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Lumps & Bumps: Soft Tissue Masses and Lesions

Video Published 2018-11-10 Updated 2026-08-01

Timestops (8)

Topic Overview

A clinical discussion on common pediatric soft tissue masses and lesions, covering pyogenic granulomas, Spitz nevi, melanoma, cervical lymphadenopathy, atypical mycobacterial infections, neonatal breast mastitis, skin abscesses, and fibroadenomas. The panel debates management strategies including observation versus surgical excision, antibiotic use, margin requirements, and the role of sentinel lymph node biopsy. Key themes include balancing conservative management against diagnostic certainty, minimizing surgical morbidity in cosmetically sensitive areas, and addressing parental anxiety when clinical suspicion for malignancy is low.

Key Takeaways

  • Surgical resection of pyogenic granuloma has lowest recurrence (3%) vs shave/curettage (9.5%) or silver nitrate (15%) (4:47)
  • Spitz nevi: 80% involute spontaneously; incomplete excision safe to observe (0% recurrence in 24/30 patients) (8:28)
  • Melanoma margins: in situ needs 5mm, ≤1mm thick needs 1cm, 1.1-2mm needs 1-2cm, >2mm needs 2cm (not 4cm) (19:35)
  • Atypical mycobacterial lymphadenitis: surgery 96% cure vs antibiotics 66%, but 30/45 on antibiotics resolved without surgery (38:31)
  • Neonatal breast mastitis I&D risks permanent deformity (2/5 and 2/7 in series); consider antibiotics first (52:39)

Inside this episode

Kai, the Library's AI content creator, listened to this episode and mapped who's speaking, the chapters, key claims, and cases. Every item links to the exact moment in the recording.

AI-enriched

Who's speaking

  • Todd — host
  • Danielle Walsh — guest
  • Oliver Witt — guest
  • Speaker 4 — guest
  • Speaker 5 — guest
  • Joy Collins — guest

Chapters

  • 0:00Introduction and Pyogenic Granuloma — Session introduction and discussion of a 12-year-old with a red shoulder lesion identified as pyogenic granuloma. Panel debates treatment options including silver nitrate cauterization versus surgical excision.
  • 7:42Spitz Nevus Management — Discussion of atypical Spitz nevus with positive margins. Panel reviews re-excision criteria, margin requirements, and the controversial role of sentinel lymph node biopsy in pediatric Spitz nevi.
  • 14:37Pediatric Melanoma — Management of melanoma in children including margin requirements based on depth, sentinel lymph node biopsy indications, and differences between pediatric and adult melanoma presentation and outcomes.
  • 21:48Cervical Lymphadenopathy Workup — Evaluation and management of persistent cervical lymph nodes in children. Discussion covers observation periods, antibiotic use, laboratory workup, imaging studies, and indications for biopsy.
  • 36:17Atypical Mycobacterial Infection — Management of atypical mycobacterial cervical lymphadenitis including antibiotic therapy with clarithromycin and rifampin versus surgical excision, with discussion of cure rates for each approach.
  • 41:49Neonatal Breast Mastitis and Skin Abscesses — Management of breast mastitis in infants and general approach to pediatric skin abscesses including drainage techniques, packing versus vessel loop, antibiotic use, and admission criteria.
  • 50:24Fibroadenomas — Evaluation and management of breast fibroadenomas in adolescents. Discussion covers observation versus excision, follow-up intervals, distinction between simple and complex lesions, and genetic testing considerations.

