Friable, rapidly growing vascular nodule that bleeds easily; a benign reactive proliferation despite its name.
Also known as: lobular capillary hemangioma, PG, granuloma telangiectaticum
Overview
Pyogenic granuloma (lobular capillary hemangioma) is a benign, acquired, rapidly growing vascular proliferation that presents as a friable, dome-shaped, often pedunculated red papule or nodule. It is neither pyogenic (no infection) nor a granuloma (no granulomatous inflammation) — both terms are historical misnomers.
Epidemiology
Common at all ages; peak in children and young adults. Gingival pyogenic granuloma in pregnancy ('granuloma gravidarum') affects approximately 5% of pregnant women, usually in the second trimester. Equal sex distribution outside of pregnancy.
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Question 1DermatologyMedium
A 26-year-old woman who is 30 weeks pregnant presents with a rapidly growing, glossy red nodule on her gingiva that has enlarged over 3 weeks and bleeds profusely with minor contact such as brushing her teeth. The lesion is 8 mm, soft, and pedunculated, with a slightly eroded surface. Which of the following is the most likely diagnosis?
AAmelanotic melanoma
BPyogenic granuloma
CBasal cell carcinoma
DKaposi sarcoma
Reveal answer & full explanation
Correct answer: B — Pyogenic granuloma
AAmelanotic melanoma
BPyogenic granuloma✓
CBasal cell carcinoma
DKaposi sarcoma
Why Pyogenic granuloma is correct
A pyogenic granuloma (lobular capillary hemangioma) is a benign, rapidly growing, friable vascular nodule that bleeds easily with trivial trauma; it favors the fingers, lips, and gingiva and is classically triggered by pregnancy (granuloma gravidarum/epulis) or local trauma.
The rapid growth, profuse bleeding, pedunculated shape, and pregnancy setting are typical.
Why the others are wrong
Amelanotic melanoma — is the key mimic and the reason excised lesions are sent for histology, but it grows more slowly and is far less common in this setting.
Basal cell carcinoma — is a slow-growing, pearly, telangiectatic papule on sun-exposed skin of older adults, not a friable gingival nodule in a young pregnant woman.
Kaposi sarcoma — presents as violaceous plaques in patients with advanced HIV, not a solitary bleeding gingival nodule of pregnancy.
Question 2DermatologyMedium
A young adult develops a solitary, rapidly enlarging, friable red papule at the site of a recent finger prick. Histopathology after removal shows a circumscribed proliferation of capillaries arranged in lobules within an edematous stroma, without atypia or malignant features. Which of the following best describes the underlying nature of this lesion?
AAn infection producing true granulomatous inflammation
BA malignant tumor of melanocytic origin
CA benign reactive proliferation of capillaries
DA clonal proliferation of neoplastic lymphocytes
Reveal answer & full explanation
Correct answer: C — A benign reactive proliferation of capillaries
AAn infection producing true granulomatous inflammation
BA malignant tumor of melanocytic origin
CA benign reactive proliferation of capillaries✓
DA clonal proliferation of neoplastic lymphocytes
Why A benign reactive proliferation of capillaries is correct
Despite its misleading name, a pyogenic granuloma is neither pyogenic (infectious) nor a true granuloma.
It is a benign reactive proliferation of capillaries — a lobular capillary hemangioma — that arises after minor trauma or hormonal stimulation, which is exactly what the lobular capillary architecture without atypia shows. Recognizing this benign vascular nature explains why it is cured by complete removal yet can recur if incompletely excised.
Why the others are wrong
An infection producing true granulomatous inflammation — would show epithelioid histiocytes and giant cells, which are absent here.
A malignant tumor of melanocytic origin — would show atypical melanocytes; its resemblance to amelanotic melanoma is why histology is obtained, but the lobular capillary pattern is benign.
A clonal proliferation of neoplastic lymphocytes — describes lymphoma, not a vascular lobular lesion.
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Cutaneous capillary malformation (port-wine stain) as a substrate
Periungual location after onychocryptosis or repetitive trauma
Pathophysiology
A reactive proliferation of capillaries arranged in lobules within a fibromyxoid stroma, often surrounded by an epidermal collarette. Trauma and angiogenic factors (VEGF, basic FGF) appear to drive proliferation. Despite the rapid growth and friability, lesions are benign and do not metastasize.
Clinical presentation
Symptoms
Rapid growth over days to weeks of a red nodule, often at a site of recent trauma
Frequent, often dramatic bleeding from minor contact
Sometimes painful, especially periungual or oral lesions
Pregnancy-associated gingival PG often presents with bleeding gums
Signs / physical exam
Bright red to dusky, dome-shaped or pedunculated friable papule/nodule, 0.5-2 cm
Surface may be ulcerated, crusted, or covered by a thin epidermal collarette
Typical locations: fingers, hands, lips, oral mucosa, face, trunk; gingiva and lips in pregnancy
Multiple lesions less common; multiple in an immunocompromised host should prompt evaluation for bacillary angiomatosis or KS
Classic findings
Solitary, friable, bright-red, pedunculated nodule with epidermal collarette that bleeds easily, often on a finger after minor trauma.
