APOCRINE HYDROADENOMA MIMICKING A MORTON’S NEUROMA: A RARE DIFFERENTIAL DIAGNOSIS

A 62-year-old woman, with neuropathic pain and paresthesia in her right forefoot, showed a circumscribed soft tissue swelling on the sole between the second and third metatarsal. Ultrasound (US) imaging showed a well-defined lesion in the second intermetatarsal space, without vascularization sign at Power Doppler (PD). In the first hypothesis, these findings led to Morton’s neuroma. Magnetic Resonance Imaging (MRI), demonstrated a dumbbell-shaped lesion between the II and the III metatarsal heads; it extended cranially to the subcutaneous fat of the dorsal slope. The MRI findings weren’t compatible with a classic Morton’s neuroma and were radiologically undetectable. The patient had a sub-total excisional biopsy. The anatomopathological features were specific to an apocrine hydroadenoma from an ectopic sweat gland. This rare pathology has not been previously described in the literature and it must be considered as a differential diagnosis due to the clinical presentation and the US appearance mimicking Morton’s neuroma.

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Quiz 110

1 / 5

What specialty is most likely to be involved in diagnosing and treating Morton’s neuroma?

 

Gastroenterology

Ophthalmology

Podiatry

Cardiology

2 / 5

What is a key clinical challenge presented by apocrine hydroadinoma?

 

Lack of effective treatments

High rate of recurrence after treatment

Difficulty in distinguishing it from other foot conditions

Rapid spread to other organs

3 / 5

Morton's neuroma primarily affects which part of the body?

 

Shoulder

Knee

Foot

Hand

4 / 5

Which condition did the apocrine hydroadinoma mimic in the case study?

Bunions

Gout

Morton’s neuroma

Plantar fasciitis

5 / 5

What is an apocrine hydroadinoma?

A nerve disorder

A malignant skin cancer

A benign tumor originating from apocrine sweat glands

A type of bone tumor

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