Key claims

  • 4:47Pyogenic granuloma has lowest recurrence rate with surgical resection at about 3% with gross negative margins — Danielle Walsh
  • 5:04Shave excision with curettage of pyogenic granuloma has about 9.5% recurrence rate — Danielle Walsh
  • 5:20Silver nitrate treatment of pyogenic granuloma has 15% recurrence rate, the highest among treatment options — Danielle Walsh
  • 4:14Retinoid medications for acne are significantly associated with development of pyogenic granulomas in teenagers — Danielle Walsh
  • 8:2880% of characteristic Spitz nevi involute spontaneously — Danielle Walsh
  • 8:44Half of pediatric dermatologists would observe classic Spitz nevi without excision — Danielle Walsh
  • 9:43In a series of 30 patients with incompletely removed Spitz nevi, 24 were observed and none recurred — Danielle Walsh
  • 10:23With 1-3 millimeter margins for Spitz nevi, 20% were still positive on re-excision — Danielle Walsh
  • 11:56About one-third of Spitz nevi cases had nodal micrometastases on sentinel lymph node biopsy — Danielle Walsh
  • 12:1839% of Spitz nevi had positive sentinel lymph node biopsies, but all remained disease-free at 3-year follow-up without further treatment — Danielle Walsh
  • 18:28Pediatric melanoma ABCDE criteria only capture 40% of cases in children under 10 and 60% in children over 11 — Danielle Walsh
  • 19:35Melanoma margins: in situ lesions need 5mm, 1mm thick or less need 1cm, 1.1-2mm need 1-2cm, over 2mm need 2cm — Danielle Walsh
  • 19:50Cochrane review suggests 2 centimeter margins are adequate for thick melanomas, not 4 centimeters — Danielle Walsh
  • 20:12Giant congenital nevi have 8% melanoma risk, higher if hairy, with 60% developing melanoma in first decade — Danielle Walsh
  • 20:35Pediatric melanoma has higher metastatic rate to lymph nodes at about 25%, especially in children younger than 10 and with thicker lesions — Danielle Walsh
  • 21:02If sentinel node is negative in melanoma, probability of subsequent recurrence is only about 5% — Danielle Walsh
  • 30:57Acute unilateral cervical lymphadenopathy is mostly bacterial, likely strep and staph — Danielle Walsh
  • 31:20Acute bilateral cervical lymphadenopathy is usually viral — Danielle Walsh
  • 31:30Chronic subacute unilateral lymphadenopathy suggests atypical mycobacteria, Bartonella, or tuberculosis — Danielle Walsh
  • 32:43Lymphadenopathy may persist for 6 to 8 weeks after antibiotic treatment — Danielle Walsh
  • 34:58FNA for lymph nodes has about 90% sensitivity and specificity but has higher false negative rate in Hodgkin lymphoma — Danielle Walsh
  • 35:39Malignancy rate in cervical lymph node biopsies ranges from 10-80% depending on referral patterns and specialty — Danielle Walsh
  • 38:31In randomized multicenter trial, surgery for atypical mycobacteria had 96% cure rate versus 66% for antibiotics alone — Danielle Walsh
  • 39:08In study of 45 patients with mycobacterial lymphadenitis started on antibiotics, 30 resolved without surgery — Danielle Walsh
  • 38:07Atypical mycobacteria is not considered contagious and children do not need to be kept out of school or daycare — Danielle Walsh
  • 50:46Neonatal breast mastitis peaks at 2-4 weeks of age and is mostly staph, though gram negatives are reported — Danielle Walsh
  • 52:39In two small series, 2 of 5 and 2 of 7 infants who had I&D for breast mastitis developed breast deformity — Danielle Walsh
  • 63:11Fibroadenomas are the most common breast lesion in patients under age 20 — Danielle Walsh
  • 63:2010-15% of fibroadenomas are multiple and 10% are bilateral — Danielle Walsh
  • 63:31Fibroadenomas typically increase in size over 6-12 months then stabilize and can regress completely — Danielle Walsh
  • 65:57Simple fibroadenomas have no increased cancer risk if no family history and no abnormality in adjacent breast tissue — Danielle Walsh
  • 66:14Complex fibroadenomas with cysts, calcifications, or abnormal surrounding tissue have slight increased risk of breast cancer up to 20 years later — Danielle Walsh
  • 65:14Juvenile fibroadenomas greater than 5 centimeters are difficult to distinguish from cystosarcoma phyllodes even on percutaneous biopsy — Danielle Walsh
  • 66:42Malignant breast disease in pediatric population is more commonly metastatic from other lesions than primary breast tumor — Danielle Walsh
  • 66:53Lymphoma patients treated with chest radiation at young ages have up to 25% higher incidence of malignant breast disease — Danielle Walsh

