Written and medically reviewed by: Assoc. Prof. Cengiz Dibekoğlu, MD, General SurgeryLast updated:
Soft Tissue Masses
Lipoma, skin cysts, and when to worry
Most lumps are benign — growth rate, depth, pain, and fixation matter together.
A soft, mobile lump in the neck, shoulder, back, or abdomen is often a lipoma or skin cyst. Not every swelling is the same: rapid growth, deep location, fixation, or recurrent infection needs evaluation. This section explains lipomas, epidermoid/pilar cysts, examination and imaging steps, and principles of surgical excision in plain language.
Educational schematic. Some structures may be simplified or emphasized for clarity; not an exact anatomical depiction.
© Cengiz Dibekoğlu — illustrative; not for unauthorized use
Figure summary
- Hero figure: lipoma and epidermoid cyst in a skin cross-section on the upper back.
- Related figures cover lipoma, skin cysts, diagnosis, and treatment pathways.
Educational figures
Tap a figure to enlarge. These English illustrations mirror the Turkish hub gallery for this condition.
Lipoma Educational schematic. Some structures may be simplified or emphasized for clarity; not an exact anatomical depiction.
© Cengiz Dibekoğlu — illustrative; not for unauthorized use
Skin cyst Educational schematic. Some structures may be simplified or emphasized for clarity; not an exact anatomical depiction.
© Cengiz Dibekoğlu — illustrative; not for unauthorized use
Moles and melanoma Educational schematic. Some structures may be simplified or emphasized for clarity; not an exact anatomical depiction.
© Cengiz Dibekoğlu — illustrative; not for unauthorized use
Liposarcoma Educational schematic. Some structures may be simplified or emphasized for clarity; not an exact anatomical depiction.
© Cengiz Dibekoğlu — illustrative; not for unauthorized use
Retroperitoneal Educational schematic. Some structures may be simplified or emphasized for clarity; not an exact anatomical depiction.
© Cengiz Dibekoğlu — illustrative; not for unauthorized use
Diagnosis Educational schematic. Some structures may be simplified or emphasized for clarity; not an exact anatomical depiction.
© Cengiz Dibekoğlu — illustrative; not for unauthorized use
Treatment Educational schematic. Some structures may be simplified or emphasized for clarity; not an exact anatomical depiction.
© Cengiz Dibekoğlu — illustrative; not for unauthorized use
Lipoma
Benign fat tumor — often observed or simply excised.
Skin cysts
Epidermoid / pilar cyst — infected or inflamed cases may need urgent drainage.
Diagnosis
Exam plus ultrasound/MRI; biopsy or excision when uncertain.
Red flags
Rapid growth, deep fixation, pain — do not delay.
What to know
Not every lump is cancer
Lipomas and simple skin cysts are common in adults. The right first step is examination and imaging when needed — not panic.
- Key note inside
When to seek care
Note: “Soft = definitely benign” is not always true.Recent clear growth, pain, redness, fever, skin ulceration, or numbness/weakness with pressure on the mass should not wait.
Not pilonidal or breast cysts
Pilonidal sinus in the natal cleft is a separate topic. Breast cysts belong under breast disease — correct routing matters.
- Key note inside
Deep or suspicious masses
Deep, rapidly growing, or fixed masses raise liposarcoma and retroperitoneal tumors in the differential. Imaging and sometimes tumor-board review guide planning.
What happens next
Benign fatty masses — when to observe or excise
- 1
Lipoma
Benign fatty masses — when to observe or excise
Read this chapter - 2
Skin Cysts
Epidermoid and pilar cysts — inflammation, infection, and excision
Read this chapter - 3
General Diagnosis
Lipoma and skin cysts — exam, ultrasound, MRI
Read this chapter - 4
General Treatment
Lipoma and skin cysts — observation and excision
Read this chapter - 5
Moles and Melanoma
Ordinary moles, common myths, and why change matters
Read this chapter - 6
Mole Diagnosis
Biopsy, Breslow thickness, and the sentinel node
Read this chapter - 7
Melanoma Surgery
Wide excision, sentinel decision, and advanced disease
Read this chapter - 8
Liposarcoma
Deep fatty malignancy — not a lipoma
Read this chapter - 9
Liposarcoma Diagnosis
MRI, biopsy, and tumor board
Read this chapter - 10
Liposarcoma Treatment
Wide excision, radiotherapy, and surveillance
Read this chapter - 11
Retroperitoneal Masses
Deep abdominal tumors — imaging and resection
Read this chapter
Evidence
Scientific sources
Show sources · 2Dermatology and surgical guidance for evaluating superficial soft-tissue lesions. Diagnosis and treatment are individualized after examination.
Evidence
Scientific sources
- 1. AAD — skin cysts and common dermatologic lesions (patient education)American Academy of Dermatology (AAD) · Patient resource libraryOpen source →
- 2. ASCRS clinical practice guidelines libraryAmerican Society of Colon & Rectal Surgeons (ASCRS) · Guideline libraryOpen source →
Last reviewed: 21 August 2026. Links go to publisher pages.
Appointment / info
If you notice a new lump on the neck, back, or abdomen, evaluation can start with history, exam, and targeted imaging.
This page is for education. It is not medical advice and does not replace a visit with your physician.
Medical editor: Assoc. Prof. Cengiz Dibekoğlu, MD · English patient-education hub.