Paget's disease of the breast differential diagnosis

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1];Associate Editor(s)-in-Chief: Preeti Singh, M.B.B.S.[2]

Overview

Paget's disease of the breast must be differentiated from atopic dermatitis, eczema, psoriasis, malignant melanoma, Bowen's disease, basal cell carcinoma, and pagetoid dyskeratosis.

Differential Diagnosis

Paget’s disease of the breast must be differentiated from other benign and malignant processes of nipple-areola complex such as:

• Atopic dermatitis
• Chronic contact dermatitis
• Lactiferous duct ectasia
• Chronic eczema
• Psoriasis
• Nipple duct adenoma
• Malignant melanoma
• Bowen’s disease
• Superficial basal cell carcinoma
• Benign intraductal papilloma
• Pagetoid dyskeratosis

Paget's disease of the breast is often misdiagnosed as nipple eczema

Category	Diseases	Benign or Malignant	Etiology	Clinical manifestations						Para-clinical findings	Gold Standard	Associated factors
				Symptoms				Physical examination
										Histopathology
				Rash	Nipple Discharge	Erythema	Mastalgia	Breast Exam	Other
Skin disorders	Paget's disease of the breast	Malignant	Most the patients have underlying breast cancer.	Ulcerated, crusted, or scaling lesion on the nipple that extends to the areolar region	Serous or bloody nipple discharge may be present.	+		Well-demarcated erythematous and desquamative plaques with irregular borders seen. Breast lump palpated in >50% cases.		The Paget cells are large round cells with abundant clear cytoplasm and atypical nuclei. The cytoplasm is often periodic-acid-Schiff (PAS) positive	Biopsy	50% of the cases of Paget’s disease of the breast are associated with a palpable underlying mass. 90% of the cases will have an invasive intraductal carcinoma of the breast. May positive staining against CEA antigen and the c erbB-2 / her-2 neu oncoprotein.
	Extramammary Paget's disease	Malignant									Biopsy
	Atopic dermatitis (Eczema)	Benign	Epidermal barrier dysfunction Immune dysregulation	Erythema, exudates, papules,vesicles, scales and crusts Infiltrated erythema, prurigo, scales and crusts	–	–		–	Usually bilateral nipple is effected with no accompanying induration. Centrofacial pallor Delayed blanch response Keratosis pilaris Palmar hyperlinearity Pityriasis alba Ichthyosis	Epidermal psoriasiform hyperplasia Marked intercellular edema with spongiotic vesiculation Hyperkeratosis Psoriasiform hyperplasia Dyskeratosis		Family history of atopy History of silicon implants or reconstruction of nipple areola complex or lactation. Personal history of atopy or extramammary Paget's disease or hematological diseases Combined usage of interferon alfa-2b and ribavirin.
	Erosive adenomatosis of the nipple	Benign Neoplasm of breast lactiferous ducts	Proliferation of the inner epithelial layer and outer, basal layer of myoepithelial cells of the lactiferous ducts the nipple.	Eczema, crusts or erosion of nipple	Serous or bloody nipple discharge.	+	–	Nipple may have unencapsulated, firm granulomatous lesion . A non-tender nodule either within or under the nipple adherent to the skin, but not the breast may be palpated.	Insidious onset. Erythema may be seen prior to erosion. No lymphadenopathy.	Overlying epidermis often shows acanthosis and hyperkeratosis. Papillomatous pattern: vascular papillae project into dilated lumina and are surrounded by proliferating epithelial cells . Papillary pattern: cells proliferate into large cords with deep fissures and clefts and dense stroma.	Biopsy: Shows absence of cytological atypia	Incidence is highest in the fifth decade in women. No lymphadenopathy.
	Allergic contact dermatitis	Benign	Delayed-type hypersensitivity response Skin inflammation mediated by hapten-specific T cells	Erythematous well-demarcated papules	–	–	+		Stinging and burning Localized swelling Lichenified pruritic plaques	Eosinophilic spongiosis and microvesicles Exocytosis of eosinophils and lymphocytes Chronic - Hyperkeratosis and parakeratosis		Contact with allergens in the past 1-2 days Positive family history
	Psoriasis	Benign	Keratinocyte hyperproliferation Dysregulation of the immune system	Well-circumscribed, pink papules and symmetrically distributed cutaneous plaques with silvery scales	–	+	+		Auspitz's sign (pinpoint bleeding)	Epidermal hyperplasia Parakeratosis Neutrophils microabscesses (Munro microabscesses)	Epidermal hyperplasia Parakeratosis Neutrophils microabscesses (Munro microabscesses)	Risk factors include Smoking Skin trauma Alcohol abuse Stress Cold weather Vitamin D deficiency
	Malignant melanoma	Malignant	Neural crest cell derivative Development begins with disruption of nevus growth control Progression involves MAPK/ERK pathway N-RAS or BRAF oncogenealso involved	Macule Plaque with irregular border Variable size A lesion with ABCD Asymmetry Border irregularity Color variation Diameterchanges Bleeding from the lesion	– Bleeding from the lesion may be present							UV radiations Genetic predisposition Old age Male gender Family or personal history of melanoma Multiple benign or atypical nevi
	Bowen’s disease	Benign can turn malignant		Erythematous Skin colored Patch Plaque scaly variable size	–				Presence of dotted and/or glomerular vessels White to yellowish surface scales Red-yellowish background	Keratinocytic dysplasia of the epidermis No infiltration into dermis Pleomorphic keratinocytes Hyperchromatic nuclei		Slow growth over the years
	Superficial basal cell carcinoma	Malignant		Erythematous Superficial scaly patch	–				Superficial fine telangiectasia Shiny white to red, translucent or opaque structureless areas Multiple small erosions	Large, hyperchromatic, oval nuclei Minimal cytoplasm Small basaloid nodules		Higher incidence in men
	Benign intraductal papilloma
	Pagetoid dyskeratosis
	Lactiferous duct ectasia	Benign	Common among perimenopausal women Usually resolve spontaneously								Ultrasound: Dilated milk ducts Fluid-filled ducts
	Nevoid hyperkeratosis of the nipple and areola (NHNA)	Benign	Common among premenopausal women	slow growing brown pigmentation and verrucous thickening of the nipple or areola.	–	–	–	The skin of the nipple and areola is thickened and hyperpigmented developing an isolated nevoid defect .	Usually bilateral nipple is effected	Acanthosis, hyperkeratosis, and papillomatosis of the epidermis	Biopsy	NHNA might be hormonal hyperkeratosis as it is shown to worsen in pregnancy. Might seperately effect the nipple or only the areola Associated with Darier’s disease, chronic acanthosis nigricans, cutaneous Tcell lymphoma, mycosis fungoides, and follicular mucinosis.
	Benign Toker cell hyperplasia
	Breast abscess	Benign					+	Localized inflammation of breast Tenderness			Ultrasound: Fluid collection
	Mondors disease
	Mastitis	Benign No increased risk of malignancy					±	Breasttenderness Swollen breasttissue		Breast parenchymainflammation: Acute mastitis: Staphylococcus infection Granulomatous mastitis: Tuberculosis or sarcoidosisinfection	Ultrasound: Ill-defined area with hyperechogenicity with inflamed fat lobules Skin thickening
	Inflammatory Breast Cancer	Malignant									Biopsy