Cases discussed

  • 1:4212-year-old female with enlarging red shoulder lesion over several months, asymptomatic
  • 5:40Patient with pyogenic granuloma that returned as Spitz nevus with atypical features on pathology
  • 14:39Spitz nevus confirmed as 2mm thick melanoma on external review
  • 22:286-year-old with 1-month history of enlarged cervical lymph node
  • 36:173-year-old with large cervical swelling from atypical mycobacteria
  • 41:49Female infant with 2cm breast mastitis and 1cm fluctuance
  • 55:0816-year-old with 2.5cm breast mass, ultrasound consistent with fibroadenoma

Points of disagreement

  • 2:32Initial treatment of pyogenic granuloma
    • Oliver Witt: Excise with minimal margin, has not had good experience with silver nitrate
    • Speaker 4: Would try silver nitrate once but be quick to excise due to bleeding and parental anxiety
  • 6:52Management of Spitz nevus with positive margins
    • Speaker 5: Re-excise with wider margins if positive
    • Oliver Witt: If margin negative on first excision, no further action needed
  • 7:27Sentinel lymph node biopsy for Spitz nevi
    • Danielle Walsh: Asked if anyone does sentinel node for atypical Spitz
    • Joy Collins: Does not do sentinel node for Spitz, only for melanomas
  • 24:47Management of 2-month persistent cervical lymph node
    • Oliver Witt: Would do outpatient biopsy at this point
    • Speaker 4: Would cave to pressure from pediatrician and family for biopsy
    • Speaker 5: Would get chest x-ray and CBC, continue observation if normal, lymphoma grows extremely fast so unchanged node over 2 months unlikely to be lymphoma
    • Danielle Walsh: Would follow with CBC and chest x-ray, bring back in 1 month then another month, then as needed if not growing
  • 53:51Culturing routine skin abscesses
    • Oliver Witt: Does not usually culture
    • Danielle Walsh: Only cultures in immunosuppressed or diabetic patients
    • Speaker 4: Used to stop culturing but now cultures again due to MRSA concerns and resistance patterns
  • 45:50Packing versus vessel loop versus nothing after abscess drainage
    • Todd: Likes to pack
    • Speaker 4: Vessel loop or nothing depending on size, never packing
  • 47:59Antibiotics after abscess drainage in non-sick child
    • Todd: Would use antibiotics if cellulitis present outside abscess
    • Speaker 5: Has not done no antibiotics but would like to
    • Danielle Walsh: Usually continues antibiotics they were already on
    • Speaker 4: Often avoids antibiotics unless there is pressure from parents
  • 55:28Management of 16-year-old with fibroadenoma
    • Oliver Witt: Watch and wait, ultrasound very specific for fibroadenoma, very low malignancy risk
    • Todd: Multiple panelists favored excision
    • Speaker 4: Would try to talk family into waiting, follow frequently, some resolve especially multiple fibroadenomas

Open questions

  • What is the optimal follow-up interval and duration for observing fibroadenomas in adolescents?
  • Does needle aspiration of neonatal breast abscesses reduce breast deformity rates compared to incision and drainage?
  • Is there benefit to culturing routine pediatric skin abscesses given the cost and infrequent management changes?
  • What is the role of postoperative antibiotics after drainage of uncomplicated skin abscesses in non-toxic children?
  • Should atypical mycobacterial lymphadenitis be treated with antibiotics first or proceed directly to surgical excision?
  • What is the true malignancy rate of cervical lymph nodes in the general pediatric surgery population versus subspecialty referral centers?
  • At what age and under what circumstances should BRCA genetic testing be offered to adolescents with breast masses and family history?
This episode was analyzed and enriched by Kai, the Library's AI content creator. Every item links to the moment it comes from — click a timestamp to listen in context.
Written for:

Neonatal Breast Mastitis: Balancing Drainage Against Permanent Deformity

The patient case from this episode, retold from presentation to outcome with the decisions made along the way. Written by Kai from the episode transcript and reviewed before publishing.

