Phyllodes tumor

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Maria Fernanda Villarreal, M.D. [2]

Synonyms and keywords: Cystosarcoma phyllodes;

Overview

Phyllodes tumor (also known as cystosarcoma phyllodes), is a typically large, fast-growing mass that arises from the periductal stromal cells of the breast. Phyllodes tumors account for less than 1% of all breast neoplasms.

Historical Perspective

• Phyllodes tumor was first discovered by [scientist name], a [nationality + occupation], in [year] during/following [event].

Classification

• Phyllodes tumor may be classified according to [classification method] into [number] subtypes/groups:

• [group1]
• [group2]
• [group3]

• Other variants of phyllodes tumor include [disease subtype 1], [disease subtype 2], and [disease subtype 3].

Pathophysiology

• The pathogenesis of phyllodes tumor is characterized by [feature1], [feature2], and [feature3].
• The [gene name] gene/Mutation in [gene name] has been associated with the development of phyllodes tumor, involving the [molecular pathway] pathway.
• On gross pathology, [feature1], [feature2], and [feature3] are characteristic findings of phyllodes tumor.
• On microscopic histopathological analysis, [feature1], [feature2], and [feature3] are characteristic findings of phyllodes tumor.

Causes

• Phyllodes tumor may be caused by either [cause1], [cause2], or [cause3].
• Phyllodes tumor is caused by a mutation in the [gene1], [gene2], or [gene3] gene[s].
• There are no established causes for phyllodes tumor.

Differentiating Phyllodes Tumor from Other Diseases

• Phyllodes tumor must be differentiated from other diseases that cause [clinical feature 1], [clinical feature 2], and [clinical feature 3], such as:

• [Differential dx1]
• [Differential dx2]
• [Differential dx3]

Epidemiology and Demographics

• The prevalence of phyllodes tumor is approximately [number or range] per 100,000 individuals worldwide.
• In [year], the incidence of phyllodes tumor was estimated to be [number or range] cases per 100,000 individuals in [location].

Age

• Patients of all age groups may develop phyllodes tumor.

• Phyllodes tumor is more commonly observed among patients aged [age range] years old.
• Phyllodes tumor is more commonly observed among [elderly patients/young patients/children].

Gender

• Phyllodes tumor affects men and women equally.

• [Gender 1] are more commonly affected with phyllodes tumor than [gender 2].
• The [gender 1] to [Gender 2] ratio is approximately [number > 1] to 1.

Race

• There is no racial predilection for phyllodes tumor.

• Phyllodes tumor usually affects individuals of the [race 1] race.
• [Race 2] individuals are less likely to develop phyllodes tumor.

Risk Factors

• Common risk factors in the development of phyllodes tumor are [risk factor 1], [risk factor 2], [risk factor 3], and [risk factor 4].

Natural History, Complications and Prognosis

• The majority of patients with phyllodes tumor remain asymptomatic for [duration/years].
• Early clinical features include [manifestation 1], [manifestation 2], and [manifestation 3].
• If left untreated, [#%] of patients with phyllodes tumor may progress to develop [manifestation 1], [manifestation 2], and [manifestation 3].
• Common complications of phyllodes tumor include [complication 1], [complication 2], and [complication 3].
• Prognosis is generally [excellent/good/poor], and the [1/5/10­year mortality/survival rate] of patients with phyllodes tumor is approximately [#%].

Diagnosis

Diagnostic Criteria

• The diagnosis of phyllodes tumor is made when at least [number] of the following [number] diagnostic criteria are met:

• [criterion 1]
• [criterion 2]
• [criterion 3]
• [criterion 4]

Symptoms

• Phyllodes tumor is usually asymptomatic.
• Symptoms of phyllodes tumor may include the following:

• [symptom 1]
• [symptom 2]
• [symptom 3]
• [symptom 4]
• [symptom 5]
• [symptom 6]

Physical Examination

• Patients with phyllodes tumor usually appear [general appearance].
• Physical examination may be remarkable for:

• [finding 1]
• [finding 2]
• [finding 3]
• [finding 4]
• [finding 5]
• [finding 6]

Laboratory Findings

• There are no specific laboratory findings associated with phyllodes tumor.

• A [positive/negative] [test name] is diagnostic of phyllodes tumor.
• An [elevated/reduced] concentration of [serum/blood/urinary/CSF/other] [lab test] is diagnostic of phyllodes tumor.
• Other laboratory findings consistent with the diagnosis of phyllodes tumor include [abnormal test 1], [abnormal test 2], and [abnormal test 3].

Imaging Findings

• There are no [imaging study] findings associated with phyllodes tumor.

• [Imaging study 1] is the imaging modality of choice for phyllodes tumor.
• On [imaging study 1], phyllodes tumor is characterized by [finding 1], [finding 2], and [finding 3].
• [Imaging study 2] may demonstrate [finding 1], [finding 2], and [finding 3].

Other Diagnostic Studies

• Phyllodes tumor may also be diagnosed using [diagnostic study name].
• Findings on [diagnostic study name] include [finding 1], [finding 2], and [finding 3].

Treatment

Medical Therapy

• There is no treatment for phyllodes tumor; the mainstay of therapy is supportive care.

• The mainstay of therapy for phyllodes tumor is [medical therapy 1] and [medical therapy 2].
• [Medical therapy 1] acts by [mechanism of action1].
• Response to [medical therapy 1] can be monitored with [test/physical finding/imaging] every [frequency/duration].

Surgery

• Surgery is the mainstay of therapy for phyllodes tumor.
• [Surgical procedure] in conjunction with [chemotherapy/radiation] is the most common approach to the treatment of phyllodes tumor.
• [Surgical procedure] can only be performed for patients with [disease stage] phyllodes tumor.

Prevention

• There are no primary preventive measures available for phyllodes tumor.

• Effective measures for the primary prevention of phyllodes tumor include [measure1], [measure2], and [measure3].

• Once diagnosed and successfully treated, patients with phyllodes tumor are followed-up every [duration]. Follow-up testing includes [test 1], [test 2], and [test 3].