Differential diagnosis
Amelanotic melanoma — Pink/red papule or nodule, often ulcerated; biopsy mandatory for any suspect lesion that bleeds or recurs after excision
Bacillary angiomatosis — Multiple friable red papules in immunocompromised patient (HIV, transplant); Bartonella henselae or B. quintana; responds to doxycycline/erythromycin
Kaposi sarcoma — Multiple violaceous patches/plaques/nodules, classically in MSM/HIV or elderly Mediterranean men; HHV-8 associated
Spitz nevus — Pink-red dome in children; benign but can resemble PG and melanoma; biopsy
Cherry hemangioma — Multiple small bright red papules on trunk of adults, stable, non-friable
Diagnostic workup
Diagnostic criteria
Clinical diagnosis supported by histology when excised. Histology shows lobular collections of capillaries in a fibromyxoid stroma with an epidermal collarette.
Labs
Generally none required
Histopathology of excised specimen confirms the diagnosis and rules out amelanotic melanoma or other vascular lesions
HIV testing and Warthin-Starry stain if multiple lesions in an immunocompromised host (rule out bacillary angiomatosis)
Imaging
Not routinely indicated for typical lesions
Imaging or referral for vascular tumors when atypical, deep, or recurrent lesions raise suspicion for vascular malformation or sarcoma
Diagnostic algorithm
Feature
Pyogenic Granuloma
Amelanotic Melanoma
Bacillary Angiomatosis
Onset
Days to weeks
Months
Weeks, often multiple
Number
Usually solitary
Solitary
Often multiple
Host
Healthy at any age; pregnancy
Adults, sun-damaged or de novo
Immunocompromised (HIV)
Color/Surface
Bright red, friable, collarette
Pink-red, may ulcerate, irregular
Red-violaceous papules/nodules
Bleeding
Easily, often
Possible
Possible
Histology
Lobular capillary proliferation
Atypical melanocytes
Bartonella organisms on Warthin-Starry
Treatment
Shave + cautery, full excision, timolol
Wide local excision per AJCC
Doxycycline or erythromycin
Pyogenic granuloma and its critical mimics — never skip histology on an excised PG.
Treatment
First-line
Shave excision with cautery (or electrodesiccation) of the base — most common office procedure; recurrence ~10-15%
Full-thickness excision with primary closure — lowest recurrence rate (~3-5%), preferred for periungual or recurrent lesions
Send all specimens to pathology to exclude amelanotic melanoma
In pregnancy: defer aggressive intervention when possible — many lesions involute postpartum; control bleeding with conservative measures
Second-line / adjunct
Cryotherapy with liquid nitrogen for small lesions
Topical timolol 0.5% solution or gel BID — effective particularly in children (avoids procedure)
Topical imiquimod 5% or topical timolol/propranolol combinations
Pulsed dye laser for small, residual, or recurrent lesions
Silver nitrate application after shave excision to reduce recurrence
Sclerotherapy or surgical excision for deeper or larger lesions
For drug-induced PG: dose modification of offending drug (especially retinoids and EGFR inhibitors) and topical timolol or shave excision
Complications
Bleeding — often the chief complaint and a reason to treat promptly
Recurrence after incomplete removal (10-15% after shave-and-cauterize)
Cosmetic deformity, scarring
Multiple 'satellite' lesions after shave excision (Warner-Wilson-Jones phenomenon) — usually self-resolve or respond to repeat treatment
Misdiagnosis of amelanotic melanoma if biopsy is omitted
PANCE pearls
Always send the specimen to pathology — amelanotic melanoma can masquerade as a 'pyogenic granuloma' and be missed without histology.
Shave excision with electrodesiccation of the base is fast and effective; full-thickness excision yields the lowest recurrence.
Topical timolol 0.5% is a useful non-procedural option, especially in pediatric patients.
Pregnancy-associated lesions often involute postpartum; reserve definitive treatment for bleeding or functional concerns.
Multiple periungual PG-like lesions in a patient on isotretinoin or an EGFR inhibitor are drug-induced; manage with timolol or topical/intralesional steroids and consider dose modification.
Multiple PG-like lesions in an immunocompromised host should prompt evaluation for bacillary angiomatosis (Bartonella) or Kaposi sarcoma.
References
AAD review — Wollina U et al. Pyogenic granuloma — a review of clinical, histopathological and therapeutic aspects (J Cosmet Dermatol 2017)
Pediatric Dermatology — Pagliai KA, Cohen BA. Pyogenic granuloma in children (Pediatr Dermatol 2004)
Topical timolol — Khorsand K et al. Pyogenic granuloma in a 5-month-old treated with topical timolol (Pediatr Dermatol 2015)
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