For the care team · Case narrative · AI-written, human-reviewed

The Presentation

A female infant presented with a breast mastitis containing a fluctuant center 50:46. The timing was typical — neonatal breast mastitis peaks at 2 to 4 weeks of age, driven by maternal estrogen exposure in term or near-term infants 50:46. The likely organisms were staphylococcus, though gram-negative bacteria have been reported in this population 50:46.

The Decision Point

The clinical question was straightforward: drain or don't drain? But the stakes were not 52:39. The panel split three ways 52:39. Some favored antibiotics with warm compresses alone 52:39. Others advocated needle aspiration with antibiotics 52:39. A third group recommended incision and drainage with antibiotics 52:39. "The infection can destroy the breast bud just like the surgery can," one discussant argued. "So I'd like to get the pus out and get them better and get them on their way" [q7].

The counterargument rested on two small but sobering series 52:39. In one, 5 infants underwent incision and drainage for breast mastitis; 2 developed breast deformity 52:39. In the other, 7 infants were drained; 2 had deformities 52:39. These are not large numbers, but the denominator is small and the consequence is permanent 52:39. The literature supporting any approach is sparse 52:39.

The age of the infant mattered 50:46. Very young infants — those in the 2-to-4-week peak — generated more caution about surgical intervention 50:46. Older infants with larger abscesses tilted the discussion toward drainage 52:39.

What Was Done

The panel leaned toward drainage when fluctuance was present, but with strict technical discipline 52:39. If an incision was made, it should be minimal — just enough to evacuate pus without traumatizing the developing breast bud 52:39. One discussant emphasized that "less is more," minimizing both incision size and the amount of dissection 52:39.

Packing was contentious 52:39. Some never pack 52:39. Others use a vessel loop or minimal packing, not to fill the cavity but to keep the incision open long enough to promote drainage 52:39. One panelist explained the rationale for maintaining an open incision to allow continued drainage 52:39.

Antibiotics were standard, but the choice mattered for reasons beyond microbiology 52:39. Clindamycin, despite good staphylococcal coverage, tastes terrible, and young children often refuse it 52:39. Bactrim or a cephalosporin may be more practical in this age group 52:39. Local resistance patterns should guide the choice 52:39.

What the Case Changes

Neonatal breast mastitis sits at the intersection of two risks: the infection itself can destroy the breast bud, but so can the surgery meant to treat it 52:39. The literature does not resolve this tension — it barely addresses it 52:39. The discussants' approach reflects that uncertainty: drain when you must, but do so with the smallest intervention that will work 52:39.

The practical takeaway is technical restraint 52:39. If you drain, use the smallest incision that allows evacuation 52:39. Avoid aggressive dissection 52:39. If you pack, pack minimally and only to maintain drainage, not to fill space 52:39. If you prescribe antibiotics, choose one the child will actually take 52:39.

The outcome in any individual case remains unpredictable 52:39. Breast deformity occurred in roughly one-third of drained patients in the available series, but the natural history of untreated fluctuant mastitis in this population is not well documented 52:39. The discussants made their choices knowing the evidence was thin, the consequences were lasting, and the correct answer — if one exists — would not be found in the literature they had 52:39.

Takeaways from this story

  • Neonatal breast mastitis peaks at 2-4 weeks; both infection and surgical drainage can destroy the developing breast bud.
  • In small series, 2 of 5 and 2 of 7 infants drained for breast mastitis developed permanent breast deformity.
  • If drainage is performed, minimize incision size and tissue trauma; packing should maintain drainage, not fill the cavity.
  • Clindamycin has good staph coverage but tastes terrible — young infants often refuse it; consider Bactrim or cephalosporins.

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