FELON
| A | Bone involvement | |
| B | A closed space infection | |
| C | Digital artery thrombosis | |
| D | Nail bed involvement |
| A | Bone involvement | |
| B | A closed space infection | |
| C | Digital artery thrombosis | |
| D | Nail bed involvement |
A closed space infection : A felon is an infection of the distal pulp space of a digit, usually secondary to a puncture wound. This is a closed space at the level of the distal interphalangeal joint. Since the infection cannot spread proximal to this point, pain is throbbing and intense. Late osteomyelitis may develop in the distal phalanx if the felon is not opened appropriately.
Patient with gluten-sensitive enteropathy has a lifelong history of periodic crops of intensely pruritic, grouped, papular or vesicular lesions on the elbows, knees, sacrum, and shoulders. Because the vesicles are intensely pruritic, the patient routinely scratches the top off them, which relieves the pruritus. Which of the following is the most likely diagnosis?
| A |
Bullous pemphigoid |
|
| B |
Dermatitis herpetiformis |
|
| C |
Herpes simplex I |
|
| D |
Pemphigus vulgaris |
The condition described is dermatitis herpetiformis, which is strongly associated with gluten-sensitive enteropathy (celiac sprue), and often has a life-long, intermittent course.
Clinically, patients have (excoriated) groups of papules and vesicles on an erythematous base.
The lesions tend to involve the extensor surfaces of the extremities and the buttocks.
Microscopically, the lesions show subepidermal papillary dermal neutrophilic abscesses, with granular deposits of IgA and C3 in dermal papillary tips. Patients may respond dramatically to dapsone therapy.
| A |
Index finger |
|
| B |
Ring finger |
|
| C |
Little finger |
|
| D |
Thumb |
Felons are closed-space infections of the fingertip pulp.
Staphylococcus aureus is the most common cause.
Thumb and index finger are the most commonly affected digits.
Felons are characterized by marked throbbing pain, tension, and edema of the fingertip pulp.
Felon is an infection of:
| A |
Scalp |
|
| B |
Face |
|
| C |
Finger |
|
| D |
Scrotum |
Felon/ Whitlow is:
September 2012
| A |
Midpalamr space infection |
|
| B |
Terminal pulp space infection |
|
| C |
Infection of the ulnar bursa |
|
| D |
Infection of the radial bursa |
Ans. B i.e. Terminal pulp space infection
a painful abscess of the deep tissues of the palmar surface of the fingertip that is typically caused by bacterial infection (as with a staphylococcus) and is marked by swelling and pain
