breast condition. In a fibroadenoma, there is overgrowth of the tissue that supports the breast and overgrowth of the cells lining the milk ducts in the breast. In some cases, fibroadenomas may show very active or atypical cells on a biopsy. Fibroadenomas with atypical cells will. Still, the best way to treat flat epithelial atypia is not clear. If your biopsy showed flat epithelial atypia, the best thing to do is to talk with your doctor about it. What if my report says fibroadenoma, fibroepithelial lesion, or phyllodes tumor? Fibroadenoma is the most common benign (non-cancerous) tumor in the breast. If it is diagnosed. Microscopic examination of the intraductal fibroadenoma or intraductal phyllodes tumor of the breast A: Low-power view shows that its polypoid parts are composed of leaf-like processes with a hypocellular and prominent myxoid stroma protruding into cystic spaces, reminiscent of intracanalicular type fibroadenoma or benign phyllodes tumor features (H&E stains)